POWER SUPPLY DEVICE WITH OVERLOAD PROTECTION

Abstract

A power supply (100) may include a power converter circuit (130, 140) that can be configured to monitor the magnitude of an output voltage (Vout) and generate a signal indicating the magnitude of the output voltage. The power supply may include an overload protection circuit (110) that is configured to receive a feedback signal (VFB1) indicating the magnitude of an input current (Iin) from the power converter circuit.The power supply may include a control circuit (150) that is configured to determine a magnitude of a requested power based on the signal indicating the magnitude of the output voltage, and to turn off the power supply (e.g., to control the magnitude of the output voltage to zero volts) when the magnitude of the requested power is greater than a second threshold and the magnitude of the input power indicated by the first feedback signal is less than a third threshold.

Description

POWER SUPPLY DEVICE WITH ELECTRICAL OVERLOAD PROTECTION CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to U.S. Provisional Patent Application No. 63 / 222,353, filed July 15, 2021, which is incorporated herein by reference in its entirety. BACKGROUND A power supply is a device or system capable of providing power to an electrical load, typically by converting electrical energy from one form to another to make the power compatible with the electrical load's requirements. For example, a power supply might convert 120 or 240 volt alternating current ("AC") power into low-voltage regulated direct current ("DC") power appropriate for the electrical load's use, such as a lighting load or a motor load. The power supply may be integrated with the electronic load or may be a separate component external to the electrical load. Power supplies may include hardware-based overcurrent protection circuitry that detects when the amount of power supplied by the power supply exceeds a predetermined threshold (e.g., a power threshold defined by the power supply class, such as by a standards organization like Underwriters Laboratories (UL)). Thus, when the power supply outputs power that exceeds the predetermined threshold, the power supply's overcurrent protection circuitry is configured to cause the power supply to shut down (e.g., reduce the output power to zero). COMPENDIUM Component failures may occur within a power supply, and thus, a power supply may include one or more redundant overcurrent protection schemes. For example, a power supply may be configured to deliver an amount of power, e.g., to an electrical load or a load control device. The power supply may include a regulator circuit, an electrical overload protection circuit, and a control circuit. The regulator circuit may be configured to control a magnitude of an output voltage to control the amount of power delivered from the power supply over a power range. The regulator circuit may be configured to generate a signal indicating the magnitude of the output voltage. The electrical overload protection circuit may be configured to receive a feedback signal indicating a PbRQ I n / b7n7 / =l / YI magnitude of an input current of the regulator circuit. The control circuit may be configured to determine the input power based on the input current and a bus voltage of the control device. The electrical overload protection circuit may also be configured to disable the power supply (e.g., control the magnitude of the output voltage to be zero volts) in response to the magnitude of the input power indicated by the feedback signal exceeding a first threshold indicating an electrical overload condition (e.g., a power in the range of 95-100 watts). A power supply may be provided for controlling an amount of power supplied by the power supply. The power supply may include a power converter circuit and an electrical overload protection circuit and / or a control circuit. The power converter circuit may be configured to control a magnitude of an output voltage. The power converter circuit may be configured to generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating the magnitude of the output voltage. The electrical overload protection circuit may be configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit.The electrical overload protection circuit may be configured to control the magnitude of the output voltage to approximately zero volts in response to the magnitude of the input current exceeding a first threshold indicating an electrical overload condition. The control circuit may be configured to determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage. The control circuit may be configured to control the magnitude of the output voltage to approximately zero volts when the magnitude of the requested power is greater than a second threshold and the magnitude of the input current is less than a third threshold.The control circuit may be configured to control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal indicating the magnitude of the output voltage. The power supply may include an error generating circuit. In some examples, the error generating circuit may be external to the control circuit. In other examples, the error generating circuit may be internal to the control circuit. The error generating circuit may be configured to receive the second feedback signal indicating the magnitude of the output voltage of the power converter circuit and a target voltage indicating a desired magnitude of the output voltage. The error generating circuit may be configured to generate a signal indicating the magnitude of the requested power in response to the voltage. PfrRQ In / b7n7 / =l / YI target and the second feedback signal. The control circuit may be configured to receive the signal indicating the magnitude of the requested power from the error generating circuit. The control circuit may be configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power. In some examples, the control circuit may be configured to control the power converter circuit to adjust the magnitude of the output voltage toward the desired magnitude in response to the signal indicating the magnitude of the requested power.In some examples, the control circuit may be configured to compare the magnitude of the input current to an input current threshold to detect an electrical overload condition, and control the magnitude of the output voltage to be approximately zero volts in response to detecting the electrical overload condition. In some examples, the control circuit may be configured to determine an input power of the power converter circuit based on the magnitude of the input current and the magnitude of the input voltage of the power converter circuit, compare the magnitude of the input power of the power converter circuit to an input power threshold to detect an electrical overload condition, and control the magnitude of the output voltage to be approximately zero volts in response to detecting the electrical overload condition. The control circuit is further configured to receive the second signal indicating the magnitude of the output voltage of the power converter circuit, and determine the magnitude of the requested power from the second feedback signal. For example, in some of those examples, the control circuit may comprise the error generating circuit. The error generating circuit may be configured to receive the signal indicating the magnitude of the output voltage of the power converter circuit and generate a signal indicating the magnitude of the requested power, and the control circuit may be configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.For example, the control circuit may be configured to sample the signal indicating the magnitude of the output voltage to determine the magnitude of the output voltage and determine the requested power based on the determined magnitude of the output voltage. The control circuit may be configured to compare the magnitude of the requested power with the second threshold, and compare the magnitude of the input current indicated by the feedback signal with the third threshold. The control circuit may be configured to control the magnitude of the output voltage to be approximately zero volts when the first feedback signal (e.g., the magnitude of the input current indicated by the first feedback signal) is greater than a fourth threshold indicating an overcurrent condition. In some examples, the first threshold may be greater than the fourth threshold. PbROLn / bZnZ / q / YI control circuit may be configured to operate in a normal operating mode when the first feedback signal (e.g., the magnitude of the input current indicated by the first feedback signal) is greater than the third threshold, but less than the first threshold, and the magnitude of the requested power is greater than the second threshold. The control circuit may be configured to generate a drive signal to control the power converter circuit to adjust an average magnitude of the output voltage. The control circuit may be configured to control the drive signal to adjust the magnitude of the output voltage to approximately zero volts when the magnitude of the requested power is greater than the second threshold and the magnitude of the input current indicated by the feedback signal is less than the third threshold. The second threshold may be determined such that the magnitude of the requested power is configured to exceed the second threshold when the power supply is supplying power during a normal operating mode. The signal indicative of the magnitude of the output voltage may indicate an operating period of one or more switching circuits of the power converter circuit, and / or the second threshold may be an operating period threshold. The first threshold may be a maximum power threshold. The third threshold may be a basic power threshold that is lower than the maximum power threshold. In some examples, the power converter circuit may include a half-bridge converter circuit. For example, the power converter circuit may include a half-bridge inverter circuit that includes two switching circuits for generating an inverting voltage. The power converter circuit may include a transformer that includes a primary side configured to receive the inverting voltage and a secondary side configured to provide the output voltage from the power supply. The power converter circuit may include an error generating circuit located on the secondary side of the transformer and coupled across the output voltage. The error generating circuit may be configured to generate the signal indicating the magnitude of the output voltage. In some examples, the power supply may be configured to filter and amplify a sense signal to generate the feedback signal.For example, the power supply may include a sense resistor, and input current may be driven through the sense resistor to generate the sense signal across the sense resistor. In some examples, the power supply may include an AC-to-DC converter circuit configured to receive an alternating current (AC) voltage and generate the DC voltage. In such examples, the control circuit may be configured to provide a bus voltage control signal to the AC-to-DC converter circuit to adjust a magnitude of the DC voltage, and receive a bus voltage feedback signal indicative of the magnitude of the DC voltage from the AC-to-DC converter circuit. PbAOLn / bZnZ / q / YI A power supply may include a power converter circuit that is configured to control a magnitude of an output voltage to control the amount of power supplied by the power supply. The power converter circuit may include a half-bridge inverter circuit comprising two switching circuits for generating an inverting voltage from a direct current (DC) voltage, a transformer comprising a primary winding configured to receive the inverting voltage and a secondary winding configured from which the output voltage of the power supply is generated, and an error generating circuit located on the secondary side of the transformer and coupled across the output voltage, where the error generating circuit is configured to generate a signal indicative of the magnitude of the output voltage.The power supply may include an electrical overload protection circuit in series with one of the switching circuits of the half-bridge inverter. The electrical overload protection circuit may be configured to receive a feedback signal indicating a magnitude of an input current on the primary side of the transformer, and control the magnitude of the output voltage to zero volts in response to the magnitude of the input current exceeding a first threshold indicating an electrical overload condition.The power supply may include a control circuit configured to determine a magnitude of a requested power based on the signal indicating the magnitude of the output voltage, and control the magnitude of the output voltage to be zero volts when the magnitude of the requested power is greater than a second threshold and the magnitude of the input current indicated by the feedback signal is less than a third threshold. A power supply may include a power converter circuit, an overload protection circuit, and a control circuit. The power converter circuit may be configured to monitor a magnitude of an output voltage and generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating the magnitude of the output voltage. The overload protection circuit may be configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and disable the power converter circuit in response to the magnitude of the input current indicating an overload condition.The control circuit may be configured to determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage, and disable the power converter circuit when the magnitude of the requested power indicates that the power converter circuit is supplying power to the electrical load and the magnitude of the input current indicated by the first feedback signal is less than a third threshold. PHRQ in / bznz / u / Yi A power supply may include a power converter circuit, an overload protection circuit, and a control circuit. The power converter circuit may be configured to monitor a magnitude of an output voltage and generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating the magnitude of the output voltage. The overload protection circuit may be configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and disable the power converter circuit in response to the magnitude of the input current indicating an overload condition.The control circuit may be configured to determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage, and disable the power converter circuit when the magnitude of the requested power indicates that the power converter circuit is supplying power to the electrical load and the magnitude of the input current indicates that a component of the power converter circuit has failed. A power supply may include a power converter circuit, an overload protection circuit, and a control circuit. The power converter circuit may be configured to monitor a magnitude of an output voltage and generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating the magnitude of the output voltage. The overload protection circuit may be configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and disable the power converter circuit in response to the magnitude of the input current indicating an overload condition.The control circuit may be configured to determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage, and disable the power converter circuit when the magnitude of the requested power and the magnitude of the input current indicate that a component of the regulator circuit has failed. A power supply may include a power converter circuit, an overload protection circuit, and a control circuit. The power converter circuit may be configured to monitor a magnitude of an output voltage and generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating the magnitude of the output voltage. The overload protection circuit may be configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and disable the power converter circuit in response to the magnitude of the current. PHRQ in / bznz / u / Yi input indicating an electrical overload condition. The control circuit may be configured to determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage, and disable the power converter circuit when the magnitudes of the requested power and the input current indicate that a component of a current detection circuit of the power converter circuit has failed. A power supply may include a power converter circuit, an overload protection circuit, and a control circuit. The power converter circuit may be configured to monitor a magnitude of an output voltage and generate a first feedback signal indicating a magnitude of an input power of the power converter circuit and a second feedback signal indicating the magnitude of the output voltage. The overload protection circuit may be configured to receive the first feedback signal indicating the magnitude of the input power of the power converter circuit, and disable the power converter circuit in response to the magnitude of the input power indicating an overload condition.The control circuit may be configured to detect that a regulator circuit component has failed based on the first feedback signal and the second feedback signal, and control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal. The control circuit may be configured to perform closed-loop gate drive based on the second feedback signal. Also contemplated are computer-readable storage media and / or methods comprising instructions that, when executed by one or more control circuits (e.g., a power supply), can be configured to perform one or more of the procedures described herein. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified block diagram of an example power supply that is configured to supply an amount of power. FIG. 2 illustrates an example of an electrical overload protection circuit for a power supply. FIG. 3 illustrates a diagram of a protection system that can be implemented in a power supply. FIG. 4 illustrates a flow diagram of a redundant protection procedure that may be enabled by a power supply control circuit. FIG. 5 is a simplified block diagram of an example control device. PbRQ I n / b7n7 / =l / YI to control the amount of power supplied to an electrical load. FIG. 6 is a simplified schematic diagram of a forward converter for an example LED driver. DETAILED DESCRIPTION FIG. 1 is a simplified block diagram of an exemplary power supply 100 that is configured to supply an amount of power that, for example, can be supplied to an electrical load. In some examples, the power supply 100 may be a constant voltage power supply that supplies an output voltage VOUT (e.g., a direct current (DC) voltage) having a substantially constant magnitude and / or generates a constant bus voltage VBUS. Although primarily described in the context of a constant voltage power supply, in other examples the power supply 100 may be a constant current power supply or a power supply that varies both voltage and current when supplying power to an electrical load.In some embodiments, the power supply 100 may be configured to supply power to a light-emitting diode (LED) driver, a motorized window shade, a communication link, or the like. The power supply 100 may comprise a hot terminal H and a neutral terminal N that are adapted to couple to an alternating current (AC) power supply (not shown) to receive an AC mains voltage VCa. The power supply 100 may comprise a first power converter circuit, such as an AC to DC converter circuit 130, and a second power converter circuit, such as a regulator circuit 140. In addition, the power supply 100 may comprise a control circuit 150, an error generating circuit 160, a memory 170, a communication circuit 180, and / or a low voltage source 190. The AC to DC converter circuit 130 may receive the AC mains voltage Vac and generate a DC bus voltage Vbus (e.g., a DC voltage) via a bus capacitor (not shown). The AC to DC converter circuit 130 may also function as a power factor correction circuit to improve the power factor of the power supply 100 (e.g., to adjust the power factor of the power supply toward a power factor of one). The AC to DC converter circuit 130 may comprise a rectifier circuit (not shown) to generate a rectified voltage from the AC mains voltage Vac. The AC to DC converter circuit 130 may also comprise a boost converter circuit (not shown) configured to receive the rectified voltage and generate the DC bus voltage Vbus as a boosted DC bus voltage.The magnitude of the DC bus voltage Vbus can be greater than a maximum magnitude of the AC main line voltage Vac. Although. PHRQ in / eznz / zi / Yi describes with reference to a boost converter, the AC to DC converter circuit 130 may comprise any power converter circuit suitable for generating an appropriate bus voltage such as, for example, a flyback converter circuit, a single-ended primary inductance converter (SEPIC), a Cuk converter or other suitable power converter circuit. The regulator circuit 140 may receive the bus voltage Vbus and generate the output voltage VOUT (e.g., having a constant magnitude) over a power range. An example of the load regulation circuit 140 may be an isolated half-bridge forward converter. An example of a forward converter that may be used in the power supply 100 is described in greater detail in commonly owned U.S. Patent No. 9,253,829, filed on February 2, 2016, entitled LOAD CONTROL DEVICE FOR A LIGHT-EMITTING DIODE LIGHT SOURCE , the entire disclosure of which is incorporated herein by reference. Alternatively or additionally, the regulator circuit 140 may comprise, for example, a buck converter, a linear regulator, a flyback converter, and / or any other suitable drive circuitry for controlling power supplied by the power supply. The control circuit 150 may be configured to control operation of the AC to DC converter circuit 130 and / or the regulator circuit 140. The control circuit 150 may comprise, for example, a digital controller or any other suitable processing device, such as, for example, a microcontroller, a programmable logic device (PLD), a microprocessor, an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA) that is configured and / or programmable to operate in the manner described herein. The control circuit 150 may receive a Vbus-fb voltage feedback signal from the AC to DC converter circuit 130.The dus voltage feedback signal Vbus-fb may indicate the magnitude of the dus voltage Vbus-. The control circuit 150 may generate a dus voltage control signal Vbus-cntl that may be provided to the AC to DC converter circuit 130 to adjust the magnitude of the dus voltage Vbus-. In some examples, the control circuit 150 may generate a bus voltage control signal Vbus-cntl based on the bus voltage feedback signal Vbus-fb. The power supply 100 may include a gate drive circuit 114, which may generate one or more gate voltages Vg to control one or more switching circuits (e.g., controllable driver devices) of the regulator circuit 140 (e.g., two field effect transistors (FETs) of a half-bridge inverter circuit). The gate voltages Vg may be coupled to gates of the respective switching circuits via the gate drive circuit 114. The control circuit 150 may generate at least one drive signal Vdr to control the gate drive circuit 114 to PfrRQ In / b7n7 / =l / YI generate the gate voltages Vg to render the switching circuits conducting and non-conducting. The control circuit 150 may control at least one drive signal VDr to control the regulator circuit 140 to generate the output voltage VOUT (e.g., to maintain a magnitude of the output voltage VOUT at a constant magnitude). The control circuit 150 may be configured to control the regulator circuit 140 to adjust a magnitude of an output voltage VOUT generated across the output terminals 196a, 196b of the power supply 100 and / or a magnitude of an output current ISOUT of the power supply.The control circuit 150 may adjust an operating frequency fOp and / or a duty cycle DCinv (e.g., a Ton over time) of one or more drive signals VDr to maintain the magnitude of the output voltage VOUT at a constant magnitude (e.g., when the power supply 100 is a constant voltage power supply generating a constant bus voltage Vbus). Although illustrated as a separate circuit, in some embodiments, the gate drive circuit 114 may be part of (e.g., integrated with) the regulator circuit 140. The power supply 100 may include an electrical overload protection circuit 110. In examples where the power supply 100 is a constant voltage power supply, the electrical overload protection circuit 110 may be an overcurrent protection circuit. The electrical overload protection circuit 110 may be configured to receive a first feedback signal Vfbi. The first feedback signal Vfbi may indicate the magnitude of an input current I input to the regulator circuit 140 (e.g., when the power supply 100 is a constant voltage power supply). In examples where the regulator circuit 140 comprises a transformer, the first feedback signal Vfbi may be generated on the primary side of the transformer.For example, the regulator circuit 140 may comprise a sense resistor (e.g., the sense resistor Rsense shown in FIG. 2) in series with a switching circuit of the regulator circuit 140 (e.g., a low-side FET of a half-bridge inverter circuit). In such examples, the regulator circuit 140 may be configured to generate the first feedback signal VFBi in response to a sense current Isense conducted through the sense resistor (e.g., conducted through the low-side FET of the half-bridge inverter). The power overload protection circuit 110 may be configured to disable the power supply 100 (e.g., cause the magnitude of the output voltage Vout to be approximately zero volts) based on the magnitude of the first feedback signal VFBi. For example, the power overload protection circuit 110 may be configured to disable the power supply 100 when an input power Pinput to the circuit PfrRQ In / b7n7 / =l / YI regulator 140 (e.g., based on the first feedback signal Vfbi) exceeding a threshold, such as a power limit threshold Pth-pl. The first feedback signal Vfbi may indicate input current Iin, and the input current Iin may indicate input power Penput (e.g., when power supply 100 is a constant voltage power supply that is, for example, configured to generate a bus voltage Vbus at a constant magnitude at the input of regulator circuit 140). Thus, power overload protection circuit 110 may be configured to turn off power supply 100 when input power Penput (e.g., based on the first feedback signal Vfbi) exceeds the power limit threshold Pth-pl.As described in more detail herein, in some examples, the electrical overload protection circuit 110 may comprise analog circuitry. The Pth-pl power limit threshold may indicate a maximum power threshold for the power supply 100, for example, as defined by standards developed by Underwriters Laboratories (UL) for power supplies, such as for Class 2 power supplies. In some examples, the Pth-pl power limit threshold may be set in the range of 95 to 100 watts. Thus, the Pth-pl power limit threshold may indicate an overload condition (e.g., an electrical overload condition and / or an overcurrent condition). An overload condition may be caused, for example, by a fault in the electrical load that is coupled to the output terminal 196a 196b of the power supply 100 and / or too much load coupled to the output terminal 196a 196b.In a voltage-controlled power supply, the electrical overload condition and the overcurrent condition may be the same, for example, because the AC-to-DC converter circuit 130 may be configured to generate a bus voltage Vbus at a constant magnitude at the input of the regulator circuit 140. The power overload protection circuit 110 may generate a Vor override signal to control the gate drive circuit 114 to control the magnitude of the output voltage Vout to approximately zero volts in response to detecting an overload condition (e.g., when the magnitude of the input power Penin exceeds the power limit threshold Pth-pl). For example, in response to the magnitude of the input power Penin exceeding the power limit threshold Pth-pl (e.g., based on the first feedback signal Vfbi), the power overload protection circuit 110 may provide the Vor override signal to the gate drive circuit 114, which may control one or more switching circuits of the regulator circuit 140 to operate such that the magnitude of the output voltage Vout is controlled to approximately zero volts.For example, the electrical overload protection circuit 110 may be configured to cause a low-side switching circuit (e.g., a field effect transistor (FET) on the side. PfrRQ In / b7n7 / =l / YI low) of the regulator circuit 140 conductive and making a high-side switching circuit (e.g., a high-side FET) of the regulator circuit 140 non-conductive to disable the power supply 100 in response to detecting an electrical overload condition (e.g., in examples where the regulator circuit 140 comprises a half-bridge converter, such as an isolated half-bridge forward converter). The control circuit 150 may receive one or more feedback signals from the regulator circuit 140 (e.g., directly or indirectly from the regulator circuit 140). For example, the control circuit 150 may receive the first feedback signal Vfbi, and as discussed in more detail below, an error signal Vfb2 that is generated based on a second feedback signal VFb2. As noted above, the first feedback signal Vfbi may indicate the magnitude of the input current Iinput of the regulator circuit 140 (e.g., when the power supply 100 is a constant voltage power supply).In some embodiments, the control circuit 150 may be configured to determine a magnitude of the input power Penput of the regulator circuit 140 in response to the magnitude of the input current Iinput (e.g., as determined from the first feedback signal Vfbi, where the first feedback signal VFBi may indicate the sense current Isensing) and the magnitude of the bus voltage Vbus (e.g., as determined from the bus voltage feedback signal Vbus-fb) (e.g., Penput = Vbus Isensing). The control circuit 150 may be configured to detect an overload condition based on the first feedback signal VFBi. For example, the control circuit 150 may be configured to determine the magnitude of the input current Iinput based on the feedback signal Vfbi, and configured to determine the magnitude of the input power Penput of the regulator circuit 140 based on the magnitude of the input current Iinput and the magnitude of the bus voltage Vbus (e.g., as determined from the bus voltage feedback signal Vbus-fb) (e.g., Penput = Vbus Iinput).The control circuit may compare the magnitude of the input power Pent to a threshold, such as the power limit threshold Pth-pl, and control the magnitude of the output voltage Vout to approximately zero volts in response to detecting an overload condition (e.g., when the magnitude of the input power Pent exceeds the power limit threshold Pth-pl). Accordingly, in such embodiments, the control circuit 150 and the power overload protection circuit 110 may be configured to disable the power supply (e.g., de-energize the power supply 100 and / or cause the magnitude of the output voltage Vout to approximately zero volts) when the magnitude of the input power Pent is greater than a threshold, such as the power limit threshold Pth-pl (e.g., the power limit threshold Pth-pl). PbGQ in / bznz / u / Yi example, greater than the UL defined power limit of the power supply). Alternatively or additionally, the control circuit may compare the magnitude of the input current Iinput to a threshold, such as an Ith-cl current limit threshold, and control the magnitude of the output voltage Voutput to approximately zero volts in response to detecting an overload condition (e.g., when the magnitude of the input current Iinput exceeds the Ith-cl current limit threshold). In some examples, the control circuit 150 may trip faster than the electrical overload protection circuit 110 in response to an overload condition. This may be because the control circuit 150 operates faster than the electrical overload protection circuit 100. Alternatively or additionally, the threshold used by the control circuit 150 in detecting an overload condition may be, but does not necessarily have to be, the same as the threshold used by the electrical overload protection circuit 110 (e.g., power limit threshold Pth-pl). For example, in some examples, the threshold used by the control circuit 150 may be set to be slightly lower than the power limit threshold Pth-pl used by the electrical overload protection circuit 110 (e.g., 95 watts as opposed to 96 watts used as the power limit threshold Pth-pl).Accordingly, in such examples, the control circuit 150 may cause the power supply 100 to be turned off before the electrical overload protection circuit 110. The power supply 100 may comprise the error generating circuit 160. In some examples, the error generating circuit 160 may comprise an integrating amplifier circuit, such as a proportional integral (Pl) controller. In some examples, the error generating circuit 160 may be part of the control circuit 150. The error generating circuit 160 may receive a second feedback signal Vfbs from the regulator circuit 140 and a target voltage Vqbjective from the control circuit 150. The second feedback signal Vfb2 may indicate the magnitude of the output voltage Vout of the power supply 100. For example, the error generating circuit 160 may be coupled across the output voltage Vout.In some cases, the error generating circuit 160 may comprise an optocoupler, where an emitter (e.g., photo-emitter) of the optocoupler is located within the regulator circuit 140 on a secondary side of a transformer and a receiver (e.g., photosensor) of the optocoupler is configured to generate the second feedback signal Vfb2. The error generating circuit 160 may receive the target voltage Vqtarget from the control circuit 150. The magnitude of the target voltage Vqtarget may indicate a target magnitude Vouttarget for the output voltage Vout of the power supply 100, for example, when the power supply 100 is a constant voltage power supply. Accordingly, the PHRQ in / bznz / zi / Yi target magnitude Vout-target output voltage Vout may indicate a desired magnitude of the output voltage Vout (e.g., the magnitude of the constant voltage that the power supply 100 is configured to generate). In examples where the power supply 100 is a constant current power supply, the error generating circuit 160 may receive a target voltage Vi-target may indicate a target magnitude Vout-i-target for the output current Iout of the power supply 100, for example. The error generating circuit 160 may generate an error signal Ver and provide the error signal Ver to the control circuit 150. The error generating circuit 160 may be configured to generate the error signal Ver based on the second feedback signal Vfb2 and the target voltage Vtarget. The error signal Ver may indicate the magnitude of a requested input power Prqst of the power supply 100. For example, the requested input power Prqst may represent the amount of power that must be drawn from the bus voltage Vbus to generate the output voltage Vout with the output current Iout. The requested input power Prqst may represent an amount of power to which the input current Iin of the regulator circuit 140 may be adjusted as the control circuit 150 controls the regulator circuit 140 to generate the output voltage Vout with the output current Iout.Furthermore, the error signal Ver may indicate the difference between the actual output voltage Vout (e.g., based on the second feedback signal Vfbi) and the target voltage Vtarget. The magnitude of the target voltage Vtarget may indicate the desired magnitude of the output voltage Vout (e.g., the nominal output voltage of the power supply 100). In some embodiments, the error generating circuit 160 may comprise a proportional-integral-derivative (PID) controller, and the error signal Ver may be indicative of the integration / accumulation of the difference between the target voltage Vtarget and the output voltage Vout over time. The control circuit 150 may regulate the magnitude of the output voltage Vout based on the error signal Ver. For example, the control circuit 150 may perform closed-loop gate drive control based on the error signal Ver. The control circuit 150 may control the magnitude of the output voltage Vout based on the error signal Ver. For example, the control circuit 150 may control drive signals VDr provided to the gate drive circuit 114 to adjust the magnitude of the output voltage Vout to the target magnitude Vout-target output voltage Vout based on the error signal Ver.In addition, when operating as a constant voltage power supply, the control circuit 150 may adjust the operation of the regulator circuit 140 (e.g., adjust the operating frequency fop and / or a duty cycle DCinv (e.g., a time Ton) of the drive signals VDr) to maintain the magnitude of the output voltage Vout at the constant magnitude in response to the error signal. See Examples of load control devices with control of. PfrRQ In / b7n7 / =l / YI closed-loop gated transmission include U.S. Patent Nos. 5,041,763, issued August 20, 1991, U.S. Patent No. 8,466,628, issued June 18, 2013, and U.S. Patent Publication Nos. US 2020 / 0366188, published November 19, 2020, all of which are incorporated herein by reference. In addition, the control circuit 150 may also use the error signal Ver (e.g., and / or the second feedback signal Vfbp) to detect (e.g., infer) a fault condition in the power supply 100. The control circuit 150 may detect a fault condition in the power supply 100, such as a failure of one or more of the components of the power supply 100 (e.g., a component failure), based on the error signal Ver and the first feedback signal VFbi.For example, the control circuit 150 may determine that the error signal Ver indicates that the requested input power Prqst is greater than a requested power threshold Pth-rqst (e.g., indicating that the electrical load is drawing current), but the first feedback signal Vfbi indicates that the input power Pent is less than a threshold, such as a low power threshold Pth-lo (e.g., indicating that the power supply 100 is not providing output power Pout although, for example, the power supply 100 may actually be providing output power Pout).In other words, the control circuit 150 may be configured to detect that the power supply 100 is attempting to supply power (e.g., based on the requested power Prqst) even though the input power Penput of the regulator circuit 140 appears to be low (e.g., approximately zero watts), e.g., based on the first feedback signal Vfbi. In response, the control circuit 150 may determine (e.g., infer) that there may be a fault within one of the components of the power supply 100 (e.g., within the regulator circuit 140 and / or the electrical overload protection circuit 110), and / or the control circuit 150 may cause the magnitude of the output voltage Voutput to be reduced to approximately zero volts.For example, the control circuit 150 may determine (e.g., infer) that there might be a fault within one of the components of the power supply 100 that are used to generate the first feedback signal Vfbi, which e.g., may cause the first feedback signal Vfbi to incorrectly identify the magnitude of the input current Iin (e.g., and incorrectly identify the magnitude of the input current Iin as being less than it actually is). In other words, the fault in one or more components of the power supply 100 may cause the magnitude of the first feedback signal Vfbi to be too low such that the overcurrent protection circuit 110 may not be able to properly operate to prevent the output power from exceeding the output power limit.Accordingly, the control circuit 150 can perform closed-loop gate drive control and detect the failure of. PfrROLn / bZnZ / q / YI a component in the power supply 100 based on the error signal Ver and the first feedback signal VFbi. As noted above, the control circuit 150 may be configured to compare the magnitude of the input power Pent (e.g., as described based on the first feedback signal Vfbi) to the low power threshold Pth-lo. The low power threshold Pth-lo may be less than the power limit threshold Pth-pl. In some examples, the low power threshold Pth-lo may be about 10 watts. The low power threshold Pth-lo may be set such that the magnitude of the input power Pent is greater than the low power threshold Pth-lo when the power supply 100 is providing output power Pout during normal operation, and such that the magnitude of the input power Pent is less than the low power threshold Pth-lo when the power supply 100 is not providing output power Pout during normal operation. The control circuit 150 may compare the magnitude of the requested input power Prqst (e.g., indicated by the error signal Ver) with the requested power threshold Pth-rqst. The requested power threshold Pth-rqst may be determined such that the magnitude of the requested input power Prqst indicated by the error signal Ver exceeds the requested power threshold Pth-rqst whenever the power supply 100 is providing output power Pout to an electrical load during normal operation, and that the magnitude of the requested input power Prqst indicated by the error signal Ver is less than the requested power threshold Pth rost whenever the power supply 100 is not providing output power Pout to the electrical load during normal operation.If the electrical load is drawing current from the power supply 100, the requested input power Prqst may exceed a threshold (e.g., the requested power threshold Pth-rqst). If the electrical load is not drawing current from the power supply 100, the requested input power Prqst may be less than the threshold (e.g., the requested power threshold Pth-rqst). When the power supply 100 is operating properly and supplying power to the electrical load, such as when the magnitude of the input power Pent is greater than the low power threshold Pth-lo but less than the power limit threshold Pth-pl, and the magnitude of the requested input power Prqst indicated by the error signal Ver is greater than the requested power threshold Pth-rqst, the control circuit 150 may be configured to control the regulator circuit 140 to regulate the magnitude of the output voltage Vout toward the target magnitude Vout of the output voltage Vout at the output terminals 196a, 196b of the power supply 100. However, the control circuit 150 may be capable of performing fault detection (e.g., and protection, e.g., by disabling the power supply 100) when the magnitude PfrRQ In / b7n7 / =l / YI of the input power Penput is less than the low power threshold Pth-lo and the magnitude of the requested input power Prqst indicated by the error signal Ver is greater than the requested power threshold Pth-rqst. As noted above, the low power threshold Pth-lo is configured such that the magnitude of the input power Penput should be less than the low power threshold Pth-lo when the power supply 100 is not providing output power Pout during normal operation. Furthermore, the requested power threshold Pth-rqst is configured such that the magnitude of the requested input power Prqst is greater than the requested power threshold Pth-rqst when the power supply 100 is providing output power Pout to an electrical load during normal operation.Thus, if the control circuit 150 determines that the magnitude of the input power Penput is less than the low power threshold Pth-lo, but that the magnitude of the requested input power Prqst is greater than the requested power threshold Pth-rqst, the control circuit 150 may determine (e.g., infer) that one or more components of the power supply 100 are defective. In other words, the first feedback signal Vfbi may indicate that the power supply 100 is not providing power (e.g., although the power supply may, in fact, be providing power), but the error signal Ver may indicate that the power supply 100 is providing power.This may occur when one or more components of the regulator circuit 140 and / or the electrical overload protection circuit 110 are defective (e.g., open or shorted), such as a sense resistor of the regulator circuit 140. In response to a determination that one or more components of the power supply 100 are defective, the control circuit 150 may perform fault protection (e.g., shutting down the power supply 100, for example, causing the magnitude of the output voltage Vout to reduce to approximately zero volts). Thus, in the event that the first feedback signal Vfbi is inaccurate (e.g., because the sense resistor of the regulator circuit 140 is faulty) and the overload protection circuit 110 and / or the control circuit 150 fail to recognize and activate an overload condition, the control circuit 150 may still detect a fault condition (e.g., due to a failure of an internal component) and shut down the power supply 100 (e.g., by controlling the magnitude of the output voltage Vout to approximately zero volts). Accordingly, the power supply 100 may have redundant protection, meaning that if any individual component in the power supply 100 were to fail (e.g., a component of any of the overload protection circuit 110, the control circuit 150, the sense resistor, etc.), the power supply 100 would still be protected from the overload condition (for example, since the control circuit 150 could detect this. PfrRQ In / b7n7 / =l / YI failure and cause the power supply 100 to shut down). Furthermore, since the control circuit 150 is configured to provide component fault detection (e.g., in addition to the overload protection provided by the electrical overload protection circuit 110 and / or the control circuit 150), the power supply 100 need not have two hardware-based electrical overload protection circuits. And, further, since the control circuit 150 is configured to provide a hardware-based protection circuit at the input of the power supply 100, the power supply 100 may not include a voltage drop on the secondary side of the transformer of the regulator circuit 140. For example, the power supply 100 may be used in situations where any voltage drop in the output voltage Vout could have negative effects on downstream loads.As an example, the power supply 100 may be used to control a plurality of lighting loads that are coupled to the power supply 100 using a piece of wire. Since the voltage magnitude may be reduced the further the lighting loads are from the power supply 100 along the piece of wire, the system may be limited as to how many and / or how far the lighting loads may be from the power supply 100 if the power supply 100 were to include a voltage drop on the secondary side of the transformer. Thus, the power supply 100 benefits from being able to provide redundant protection without introducing a voltage drop on the secondary side of the regulator circuit 140 transformer. In some examples, the error signal Ver may indicate the operating period T0P and / or the frequency fop of one or more switching circuits of the regulator circuit 140 (e.g., the operating period Top and / or the operating frequency fop of one or more drive signals). For example, the power supply 100 may be configured such that the switching circuitry of the regulator circuit 140 may be controlled between a minimum operating period Tmin (e.g., which may correspond to 1 watt of output power Pout) and a maximum operating period Tmax (e.g., which may correspond to 200 watts of output power Pout). In such examples, the requested power threshold PTH.rqst may be indicative of an operating period that is exceeded by the power supply 100 during normal operation (e.g., when providing output power Pout). The control circuit 150 may be coupled to the memory 170. The memory 170 may store one or more thresholds and / or operating characteristics of the power supply 100 (e.g., first, second, and / or third threshold, computer-executable instructions for performing the methods described herein, etc.). The memory 170 may be implemented as an external integrated circuit (IC) or as an internal circuit of the control circuit 150. The memory 170 may comprise a computer-readable storage medium or a storage medium. PfrRQ In / b7n7 / =l / YI machine-readable storage that holds computer-executable instructions for performing one or more procedures and / or functions as described herein. For example, memory 170 may comprise computer-executable instructions or machine-readable instructions that when executed by the control circuitry configure the control circuitry to provide one or more portions of the procedures described herein. Control circuitry 150 may access instructions from memory 170 for execution in order to cause control circuitry 150 to operate as described herein, or to operate one or more other devices as described herein. Memory 170 may comprise computer-executable instructions for executing configuration software.For example, one or more thresholds and / or operating characteristics stored in memory 170 may be configured during a configuration procedure of power supply 100. The communication circuit 180 may enable communication via, for example, a wired communication link or a wireless communication link, such as a radio frequency (RF) communication link or an infrared (IR) communication link. The control circuit 150 may be configured to communicate (e.g., transmit and / or receive) communication signals, e.g., wired communication signals and / or wireless communication signals, such as RF signals, via the communication circuit 180. The communication circuit 180 may comprise, for example, an RF transceiver, an RF receiver, an RF transmitter, an infrared (IR) receiver, and / or other suitable wireless communication circuit. The control circuit 150 may be configured to communicate messages (e.g., digital messages) with external devices via the communication circuit 180.In addition, the control circuit 150 may be configured to update the thresholds and / or operating characteristics stored in the memory 170 in response to messages (e.g., digital messages) received via the communication circuit 180. The low voltage supply 190 may receive the bus voltage Vbus and generate a direct current (DC) supply voltage Vcc for powering the power supply circuitry 100. FIG. 2 illustrates an exemplary electrical overload protection circuit 210 of a power supply 200, which may be used like the electrical overload protection circuit 110 of the power supply 100 of FIG. 1. Although not all components of the power supply 200 are illustrated, the power supply 200 may be an exemplary of the power supply 100 of FIG. 1. The power supply 200 may include a regulator circuit 240 (e.g., like the regulator circuit 140 of FIG. 1), which may include a current sense circuit 218 and a drive train circuit 242. The drive train circuit 242 may include power converter components of the regulator circuit 240, such as any combination of one or more switching circuits, a transformer, a rectifier, and / or the like. PbRQ I n / b7n7 / =l / YI Furthermore, the power supply 200 may include a gate drive circuit 214 which may be an example of the gate drive circuit 114. The current sense circuit 218 may include a sense resistor Rsense and a gain and filtering circuit 230. The sense resistor Rsense may be coupled in series with a switching circuit of the drive train circuit 242 (e.g., a low-side FET of a half-bridge inverter circuit of the regulator circuit 242). The sense resistor Rsense may produce a sense signal Vsense in response to a sense current Isense conducted through the sense resistor Rsense (e.g., conducted through the half-bridge inverter). The gain and filtering circuit 230 may be configured to amplify and filter the sense signal Vsense generated across the sense resistor Rsense to generate a first feedback signal Vfbi. The power supply 200 may include a control circuit 250, which may be an example of the control circuit 150 of the power supply 100 of FIG. 1. The control circuit 250 may be configured to receive the first feedback signal Vfbi. The first feedback signal VFBi may indicate the magnitude of an input current Iinput of the regulator circuit 240 (e.g., the drivetrain circuit 242). For example, the control circuit 250 may determine the magnitude of the sense current Idetection of the regulator circuit 240 in response to the first feedback signal Vfbi. The control circuit 250 may use the magnitude of the sense current Idetection to determine the magnitude of the input power Penput of the regulator circuit 240.For example, the sense current Isense may be representative of (e.g., proportional to, such as one-half the magnitude of) the input current Iin of the regulator circuit 240. The control circuit 250 may use the magnitude of the sense current Isense and the magnitude of the bus voltage Vbus (e.g., which may be determined from the bus voltage feedback signal Vbus-fb and / or stored in the memory of the power supply 200) to calculate the input power Pent, (e.g., Pent = Vbus Isense). The power supply 200 may also comprise an error generating circuit 270 that can receive a second feedback signal VFB2 and generate an error signal Vr that is provided to the control circuit 250. The error generating circuit 270 may be an example of the error generating circuit 160 of the power supply 100 of FIG. 1. Furthermore, the second feedback signal VFB2, the error signal Vr, and the target voltage Vtarget illustrated in the power supply 200 of FIG. 2 may be the same as the second feedback signal VFB2, the error signal Vr, and the target voltage Vtarget illustrated in the power supply 100 of FIG. 1. Accordingly, the error generating circuit 270 may be configured to generate the error signal Vr based on ... PbRQ In / b7n7 / =l / YI feedback Vfbs, and provide the error signal See to the control circuit 250.In a manner similar to that described with reference to the control circuit 150 of the power supply 100 of FIG. 1 , the control circuit 250 may regulate the magnitude of the output voltage Vout as a function of the error signal Ver. For example, the control circuit 250 may perform closed-loop gate drive control as a function of the error signal Ver. The control circuit 250 may control the magnitude of the output voltage Vout as a function of the error signal Ver. For example, the control circuit 250 may control drive signals Vdr provided to the gate drive circuit 214 to adjust the magnitude of the output voltage Vout to the target magnitude Vout of the output voltage Vout as a function of the error signal Ver.Furthermore, when operating as a constant voltage power supply, the control circuit 150 may adjust the operation of the regulator circuit 140 (e.g., adjust the operating frequency fop and / or a duty cycle DCinv (e.g., a time Ton) of the drive signals Vdr) to maintain the magnitude of the output voltage Vout at the constant magnitude in response to the error signal Ver. The control circuit 250 may be configured to detect an overload condition based on the first Vfbi feedback signal.For example, the control circuit 250 may be configured to determine the magnitude of the sense current Isense (e.g., and / or the input current Iin) based on the feedback signal Vfbi, and configured to determine the magnitude of the input current Pent of the regulator circuit 140 based on the magnitude of the sense current Isense (e.g., and / or the input current Iin) and the magnitude of the bus voltage VBus. The control circuit 250 may compare the magnitude of the input power Pent to a threshold, such as the power limit threshold Pth-pl, and control the magnitude of the output voltage Vout to approximately zero volts in response to detecting an overload condition (e.g., when the magnitude of the input power Pent exceeds the power limit threshold Pth-pl).Accordingly, in such examples, the control circuit 250 and the power overload protection circuit 210 may be configured to disable the power supply (e.g., de-energize the power supply 200 and / or cause the magnitude of the output voltage Vout to be approximately zero volts) when the magnitude of the input power Pent is greater than a threshold, such as the power limit threshold Pth-pl (e.g., greater than the UL-defined power limit of the power supply).Alternatively or additionally, the control circuit 250 may compare the magnitude of the input current Iinput to a threshold (e.g., an overcurrent threshold) to determine the electrical overload condition (e.g., since the magnitude of the bus voltage VBus may be held substantially constant), and / or the control circuit may calculate the magnitude of the input power Pinput using the magnitude of the. PbROLn / bZnZ / q / YI input current Iinput and the magnitude of the bus voltage Vbus and compare the magnitude of the input power Pinput with a threshold (e.g., an input power threshold) to determine the electrical overload condition. The power supply 200 may also include a hardware protection circuit that is configured to detect an overload condition and shut down the power supply 200. The electrical overload protection circuit 210 may include a low-pass filter circuit 266 and a comparator 260. The low-pass filter circuit 266 may be configured to filter (e.g., apply a low-pass filter to) the first Vfbi feedback signal to generate a first VFBi-Ffiltered feedback signal. The low-pass filter circuit 266 may provide the first VFBi-Ffiltered feedback signal to a first input 262 of the comparator 260.The filter circuit 266 may stabilize the first feedback signal VFbi to generate the first filtered feedback signal VFbi-F because, for example, the filtered first feedback signal VFbi-F may have a more stable DC magnitude that can be accurately compared to the power limit threshold voltage Vth-pl. The electrical overload protection circuit 210 may be configured to disable the power supply 200 in response to detecting an overload condition. In some examples, the overload condition may be caused by a fault in the load that is coupled to the output terminal 196a 196b of the power supply 100 and / or too much load coupled to the output terminal 196a 196b. A second input 264 of comparator 260 may be configured to receive the power limit threshold voltage Vth-pl. The power limit threshold voltage Vth-pl may be generated by control circuit 250, a resistive divider circuit, or other suitable circuit. The power limit threshold voltage Vth-pl may indicate a maximum power threshold for the power supply, for example, as defined by UL standards for power supplies such as Class 2 power supplies (e.g., about 95-100 watts). The power limit threshold voltage Vth-pl may be a fixed value and / or representative of the maximum power threshold for the power supply because, for example, the magnitude of the input voltage (e.g., the input voltage Vin or the bus voltage Vbus) may have a substantially constant magnitude.The power limit threshold Pth-pl used by the control circuit 250 may be the same as, or slightly different from, the power limit threshold voltage Vth-pl used by the comparator 260. For example, in some examples, the power limit threshold Pth-pl may be set to be slightly lower than the power limit threshold voltage Vth-pl (e.g., the power limit threshold Pth-pl is set to 95 watts, while the power limit threshold voltage Vth-pl is set to 96 watts). Accordingly, in such examples, the control circuit 250 may cause the power supply 200 to turn off before the comparator circuit. PfrRQ In / b7n7 / =l / YI overload protection 210. The comparator 260 may generate the nulling signal VOR and provide the nulling signal Vor to the gate drive circuit 214 to turn off the power supply 200 (e.g., to control the magnitude of the output voltage Vout to approximately zero volts) when the magnitude of the filtered first feedback signal Vfbi-f is greater than the magnitude of the power limit threshold voltage Vth-pl. For example, the comparator 260 may compare the magnitude of the filtered first feedback signal Vfbi-f to the power limit threshold voltage Vth-pl, which may be similar to a comparison between the input power Pent (e.g., as represented by the current through the low-side FET) and the power limit threshold Pth-pl performed by the control circuit 210.In some embodiments, comparator 260 may drive the nulling signal Vor low into circuit common when the first filtered feedback signal vfbi-f exceeds the magnitude of the power limit threshold voltage Vth-pl (e.g., which may then cause gate drive circuit 214 to drive one or more of the gate voltages VG low to render the switching circuit (e.g., FET) of drive train circuit 242 non-conducting (e.g., prevent the drive train from conducting inrush current). Thus, the power overload protection circuit 210 may be configured to cause the magnitude of the output voltage Vout to be approximately zero volts when the magnitude of the filtered first feedback signal Vfbi f is greater than the magnitude of the power limit threshold voltage Vth-pl, for example, by controlling the gate override signal Vor provided to the gate drive circuit 214. In response to receiving the override signal Vor, the gate drive circuit 214 may control one or more switching circuits of the drive train circuit 242 to operate so that the magnitude of the output voltage Vout is controlled to approximately zero volts.In some embodiments, the power overload protection circuit 210 may be configured to cause a low-side switching circuit (e.g., a low-side field effect transistor (FET)) of the drive train circuit 242 to be conductive and cause a high-side switching circuit (e.g., a high-side FET) of the drive train circuit 242 to be non-conductive to disable the power supply 200 in response to detecting an electrical overload condition. Accordingly, the power overload protection circuit 210 may be configured to disable the power supply 200 in response to the magnitude of the input power Penput (e.g., represented by the first filtered feedback signal VFbi-f) exceeding the maximum power threshold (e.g., represented by the power limit threshold voltage Vth-pl) as defined by UL standards. PbRQ I n / b7n7 / =l / YI The control circuit 250 may be configured to determine a component failure condition in the regulator circuit 240. The control circuit 250 may be configured to compare the magnitude of the input power Penput (e.g., as described based on the first feedback signal Vfbi) with a low power threshold PTH-LO. The low power threshold Pthlo may be less than the power limit threshold Pth-pl. In some examples, the low power threshold Pth-lo may be about 10 watts.The low power threshold Pth-lo can be set such that the magnitude of the input power Pent is greater than the low power threshold Pth-lo when the power supply 200 provides output power Pout during normal operation, and such that the magnitude of the input power Pent is less than the low power threshold Pth-lo when the power supply 200 does not provide output power Pout during normal operation. The control circuit 250 may be configured to compare the magnitude of a requested input power Prqst (e.g., indicated by the error signal Ver) with a requested power threshold Pth-rqst. The requested power threshold Pth-rqst may be determined such that the magnitude of the requested input power Prqst indicated by the error signal Ver exceeds the requested power threshold Pth-rqst whenever the power supply 200 is providing output power Pout to an electrical load during normal operation, and that the magnitude of the requested input power Prqst indicated by the error signal VEr is less than the requested power threshold Pth-rqst whenever the power supply 200 is not providing output power Pout to the electrical load during normal operation.If the electrical load is drawing current from the power supply 200, the requested input power Prqst may exceed a threshold (e.g., the requested power threshold Pthrqst). If the electrical load is not drawing current from the power supply 200, the requested input power Prqst may be less than the threshold (e.g., the requested power threshold Pth-rqst). When the power supply 200 is operating properly and supplying power to the electrical load, such as when the magnitude of the input power Pent is greater than the low power threshold Pth-lo but less than the power limit threshold Pth-pl, and the magnitude of the requested input power Prqst indicated by the error signal Ver is greater than the requested power threshold Pth-rqst, the control circuit 250 may be configured to control the drive chain circuit 242 to regulate the magnitude of the output voltage Vout toward the target magnitude Vout-target at the output terminals of the power supply 200. However, the control circuit 250 may be capable of performing fail-safe protection (e.g., shutting down the power supply 200, e.g., by causing the magnitude of the output voltage Vout to reduce to approximately zero volts) when the magnitude of the power supply 200 is too low.PHRQ in / bznz / u / Yi input Penput is less than the low power threshold Pth-lo and the magnitude of the requested input power Prqst indicated by the error signal Ver is greater than the requested power threshold Pth-rqst. As noted above, the low power threshold Pth-lo may be configured such that the magnitude of the input power Penput should be less than the low power threshold Pth-lo when the power supply 200 is not providing output power Pout during normal operation. Furthermore, the requested power threshold Pth-rqst may be configured such that the magnitude of the requested input power Prqst is greater than the requested power threshold Pth-rqst when the power supply 200 is providing output power Pout to an electrical load during normal operation.Thus, if the control circuit 250 determines that the magnitude of the input power Penput is less than the low power threshold Pth-lo, but that the magnitude of the requested input power Prqst is greater than the requested power threshold Pth-rqst, the control circuit 250 may determine (e.g., infer) that one or more components of the power supply 200 (e.g., the current sense circuit 218) are defective. In other words, the first feedback signal Vfbi may indicate that the power supply 200 is not providing power, but the error signal Ver may indicate that the power supply 200 is providing power.This may occur when one or more components of the regulator circuit 240 (e.g., the current sense circuit 218) and / or the electrical overload protection circuit 210 are faulty (e.g., open or shorted), such as a sense resistor R of the current sense circuit 218. In response to a determination that one or more components of the power supply 100 are faulty, the control circuit 250 may perform protection (e.g., shutting down the power supply 200, e.g., causing the magnitude of the output voltage Vout to be reduced to approximately zero volts). Thus, in the event that the first feedback signal Vfbi is inaccurate (e.g., because the sense resistor Rdetect of the regulator circuit 140 is faulty) and the electrical overload protection circuit 110 and the control circuit 150 fail to recognize and activate an overload condition, the control circuit 150 may still detect a fault condition (e.g., due to a failure of an internal component) and shut down the power supply 100 (e.g., control the magnitude of the output voltage Vout to approximately zero volts). Accordingly, the power supply 100 may have component failure detection. FIG. 3 illustrates a diagram of a protection system 300 that may be implemented by a combination of hardware (e.g., integrated circuits, such as comparators, logic gates, etc. of a control circuit, such as control circuit 150 and / or control circuit 250) and / or software (e.g., implemented by a processor of a control circuit, such as control circuit 150 and / or control circuit 250). PHRQ in / bznz / u / Yi control circuit 150 and / or control circuit 250) of a power supply (e.g., such as power supply 100 and / or power supply 200). The control circuit processor may comprise computer-executable instructions (e.g., software and / or firmware) that are stored by the control circuit (e.g., stored by control circuit memory) that enable the control circuit to perform all or part of protection system 300. Protection system 300 may include both overload protection and component failure detection logic. In addition to protection system 300, the power supply may include one or more hardware circuits that are configured to perform electrical overload protection (e.g., electrical overload protection circuit 110 of FIG.1 and / or comparator 260 of the electrical overload protection circuit 210 of FIG. 2), for example, independent of the control circuit. The protection system 300 may be responsive to a first feedback signal Vfbi and an error signal Ver, such as those described with reference to FIG. 1 and / or FIG. 2. The first feedback signal Vfbi may indicate a magnitude of an input current Iinput to a regulator circuit of the power supply (e.g., regulator circuit 140 and / or regulator circuit 240), while the error signal Ver may indicate a magnitude of a requested input power Prqst from the power supply (e.g., and may be determined based on a second feedback signal VFb2). The protection system 300 may receive the error signal VFBi from an error generating circuit (e.g., error generating circuit 160 and / or error generating circuit 270), for example, in an analog-to-digital converter (ADC) 310. The protection system 300 may receive the first feedback signal VFBi from the regulator circuit, for example, in an analog-to-digital converter (ADC) 320. The ADCs 310, 320 may be hardware, software, or a combination of hardware and software. The ADCs 310, 320 may be implemented in those situations (e.g., only in those situations) where the protection system 300 needs to convert an analog signal to a digital signal. Thus, although illustrated in a particular position in FIG. 3, in other examples the ADCs 310, 320 may be in different locations (e.g., in addition to or as an alternative to the illustrated positions) and / or may be omitted from the system 300. In examples where a power supply regulator circuit includes one or more switching circuits (e.g., regulator circuit 140 and / or regulator circuit 240), the error signal Ver may indicate an operating period TOp of one or more drive signals generated by the control circuit to control the switching circuits of the regulator circuit. In some examples, the control circuit may set a minimum operating period Tmin and a maximum operating period Tmax of the switching circuits, and the protection system 300 may apply PfrRQ In / b7n7 / =l / YI a scaler 312 to the error signal Ver as a function of the minimum operating period Tmin and the maximum operating period Tmax (e.g., to convert the error signal Ver into an operating period). The protection system 300 may provide the scaled error signal Ver to a gate drive circuit 330, for example, such that the gate drive circuit can perform closed-loop gate control (e.g., as described herein). For example, the error signal Ver may be defined in a range between a minimum magnitude and a maximum magnitude, where the minimum magnitude of the error signal Ver may correspond to (e.g., be mapped to) the minimum operating period Tmin and the maximum magnitude of the error signal Ver may correspond to (e.g., be mapped to) the maximum operating period Tmax.In this way, the protection system 300 can apply the scaler 312 to the error signal Ver based on the minimum operating period Tmin and the maximum operating period Tmax (for example, to convert the error signal Ver into an operating period Top). Furthermore, in some examples, the gate drive circuit 330 may be an example of the gate drive circuit 114 and / or the gate drive circuit 214. In some examples, the error signal Ver may indicate the operating period Top and / or the operating frequency fop of one or more switching circuits of the regulator circuit (e.g., the operating period Top and / or the operating frequency fop of one or more drive signals). For example, the power supply may be configured such that the switching circuits of the regulator circuit may be driven between the minimum operating period Tmin and the maximum operating period Tmax. In such examples, the protection system 300 may apply a scaler 312 to the error signal Ver based on the minimum operating period Tmin and the maximum operating period Tmax, such that the scaled error signal Ver may indicate an operating period of one or more switching circuits of the regulator circuit. The protection system 300 may apply an averaging filter 314 to the scaled error signal Ver, for example, to generate a requested input power Prqst of the regulator circuit. For example, the protection system 300 may also filter the scaled error signal Ver to reduce or prevent the impact of transients on the error signal Ver. In some cases, the filter (e.g., a time constant of the filter) may be configured to 200 ms. In some examples, the requested input power Prqst may indicate an operating period of one or more switching circuits of the regulator circuit. Furthermore, as noted above, the requested input power Prqst may represent an amount of power to which the input current Iin of the regulator circuit may adjust as the control circuit controls the regulator circuit to generate the output voltage Vout with the output current Iout. A comparator 316 may compare the requested input power Prqst (for example, which may indicate an operating period of one or more switching circuits of the regulator circuit) with a PHRQ in / eznz / zi / Yi threshold. In system 300, the threshold is defined in terms of a mean operating period Tmid. The threshold (e.g., the mean operating period Tmid) may be determined such that the operating period indicated by the magnitude of the requested input power Prqst is configured to exceed the second threshold whenever the power supply is supplying power to an electrical load during normal operation. Accordingly, in some examples, the error signal Ver may be scaled based on the minimum operating period Tmin and a maximum operating period Tmax of the switching circuitry and then applied to an average filter such that the result, the requested input power Prqst, indicates a period TRQSt and the second threshold may indicate a period threshold (e.g., the mean operating period Tmid).If the period Trqst indicated by the requested input power Prqst is greater than the second threshold (e.g., if the period indicated by the requested input power Trqst > Tmid), the comparator 316 may pull its output high (e.g., to a logic level "1"), which may be received by a first input of an AND gate 318. Accordingly, the protection system 300 may provide a signal to a first input of an AND gate 318 when the requested input power Prqst indicates that the power supply is supplying power to an electrical load. Therefore, the average operating period Tmid may be configured such that the period Trqst indicated by the requested input power Prqst exceeds the average operating period Tmid when the power supply is supplying power to an electrical load during normal operation.That is, the mean operating period Tmid can be assigned to the magnitude of the error signal Ver that is expected during normal operation. As described herein, the power supply may also regulate the output power Vout based on the error signal Ver. For example, the power supply may perform closed-loop gate drive control in the gate drive circuit 330 based on the error signal Ver (e.g., the gate drive circuit 330 may use the error signal Ver to control one or more gate drive signals to control the magnitude of the output voltage Vout). For example, the power supply may use the error signal Ver as feedback to ensure that the operating period and frequency of the drive signals control the output voltage Vout to a desired, constant output voltage Vout. The protection system 300 may receive the first Vfbi feedback signal from the regulator circuit. As noted above, in some examples, the protection system 300 may generate a digital version of the first Vfbi feedback signal using the 320. The protection system 300 may apply an average filter 322 to the first Vfbi feedback signal to generate a filtered first VFBi feedback signal, for example, to reduce or prevent the impact of transients on the first Vfbi feedback signal. As indicated in PbRQ In / b707 / =l / YI the present, the first feedback signal may indicate an input power Penput to the power supply regulator circuit. The protection system 300 may compare the input power Pent (e.g., indicated by the first feedback signal VFBi) to a first threshold (e.g., the power limit threshold Pth-pl) and to a third threshold (e.g., the low power threshold Pth-lo). For example, a comparator 324 may compare the input power Pent (e.g., indicated by the first feedback signal VFBi) to the power limit threshold Pth-pl. As indicated herein, the power limit threshold Pth-pl may indicate a maximum power threshold for the power supply, e.g., as defined by UL standards for power supplies, such as Class 2 power supplies (e.g., in the range of 95-100 watts). If the input power Penput is greater than the power limit threshold Pth-pl, the comparator 324 may pull its output high (e.g., to a logic level "1"), which may be received by an input of an OR gate 328. If the OR gate 328 receives a logic level "1" at any of the inputs, the OR gate 328 may pull its output high (e.g., to a logic level "1"), which may be received by the gate driving circuit 320 to cause the gate driving circuit 320 to turn off the power supply. For example, the nulling signal Vqr may be an example of the output of the OR gate 328. Accordingly, the protection system 300 may turn off the power supply if the input power Penput exceeds the power limit threshold Pth-pl. For example, in response to the input power Penput exceeding the power limit threshold Pth.pl, the protection system 300 may control one or more gate drive signals, via the gate drive circuit 320, to control the output voltage magnitude to approximately zero volts. Thus, the protection system 300 may be configured to detect an overload condition and cause the power supply to be shut off in response to a detection of an overload condition. The protection system 300 may compare the input power Pen (e.g., indicated by the first feedback signal VFBi) to the third threshold (e.g., the low power threshold Pth-lo). The low power threshold Pth-lo may be less than the power limit threshold Pth-pl. In some examples, the low power threshold Pth-lo may be approximately 10 watts. The low power threshold Pth-lo may be set such that the magnitude of the input power Pent is greater than the low power threshold Pth-lo when the power supply 100 is providing output power Pout during normal operation, and such that the magnitude of the input power Pent is less than the low power threshold Pth-lo when the power supply 100 is not providing output power. PfrRQ In / b7n7 / =l / YI output power Poutput during normal operation. If the comparator 326 determines that the input power Pent is less than the low power threshold Pth-lo, the comparator 326 may pull its output high (e.g., to a logic level "1"), which may be received by a second input of the AND gate 318. Thus, the comparator 326 may pull its output high when the input power Pent indicates that the power supply 100 is not providing output power Pout during normal operation. If the AND gate 318 receives logic "1" levels from both the comparator 316 and the comparator 326, the AND gate 318 may pull its output high (e.g., to a logic "1" level), which may be received by the OR gate 328. As noted above, if the OR gate 328 receives a logic "1" level at either input, the OR gate 328 may pull its output high (e.g., to a logic "1" level) to cause the gate drive circuit 320 to turn off the power supply. Then, if the protection system 300 determines that the input power Penput is less than the low power threshold Pth-lo and the requested input power Prqst is greater than the second threshold (e.g., if the period indicated by the requested input power Prqst > Tmid), the AND gate 318 may receive logic "1" levels on both inputs and, in response, pull its output high (e.g., to a logic "1" level), to cause the OR gate 328 to pull its output high (e.g., to a logic "1" level), to cause the power supply to be turned off.Such instances may be indicative of a fault occurring somewhere within the power supply (e.g., a component failure), because, for example, the input power Pent indicates that the power supply is not supplying output power during normal operation, but the requested input power Prqst indicates that the load is drawing current from the power supply. Thus, the protection system 300 may infer that at least one component of the power supply is faulty (e.g., open or shorted) and, in response, cause the power supply to shut down (e.g., causing the magnitude of the output voltage Vout to be approximately zero volts). The comparison performed at any of 316, 324, or 326 could be implemented using comparators or through control circuit software. Furthermore, the AND gate could be implemented using an analog AND logic gate or through control circuit software. Similarly, the OR gate could be implemented using an analog OR logic gate or through control circuit software. FIG. 4 illustrates a flowchart of a protection method 400 that may be executed by a control circuit of a power supply, such as the control circuit 150 of the power supply 100 of FIG. 1 and / or the control circuit 250 of the power supply 200 shown in FIG. 2. The control circuit may comprise executable instructions. PHRQ in / bznz / zi / Yi by computer (e.g., software and / or firmware) that are stored by the control circuitry (e.g., stored by control circuit memory) that enable the control circuitry to perform the protection procedure 400. The protection procedure 400 may include both overload protection and fault detection logic. The power supply may include the control circuitry that is configured to perform the protection procedure 400 in addition to one or more hardware circuitry that is configured to perform electrical overload protection (e.g., the electrical overload protection circuit 110 of FIG. 1 and / or the electrical overload protection circuit 210 of FIG. 2), for example, independent of the control circuitry. The control circuitry may perform the protection procedure 400 periodically. The control circuit may begin the method 400 at 410. The control circuit may determine a magnitude of an input power Penput at 412. For example, the control circuit may receive a first signal that may indicate input current Iinput from a regulator circuit of the power supply (e.g., regulator circuit 140, 240). In some examples, the first signal may be a feedback signal that is indicative of the magnitude of the input current Iinput, such as the first feedback signal VFBi described with reference to FIGS. 1 and / or 2. In some examples, the control circuit may receive the first signal from the regulator circuit (e.g., a half-bridge inverter circuit), such as in response to a sense current driven through a sense resistor Rsense that is in signal to a low-side FET of a half-bridge inverter circuit of the regulator circuit.The control circuit may be configured to determine a magnitude of a requested input power Prqst at 414. For example, the control circuit may receive a signal that is indicative of the magnitude of the requested input power Prqst, such as the error signal Ver as described with reference to FIGS. 1 and / or 2 , and determine the requested input power Prqst from the signal. For example, the control circuit may receive the error signal Ver (e.g., which may be indicative of the magnitude of the requested input power Prqst) from an error generating circuit (e.g., error generating circuit 160 and / or error generating circuit 260). The error generating circuit may have generated the error signal Ver based on a feedback signal that is generated on the secondary side of a transformer of the regulator circuit (e.g.,, the second feedback signal Vfbs) and a signal (e.g., the target voltage Vqtarget) received from the control circuit indicating a target magnitude Vout-target of the output voltage Vout of the power supply, e.g., when the power supply is a constant voltage power supply. The error signal Ver may indicate a difference between the actual output voltage Vout (e.g.,. PbRQ In / b707 / =l / YI based on the second feedback signal Vfbs) and a target magnitude Vqbjective of the output voltage Vout. The target magnitude Vqbjective of the output voltage Vout may indicate the desired magnitude of the output voltage Vout, which may be based on the constant voltage rating of the power supply 100. Furthermore, it should be appreciated that the control circuit may also use the error signal Ver to regulate the output power Vout (for example, the control circuit 150 may perform closed-loop gate drive control based on the error signal Ver). At 416, the control circuit may compare the magnitude of the input power Penput to a first threshold, such as the power limit threshold Pth-pl. The first threshold may indicate a maximum power threshold for the power supply, for example, as defined by UL standards for power supplies, such as Class 2 power supplies (e.g., 95-100 watts). The first threshold may be indicative of an overload condition (e.g., an electrical overload and / or overcurrent condition). In some examples, the overload condition may be caused by a fault in the load that is coupled to the output terminals (e.g., output terminals 196a and 196b) of the power supply. If the control circuit determines that the magnitude of the input power Penput exceeds the first threshold (e.g., the Pth-pl power limit threshold) at 416, the control circuit may control the regulator circuit (e.g., through a gate drive circuit) to control the magnitude of the output voltage to be approximately zero volts at 418, and the protection method 400 may exit. Thus, the protection method 400 may be configured to cause the control circuit to control the magnitude of the output voltage to be approximately zero volts to prevent an overload (e.g., an overcurrent condition) on the power supply.Furthermore, in some embodiments, the power supply may also include an electrical overload protection circuit (e.g., electrical overload protection circuit 110 and / or electrical overload protection circuit 210) that may compare the magnitude of the first feedback signal Vfbi (e.g., which may indicate input power Penput) to a power limit threshold voltage Vth-pl (e.g., which, similar to the first threshold, may indicate maximum power threshold for the power supply) and cause the power supply to shut down if an overload condition is detected. In some examples, the regulator circuit may include one or more switching circuits and the power supply may include a gate drive circuit (e.g., gate drive circuit 114 and / or gate drive circuit 214) that is configured to provide one or more drive signals to the switching circuit to make the switching circuit conductive and non-conductive. In such examples and in PfrROLn / bZnZ / q / YI response to the magnitude of the input power Penput exceeding the first threshold (e.g., the Pth-pl power limit threshold) at 416, the control circuit may control one or more gate drive signals to control the magnitude of the output voltage to approximately zero volts at 418. If the control circuit determines that the magnitude of the requested input power Penput does not exceed the first threshold at 416, the control circuit may compare the magnitude of the requested input power Prqst to a second threshold, such as the requested power threshold Pth-rqst, at 420. The second threshold may be configured such that the magnitude of the requested input power Prqst is configured to exceed the second threshold whenever the electrical load is drawing current. If the control circuit determines that the magnitude of the requested input power Prqst is not greater than the second threshold at 420, the control circuit may continue to operate in a normal operating mode at 422. Accordingly, if feedback from the secondary side of the transformer (e.g.,, the error signal Ver and / or the requested input power Prqst) indicates that the electrical load is not drawing current, the control circuit may continue to operate in a normal operating mode at 422. In some examples, steps 420 and 424 may be reversed. Alternatively or additionally, in some examples, step 416 may be omitted from the protection procedure 400 so that the control circuit may proceed from 414 directly to 420. However, if the control circuitry determines that the magnitude of the requested input power Prqst is greater than the second threshold at 420, then the control circuitry may compare the magnitude of the input power Pent to a third threshold (e.g., the low power threshold Pth-lo) at 424. The third threshold may be less than the first threshold. In some examples, the third threshold may be approximately 10 watts. The third threshold may be configured such that the magnitude of the input power Pent is greater than the third threshold when the power supply 100 is providing output power Pout during normal operation, and such that the magnitude of the input power Pent is less than the third threshold when the power supply 100 is not providing output power Pout during normal operation. If the control circuit determines that the magnitude of the input power Pent is greater than the third threshold at 424, the control circuit may continue to operate in a normal operating mode at 422. That is, when the magnitude of the requested input power Prqst indicates that the electrical load is drawing current and the magnitude of the input power Pent indicates that the power supply 100 is providing output power Pout during normal operation, the control circuit may continue to operate in a normal operating mode at 422. For example, the control circuit may be configured to control the circuit PbRQ In / b7n7 / =l / YI regulator to provide output current Ioutput from the power supply according to a normal operating mode of the power supply. However, if the control circuit determines that the magnitude of the input power Pent is less than the third threshold at 424, the control circuit may control the regulator circuit to control the magnitude of the output voltage to be approximately zero volts at 418, and the protection procedure 400 may exit. For example, if the magnitude of the input power Pent is less than the third threshold, but the magnitude of the requested input power Prqst is greater than the second threshold, the control circuit may control one or more gate drive signals to control the magnitude of the output voltage to be approximately zero volts.In such cases, the magnitude of the input power Pent may indicate that the regulator circuit is not drawing power from the bus voltage Vbus, but the magnitude of the requested input power Prqst may indicate that the power supply is attempting to generate the output voltage Vout, which may indicate a fault condition in the power supply feedback circuit. The control circuit can thus determine (e.g., infer) that one or more components of the power supply are defective (e.g., open or shorted) and, in response, control the magnitude of the output voltage Vout to be approximately zero volts.Thus, even if a hardware-based overload protection circuit in the power supply fails to recognize and trigger an excessive power overload event (e.g., the first feedback signal VFbi is unreliable), the control circuit may still be able to detect a fault condition (e.g., such as an overload condition and / or component failure) and cause the power supply to shut down (e.g., cause the magnitude of the output voltage Vout to approximately zero volts). Finally, the combination of 420 and 424 may be similar to that realized by the AND gate 318 of FIG. 3. FIG. 5 is a simplified block diagram of an exemplary load control device, e.g., a light-emitting diode (LED) driver 500, for controlling the amount of power supplied to an electrical load, such as, an LED light source 502 (e.g., an LED light engine) and thus the intensity of the light source. The LED light source 502 is shown as a plurality of LEDs connected in series, but may comprise a single LED or a plurality of LEDs connected in parallel or a suitable combination thereof, depending on the particular lighting system. The LED light source 502 may comprise one or more organic light-emitting diodes (OLEDs). The LED driver 500 may comprise an active terminal H and a neutral terminal that are adapted to couple to an alternating current (AC) power source (not shown).The LED driver 500 may be an example of a power supply, such as the power supply 100 of FIG. 1. PbRQ I n / b7n7 / =l / YI The LED driver 500 may comprise a radio frequency interference (REI) filter circuit 510, a rectifier circuit 520, a boost converter circuit 530, a charge regulation circuit 540, a control circuit 550, an error generating circuit 560, a memory 570, a communication circuit 580, and / or a power supply 590. The RFI filter circuit 510 may minimize noise provided on the AC power grid. The rectifier circuit 520 may generate a rectified voltage Vrect.The boost converter 530 may receive the rectified voltage Vrect and generate a boosted direct current (DC) bus voltage Vbus across a bus capacitor Cbus. The boost converter circuit 530 may comprise any suitable power converter circuit for generating an appropriate bus voltage such as, for example, a flyback converter, a single-ended primary inductance (SEPIC) converter, a Cuk converter, or other suitable power converter circuit. The boost converter circuit 530 may function as a power factor correction (PFC) circuit to adjust the power factor of the LED driver 500 toward a power factor of unity. The rectifier circuit 520 and the boost converter circuit 530 may be similar to the rectifier circuit and the boost converter circuit, respectively, of the AC-to-DC converter circuit 130 of FIG. 1. The load regulation circuit 540 may receive the bus voltage Vbus and control the amount of power supplied to the LED light source 502 over a power range. For example, the load regulation circuit may control the intensity of the LED light source 502 between a low intensity Lle (e.g., minimum) (e.g., about 0.1-5%) and a high intensity Lhe (e.g., maximum) (e.g., about 100%). An example of the load regulation circuit 540 may be an isolated half-bridge forward converter circuit. An example of the load control device (e.g., LED driver 500) comprising a forward converter is described in greater detail in commonly owned U.S. Patent No. 9,253,829 filed on February 2, 2016, entitled LOAD CONTROL DEVICE FOR A LIGHT-EMITTING DIODE LIGHT SOURCE , the entire disclosure of which is incorporated herein by reference.The charge regulation circuit 540 may also comprise, for example, a buck converter, a linear regulator, or any suitable LED driver circuit for adjusting the intensity of the LED light source 502. The charge regulation circuit 540 may be an example of a regulator circuit, such as the regulator circuit 140 of the power supply 100 of FIG. 1. The control circuit 550 may be configured to control operation of the boost converter circuit 530 and / or the load regulation circuit 540. An example of the control circuit 550 may be a controller. The control circuit 550 may comprise, for example, a digital controller or any other suitable processing device, such as, for example, a microcontroller, a programmable logic device (PLD), a microprocessor, a specific integrated circuit (IC), or a microcontroller. PbGQ in / bznz / u / Yi application development (ASIC) or a field programmable gate array (FPGA). The control circuit 550 may generate a Vbus-cntl bus voltage control signal that may be provided to the boost converter circuit 530 to adjust the magnitude of the VBus bus voltage. The control circuit 550 may receive a Vbus-fb bus voltage feedback signal from the boost converter circuit 530, which may indicate the magnitude of the VBus bus voltage. The control circuit 550 may generate at least one drive signal such as drive signals Vdri, Vdr2. The drive signals Vdri, Vdr2 may be provided to the charge regulation circuit 540 to adjust the magnitude of a charging voltage Vcharge generated across the LED light source 502 and / or the magnitude of a charging current Icharge conducted through the LED light source 520, for example, to control the intensity of the LED light source 520 to a target intensity Ltarget, which may range from low intensity Lle to high intensity Lhe. The control circuit 550 may adjust an operating frequency fop and / or a duty cycle DCinv (e.g., a Ton over time) of the drive signals Vdri, Vdr2 to adjust the magnitude of the charging voltage Vcharge and / or the charging current Icharge. The control circuit 550 may receive one or more feedback signals from the charge regulation circuit 540. For example, the charge regulation circuit 540 may generate a first feedback signal Vfbi and an error signal Ver (e.g., which may be determined by a feedback signal VFb2). The control circuit 550 may receive the first feedback signal Vfbi from the charge regulation circuit 540 and may be configured to determine a magnitude of an input power Penput of the charge regulation circuit 540 based on the bus voltage feedback signal Vbus-fb and the first feedback signal Vfbi. The LED driver 500 may also comprise an error generating circuit 560 that receives the second feedback signal Vfb2. The error generating circuit 560 may be similar to the error generating circuit 160 and / or the error generating circuit 260. The error generating circuit 560 may receive a second feedback signal Vfb2 from the charge regulation circuit 540 and a target voltage Vqbjective from the control circuit 550. The second feedback signal VFb2 may be indicative of a magnitude of the charging voltage Vcharge and / or a magnitude of the charging current Icharge of the LED driver 500. For example, the error generating circuit 560 may be coupled across the charging voltage Vcharge to measure the magnitude of the charging voltage Vcharge and / or coupled across the charging current Icharge to measure the magnitude of the charging current Icharge.In some instances, the error generating circuit 560 may comprise an optocoupler, where an emitter (e.g., photo-emitter) of the optocoupler is located within the charge regulation circuit 540 on a secondary side of a transformer and a receiver (e.g., photosensor) of the optocoupler is configured to. PbRQ In / b707 / =l / YI generate the second feedback signal Vfb2. The error generating circuit 560 may receive the target voltage Vtarget from the control circuit 550. The magnitude of the target voltage Vtarget may indicate a target charging voltage Vcharge-target and / or a target charging current Icharge-target of the LED driver 500. Accordingly, the target charging voltage Vcharge-target may indicate a desired magnitude of the charging voltage Vcharge and the target charging current Icharge-target may indicate a desired magnitude of the output current Icharge. The error generating circuit 560 may generate an error signal Ver and provide the error signal Ver to the control circuit 550. The error generating circuit 560 may be configured to generate the error signal Ver based on the second feedback signal Vfb2 and the target voltage Vtarget. The error signal Ver may indicate the magnitude of a requested input power Prqst of the LED driver 500. For example,The requested input power Prqst may represent the amount of power that needs to be drawn from the bus voltage Vbus to generate the charging voltage Vcharge at the target charging voltage Vcharge-target and / or generate the charging current Icharge at the target charging current Icharge-target. The requested input power Prqst may represent an amount of power to which the input current Iinput of the charge regulation circuit 540 may be adjusted as the control circuit 550 controls the charge regulation circuit 540 to generate the charging voltage Vcharge at the target charging voltage Vchargetarget and / or generate the charging current Icharge at the target charging current Icharge-target. In addition, the error signal Ver may be indicative of the difference between the actual charging voltage Vcharge (e.g., based on the second feedback signal VFb2) and the target charging voltage Vcharge-target.and / or between the actual charge current Icharge (e.g., based on the second feedback signal Vfb2) and the target charge current Icharge-target. The target charge voltage Vcharge-target may indicate a desired magnitude of the charge voltage Vcharge, and the target charge current Icharge-target may indicate a desired magnitude of the charge current Icharge-. In some examples, the error generating circuit 560 may comprise a proportional-integral-derivative (PlD) controller, and the error signal Vr may be indicative of the integration / accumulation of the difference between the target voltage Vtarget and the output voltage Voutput over time. The control circuit 550 may regulate the charging voltage Vcharge and / or the charging current Icharge based on the error signal Ver. For example, the control circuit 550 may perform closed-loop gate drive control based on the error signal Ver. The control circuit 550 may control the magnitude of the charging voltage Vcharge and / or the magnitude of the charging current Icharge based on the error signal Ver. For example, the control circuit 550 may control the drive signals Vdri, Vdr2 to adjust the magnitude of the charging voltage Vcharge to the voltage PbRQ In / b7n7 / =l / YI of target charge Vtarget-charge to control the amount of power supplied to the electrical load (e.g., to control the intensity of the LED light source 502 to the target intensity Lotarget) in response to the error signal Ver (e.g., using a control loop). Alternatively or additionally, the control circuit 550 may control the drive signals Vdri, Vdrs to adjust the magnitude of the charge current Icharge to the target charge current Itarget-charge to control the amount of power supplied to the electrical load (e.g., to control the intensity of the LED light source 502 to the target intensity Lotarget) in response to the error signal Ver (e.g., using a control loop). Although not illustrated, LED driver 500 may include a gate drive circuit, which may generate drive signals Vdri, VDr2 to control charge regulation circuit 540, such as gate drive circuit 114 and / or gate drive circuit 214. In some examples, the gate drive circuit may be part of charge regulation circuit 540. The LED driver 500 may include an electrical overload protection circuit 512 (e.g., electrical overload protection circuit 110 and / or electrical overload protection circuit 210) that is configured to determine an electrical overload condition, and in response, cause the LED driver 500 to control the magnitude of the charging voltage Vcharge to approximately zero volts and / or control the magnitude of the charging current Icharge to approximately zero amps. The electrical overload protection circuit 512 may be configured to receive the first feedback signal Vfbi indicative of the magnitude of the input current Iinput from the charge regulation circuit 540. For example, the charge regulation circuit 540 may comprise a sense resistor (e.g., the sense resistor Rdetect shown in FIG.6) in series with a switching circuit of the charge regulation circuit 540 (e.g., the low-side FET Q612 of a half-bridge inverter circuit shown in FIG. 6), and the overload protection circuit 512 may receive the first feedback signal Vfbi, which may be indicative of a magnitude of a sense current ¡Sense conducted through the sense resistor RDetect. The overload protection circuit 512 may be configured to cause the magnitude of the charge voltage Vcharge to be approximately zero volts and / or control the magnitude of the charge current Icharge to approximately zero amps when the magnitude of the input power Penput exceeds a threshold, such as a power limit threshold Pthpl (e.g., a maximum power threshold Pmax), for example, by providing an override signal Vor to the charge regulation circuit 540. The control circuit 550 may be coupled to the memory 570. The memory 570 may store one or more thresholds and / or operating characteristics of the LED driver 500 (e.g., the PbRQ In / b707 / =l / YI target intensity Ltarget, the low intensity Lle, the high intensity Lhe, the first, second and / or third thresholds, computer executable instructions for performing the methods described herein, etc.). The memory 570 may be implemented as an external integrated circuit (IC) or as internal circuitry of the control circuit 550. The memory 570 may comprise a computer-readable storage medium or a machine-readable storage medium that retains computer-executable instructions for performing one or more methods and / or functions as described herein. For example, the memory 570 may comprise computer-executable instructions or machine-readable instructions that when executed by the control circuitry configure the control circuitry to provide one or more portions of the methods described herein.The control circuit 550 may access instructions from the memory 570 to be executed in order to cause the control circuit 550 to operate as described herein, or to operate one or more other devices as described herein. The memory 570 may comprise computer-executable instructions for executing configuration software. For example, one or more thresholds and / or operating characteristics stored in the memory 570 may be configured during a configuration procedure of the LED driver 500. The communication circuit 580 may enable communication via, for example, a wired communication link or a wireless communication link, such as a radio frequency (RF) communication link or an infrared (IR) communication link. The control circuit 550 may be configured to communicate (e.g., transmit and / or receive) communication signals, e.g., wired communication signals and / or wireless communication signals, such as RF signals, via the communication circuit 580. The communication circuit 580 may comprise, for example, an RF transceiver, an RF receiver, an RF transmitter, an infrared (IR) receiver, and / or other suitable wireless communication circuit. The control circuit 550 may be configured to communicate messages (e.g., digital messages) with external devices via the communication circuit 580.Furthermore, the control circuit 550 may be configured to update the thresholds and / or operating characteristics stored in the memory 570 in response to messages (e.g., digital messages) received via the communication circuit 580. FIG. 6 is a simplified schematic diagram of a forward converter circuit 640 of an example LED driver 600. The forward converter circuit 640 may be an example of the regulator circuit 140 of the power supply 100 of FIG. 1, the regulator circuit 240 of the power supply 200, and / or an example of the load regulation circuit 540 that may be implemented in the LED driver 500 shown in FIG. 5. Although described as controlling an amount of power supplied to an LED light source 602, the forward converter circuit PbROLn / bZnZ / q / YI direct 640 can be used to control the amount of power supplied to a different type of electrical load(s). The LED driver 600 may include a control circuit 650 (e.g., control circuit 150, control circuit 250, and / or control circuit 550) for controlling the forward converter circuit 640 to adjust a present intensity Lpres of the LED light source 602 in response to an error generating circuit 660. The control circuit 650 may receive a bus voltage feedback signal Vbus-fb that may indicate a magnitude of a bus voltage Vbus received by the forward converter circuit 640. For example, the bus voltage feedback signal Vbus-fb may be generated by a resistive divider including resistors R604, R606. As shown in FIG. 6, the forward converter circuit 640 may comprise a half-bridge inverter circuit including two field effect transistors (FETs) Q610, Q612 for generating a high frequency inverting voltage Vinv from the bus voltage Vbus-. The control circuit 650 may generate at least one drive signal (e.g., drive signals Vdri, VDR2) for causing the FETs Q610, Q612 to conduct and non-conduct. The drive signals Vdri, VDr2 may be coupled to gates of the respective FETs Q610, Q612 via a gate drive circuit 614. The gate drive circuit 614 may be an example of the gate drive circuit 114 and / or the gate drive circuit 214.The forward converter circuit 640 may comprise a transformer 620 and the inverting voltage Vinv may be coupled to the primary winding of the transformer 620 through a DC blocking capacitor C616 (for example, which may have a capacitance of about 0.047 pF), so that a primary voltage Vrri may be generated across the primary winding. The control circuit 650 may be configured to pulse width modulate (PWM) the drive signals Vdri, Vdrs to control a present intensity Lpres of the LED light source 602 toward a target intensity Lqbjective, which may range from a low intensity Lle to a high intensity Lhe. The control circuit 650 may be configured to adjust respective duty cycles DCi, DC2 of the drive signals Vdri, VDr2 to adjust the present intensity Lpres, for example, in response to the first feedback signal VFBi, the second feedback signal VFB2, and / or the bus voltage feedback signal Vbus-fb. The forward converter circuit 640 may comprise a current sense circuit 618, which may include a sense resistor Rsense and a gain and filtering circuit 630. The sense resistor Rsense may be coupled in series with the half-bridge inverter (e.g., in series with the first FET Q610 and the second FET Q612). The current sense circuit 618 may be similar to the current sense circuit 218 of FIG. 2. In addition, the PbRQ In / b7n7 / =l / YI gain and filtering circuit 630 may be similar to gain and filtering circuit 230 shown in FIG. 2. Current sense circuit 618 may generate a first feedback signal Vfbi in response to a sense current Isense conducted through sense resistor Rsense (e.g., conducted across the half-bridge inverter). Control circuit 650 may receive the first feedback signal VFbi and may be configured to determine a magnitude of the sense current Isense from forward converter circuit 640 in response to the first feedback signal Vfbi. Control circuit 650 may use the magnitude of the sense current Isense to determine an input power Penput of forward converter circuit 640.For example, the control circuit 650 may use the magnitude of the VBus voltage (e.g., which may be determined from the Vbus-fb voltage feedback signal and / or stored in the memory 170) to calculate the input power Penput, (e.g., Penput = Vbus Isensing). The secondary winding of the transformer 620 may generate a secondary voltage Vsec and may be coupled to the AC terminals of a bridge rectifier 624 (e.g., a full-wave diode bridge rectifier) ​​to rectify the secondary voltage generated across the secondary winding. The positive DC terminal of the bridge rectifier 624 may be coupled to the LED light source 602. The transformer 620 may provide electrical isolation between the line voltage input of the LED driver 600 (e.g., the hot terminal and the neutral terminal N) and the LED light source 602. The forward converter circuit 640 may also comprise a filter 625, such as a resonant circuit including an inductor and a capacitor connected together. The forward converter circuit 640 may also comprise an optocoupler emitter 626 that is coupled across the charging voltage Vcharge and / or in series with the charging current Icharge. The optocoupler emitter 626 may be configured to generate a second feedback signal VFbz in an optocoupler receiver 628. The second feedback signal VFB2 may be representative of an output power Pout of the LED driver 600. For example, the second feedback signal VFb2 may be representative of a magnitude of the charging current Icharge and / or a magnitude of the charging voltage Vcharge of the LED light source 602. The LED driver 600 may include an electrical overload protection circuit 690 (e.g., electrical overload protection circuit 110 and / or electrical overload protection circuit 210) that is configured to determine an overload condition, and in response, cause the LED driver 600 to control the magnitude of the charging voltage Vcharge to approximately zero volts. The electrical overload protection circuit 690 may be configured to receive a first feedback signal VFBi. The first feedback signal VFBi which may be indicative of the magnitude of a sense current Idetection of the forward converter circuit 640 (e.g., when the LED driver 600 is a PbRQ I n / b7n7 / =l / YI constant voltage controller). The first feedback signal Vfbi can be generated on the primary side of transformer 620. The electrical overload protection circuit 690 may be configured to disable the forward converter circuit 640 (e.g., cause the magnitude of the charging voltage Vcharge to be approximately zero volts) based on the magnitude of the first feedback signal Vfbi. For example, the electrical overload protection circuit 690 may be configured to disable the forward converter circuit 640 when an input power Penput of the forward converter circuit 640 (e.g., based on the first feedback signal Vfbi) exceeds a threshold, such as a power limit threshold Pth-pl. The first feedback signal Vfbi may be indicative of the sense current Isense, and the sense current Isense may be indicative of the input power Penput (e.g., when the LED driver 600 is a constant voltage power supply).Thus, the power overload protection circuit 690 may be configured to disable the forward converter circuit 640 when the input power Penput (e.g., based on the first feedback signal VFBi) exceeds the power limit threshold Pth-pl. As described in more detail herein, in some embodiments, the power overload protection circuit 690 may comprise analog circuitry. The Pth-pl power limit threshold may indicate a maximum power threshold for the LED driver 600, for example, as defined by standards developed by Underwriters Laboratories (UL) for power supplies, such as for Class 2 power supplies. In some examples, the Pth-pl power limit threshold may be set in the range of 95 to 100 watts. Thus, the Pth-pl power limit threshold may indicate an overload condition (e.g., an electrical overload and / or overcurrent condition). An overload condition may be caused, for example, by a fault in the electrical load, such as the LED light source 602, that is coupled to the output terminal of the LED driver 600. The power overload protection circuit 690 may generate a Vor override signal to control the gate drive circuit 614 to control the magnitude of the load voltage Vload (e.g., the output voltage Vout) to approximately zero volts in response to detecting an overload condition (e.g., when the magnitude of the input power Penput exceeds the power limit threshold PTH-PL). For example, in response to the magnitude of the input power Penput exceeding the power limit threshold Pth-pl (e.g., based on the first feedback signal VFBi), the power overload protection circuit 690 may provide the Vor override signal to the gate drive circuit 614, which may control one or more switching circuits of the forward converter. PbRQ In / b707 / =l / YI 640 to operate so that the magnitude of the charging voltage Vcharge is controlled to approximately zero volts. For example, the electrical overload protection circuit 690 may be configured to make the FET Q612 conductive and make the FET Q610 non-conductive to disable the LED driver 600 in response to detecting an electrical overload condition. The control circuit 650 may receive one or more feedback signals from the forward converter 640 (e.g., directly or indirectly from the forward converter 640). For example, the control circuit 650 may receive the first feedback signal Vfbi, and as discussed in more detail below, an error signal Ver that is generated based on a second feedback signal VFB2. As noted above, the first feedback signal VFbi may be indicative of the magnitude of the sense current Idetection of the forward converter circuit 640. In some examples, the control circuit 650 may be configured to determine a magnitude of the input power Penput of the forward converter 640 in response to the magnitude of the sense current Idetection (e.g., as determined from the first feedback signal VFBi) and the magnitude of the bus voltage VBus (e.g.,, determined from the bus voltage feedback signal Vbus-fb) (e.g., Penput = Vbus · Idetection). The control circuit 650 may be configured to detect an overload condition based on the first feedback signal VFBi. For example, the control circuit 650 may be configured to determine the magnitude of the sense current Idetect based on the feedback signal VFBi, and configured to determine the magnitude of the input power Penput of the forward converter 640 based on the magnitude of the sense current Idetect and the bus voltage magnitude VBus (e.g., as determined from the bus voltage feedback signal Vbus-fb) (e.g., Penput = Vbus Idetect).The control circuitry may compare the magnitude of the input power Penput to a threshold, such as the power limit threshold Pth-pl, and control the magnitude of the load voltage Vload to approximately zero volts in response to detecting an overload condition (e.g., when the magnitude of the input power Penput exceeds the power limit threshold Pth-pl). Accordingly, in such embodiments, the control circuitry 650 and the electrical overload protection circuitry 690 may be configured to disable the controller (e.g., de-energize the LED driver 600 and / or cause the magnitude of the load voltage Vload to approximately zero volts) when the magnitude of the input power Penput is greater than a threshold, such as the power limit threshold Pth-pl (e.g., greater than the UL-defined power limit of the power supply).Alternatively or additionally, the control circuit 650 may compare the magnitude of the input current Iinput with a threshold. PHRQ in / bznz / u / Yi (e.g., an overcurrent threshold) to determine the electrical overload condition (e.g., since the magnitude of the bus voltage VBus can be kept substantially constant), and / or the control circuit can calculate the magnitude of the input power Penput using the magnitude of the input current Iinput and the magnitude of the bus voltage VBus and compare the magnitude of the input power Penput to a threshold (e.g., an input power threshold) to determine the electrical overload condition. The threshold used by the control circuit 650 in detecting an overload condition may be, but does not necessarily have to be, the same as the threshold used by the electrical overload protection circuit 690 (e.g., power limit threshold PTH-PL). For example, in some examples, the threshold used by the control circuit 650 may be set to be slightly lower than the power limit threshold Pth-pl used by the electrical overload protection circuit 690 (e.g., 95 watts as opposed to 96 watts used as the power limit threshold Pth-pl). Accordingly, in such examples, the control circuit 650 may cause the LED driver 600 to turn off before the electrical overload protection circuit 690. The power supply 600 may also include an error generating circuit 660. In some examples, the error generating circuit 660 may be part of the control circuit 650. The error generating circuit 160 may receive a second feedback signal VFB2 from the forward converter 640 and a target voltage Vbjective from the control circuit 650. The second feedback signal VFB2 may be indicative of the magnitude of the charging voltage Vcharge of the LED driver 600. For example, the error generating circuit 660 may be coupled across the charging voltage Vcharge.In some embodiments, the error generating circuit 660 may comprise an optocoupler, where an emitter (e.g., photo-emitter) of the optocoupler is located within the forward converter 640 on a secondary side of a transformer, and a receiver (e.g., photosensor) of the optocoupler is configured to generate the second feedback signal VFB2. Furthermore, in some embodiments, the error generating circuit 660 may be located within the forward converter 640, and an output of the error generating circuit 660 (e.g., error signal VEr) may be provided to an emitter of the optocoupler that is located on the secondary side of the transformer, and then the receiver of the optocoupler is configured to receive the error signal Vr from the emitter and provide the error signal Vr to the control circuit 650.In some embodiments, the error generating circuit 660 may comprise an integrating amplifier circuit, such as a proportional-integral (PID) controller. For illustration purposes, in some embodiments, the error generating circuit 660 may comprise a proportional-integral-derivative (PID) controller, and the error signal V may be indicative of the integration / accumulation of the difference between the target voltage Vqtarget and the output voltage Vout. PHRQ in / bznz / u / Yi over time. The error generating circuit 660 may receive the target voltage Vtarget from the control circuit 650. The magnitude of the target voltage Vtarget may indicate a target charging voltage Vtarget-charge of the LED driver 600, for example, when the LED driver 600 is a constant voltage power supply. Accordingly, the target charging voltage Vtarget-charge may indicate a desired magnitude of the charging voltage Vcharge (e.g., the magnitude of the constant voltage that the LED driver 600 is configured to generate). In examples where the LED driver 600 is a constant current power supply, the error generating circuit 660 may receive a target current Vtarget-charge may indicate a target charging voltage Vtarget-charge-i from the LED driver 600, for example. The error generating circuit 660 may generate an error signal Ver and provide the error signal Ver to the control circuit 650. The error generating circuit 660 may be configured to generate the error signal Ver based on the second feedback signal VFb2 and the target voltage Vtarget. The error signal Ver may indicate the magnitude of a requested input power Prqst of the LED driver 600. For example, the requested input power Prqst may represent the amount of power that must be drawn from the bus voltage Vbus to generate the charging voltage Vcharge at the charging current Icharge. The requested input power Prqst may represent an amount of power to which the sense current Idetect of the forward converter 640 may be adjusted as the control circuit 650 controls the forward converter 640 to generate the charging voltage Vcharge at the charging current Icharge.Furthermore, the error signal Ver may indicate the difference between the actual charging voltage Vcharge (e.g., based on the second feedback signal VFb2) and a target charging voltage Vcharge-target. The target charging voltage Vcharge-target may indicate the desired magnitude of the charging voltage Vcharge, which may be based on the constant voltage rating of the LED driver 600. In some examples, the error generating circuit 660 may comprise a proportional-integral-derivative (PID) controller, and the error signal Ver may be indicative of the integration / accumulation of the difference between the target voltage Vtarget and the output voltage Vout over time. The control circuit 650 may regulate the charging voltage Vcharge based on the error signal Ver. For example, the control circuit 650 may perform closed-loop gate drive control based on the error signal Ver. The control circuit 650 may control the magnitude of the charging current Icharge, the magnitude of the charging voltage Vcharge, and / or the output power Pout based on the error signal Ver. For example, the control circuit 650 may control the drive signals VDr provided to the gate drive circuit 614 to adjust the magnitude of the charging voltage Vcharge to the target charging voltage Vcharge-target. PbGQ In / b707 / =l / YI as a function of the error signal Ver. Alternatively or additionally, the control circuit 650 may control the drive signals VDr provided to the gate drive circuit 614 to adjust the magnitude of the charge current Icharge to the target charge current Itarget as a function of the error signal Ver. In addition, and for example, when operating as a constant voltage power supply, the control circuit 650 may adjust operation of the forward converter 640 (e.g., adjust an operating frequency fop and / or a duty cycle DCinv (e.g., a time Ton) of the drive signals Vdr) to maintain the charge voltage Vcharge at the constant magnitude in response to the error signal Ver.Examples of load control devices with closed-loop gate drive control include U.S. Patent No. 5,041,763, issued August 20, 1991, U.S. Patent No. 8,466,628, issued June 18, 2013, and U.S. Patent Publication No. US 2020 / 0366188, published November 19, 2020, all of which are incorporated herein by reference. In addition, the control circuit 650 may also use the error signal Ver (e.g., and / or the second feedback signal VFB2) to detect (e.g., infer) a fault condition in the LED driver 600. The control circuit 650 may detect a fault condition in the LED driver 600, such as a failure in one or more of the components of the LED driver 600 (e.g., a component failure), based on the error signal Ver.For example, the control circuitry 650 may determine that the error signal Ver indicates that the requested input power Prqst is greater than a requested power threshold Pth-rqst (e.g., indicating that the LED light source 602 is drawing current), but the first feedback signal VFBi indicates that the input power Pent is less than a threshold, such as a low power threshold Pth-lo (e.g., indicating that the LED driver 600 is not providing output power Pout). In other words, the control circuitry 650 may be configured to detect that the LED driver 600 is attempting to supply power (e.g., based on the requested power Prqst) even though the input power Pent from the forward converter 640 appears to be low (e.g., approximately zero watts), e.g., based on the first feedback signal VFBi.In response, the control circuit 650 may determine (e.g., infer) that there may be a fault within one of the components of the LED driver 600 (e.g., within the forward converter 640 and / or the overload protection circuit 690), and / or the control circuit 650 may cause the magnitude of the charging voltage Vqarga to be reduced to approximately zero volts. Accordingly, the control circuit 650 may perform closed-loop gate drive control and detect a component failure in the LED driver 600 based on the error signal Ver. As noted above, the control circuit 650 may be configured to compare the PHRQ in / eznz / zi / Yi magnitude of the input power Penput (e.g., as described in terms of the first feedback signal VFBi) with the low power threshold Pth-lq. The low power threshold Pth-lo may be less than the power limit threshold Pth-pl. In some examples, the low power threshold Pth-lo may be about 10 watts. The low power threshold Pth-lo may be set such that the magnitude of the input power Penput is greater than the low power threshold Pth-lo when the LED driver 600 provides output power Pout during normal operation, and such that the magnitude of the input power Penput is less than the low power threshold Pth-lo when the LED driver 600 does not provide output power Pout during normal operation. The control circuit 650 may compare the magnitude of the requested input power Prqst (e.g., indicated by the error signal Ver) with the requested power threshold Pth-rqst. The requested power threshold Pth-rqst may be determined such that the magnitude of the requested input power Prqst indicated by the error signal Ver exceeds the requested power threshold Pth-rqst provided that the LED driver 600 is providing output power Pout to the LED light source 602 during normal operation, and that the magnitude of the requested input power Prqst indicated by the error signal Ver is less than the requested power threshold Pthrqst provided that the LED driver 600 is not providing output power Pout to the LED light source 602 during normal operation.If the LED light source 602 is drawing current from the LED driver 600, the difference between the actual load voltage Vload (e.g., based on the second feedback signal VFB2) and a target magnitude Vqtarget of the output voltage Vout may exceed a threshold (e.g., the requested power threshold Pthrqst). If the LED light source 602 is not drawing current from the LED driver 600, the difference between the actual load voltage Vload (e.g., based on the second feedback signal Vfbs) and the target magnitude Vqtarget of the output voltage Vout may be less than the threshold (e.g., the requested power threshold Pth-rqst). When the LED driver 600 is operating properly and supplying power to the electrical load, such as when the magnitude of the input power Pent is greater than the low power threshold Pth-lo but less than the power limit threshold Pth-pl, and the magnitude of the requested input power Prqst indicated by the error signal Ver is greater than the requested power threshold Pth-rqst, the control circuitry 650 may be configured to control the forward converter 640 to regulate the magnitude of the load voltage Vload toward the target magnitude Vout-target at the output terminals 196a, 196b of the LED driver 600. However, the control circuit 650 may be capable of performing fault protection (e.g., turning off the LED driver 600, for example, by causing the magnitude of the load voltage Vload to reduce to approximately zero volts) when the magnitude of the power supply voltage Vload is exceeded. PfrRQ In / b7n7 / =l / YI input Penput is less than the low power threshold Pth-lo and the magnitude of the requested input power Prqst indicated by the error signal Ver is greater than the requested power threshold Pth-rqst. As noted above, the low power threshold Pth-lo is configured such that the magnitude of the input power Penput must be less than the low power threshold Pth-lo when the LED driver 600 is not providing output power Pout during normal operation. Furthermore, the requested power threshold Pth-rqst is configured such that the magnitude of the requested input power Prqst is greater than the requested power threshold Pth-rqst when the LED driver 600 provides output power Pout to the LED light source 602 during normal operation.Thus, if the control circuit 650 determines that the magnitude of the input power Penput is less than the low power threshold Pth-lo, but that the magnitude of the requested input power Prqst is greater than the requested power threshold Pth-rqst, the control circuit 650 may determine (e.g., infer) that one or more components of the LED driver 600 are defective. In other words, the first feedback signal VFBi may indicate that the LED driver 600 is not providing power, but the error signal Ver may indicate that the LED driver 600 is providing power. This may occur when one or more components of the forward converter 640 and / or the overload protection circuit 110 are defective (e.g., open or shorted closed), such as a sense resistor Rdetect of the forward converter 640.In response to a determination that one or more components of the LED driver 600 are defective, the control circuit 650 may perform fault protection (e.g., turning off the LED driver 600, for example, by causing the magnitude of the output voltage Vload to be reduced to approximately zero volts). Thus, in the event that the first feedback signal VFbi is inaccurate (e.g., because the sense resistor Rdetection of the forward converter 640 is faulty) and the overload protection circuit 690 and control circuit 650 fail to recognize and activate an overload condition, the control circuit 650 may still detect a fault condition (e.g., due to a failure of an internal component) and shut down the LED driver 600 (e.g., by controlling the magnitude of the charging voltage Vcharge to approximately zero volts). Accordingly, the LED driver 600 may have redundant protection, meaning that if any individual component in the LED driver 600 were to fail (e.g., a component of any of the overload protection circuit 690, the control circuit 650, the sense resistor Rdetection, etc.), the LED driver 600 would still be protected from the overload condition (for example, since the control circuit 650 could detect this fault and cause the LED driver 600 to turn off). The control circuit 650 may be coupled to the memory (not shown). The memory may PbGQ I n / b7n7 / =l / YI store one or more thresholds and / or operating characteristics of the LED driver 600 (e.g., target intensity Ltarget, low intensity Lle, high intensity Lhe, first, second, and / or third thresholds, computer-executable instructions for performing the methods described herein, etc.). The memory may be implemented as an external integrated circuit (IC) or as internal circuitry of the control circuit 650. The memory may comprise a computer-readable storage medium or a machine-readable storage medium that retains computer-executable instructions for performing one or more methods and / or functions as described herein.For example, the memory may comprise computer-executable instructions or machine-readable instructions that, when executed by the control circuitry, configure the control circuitry to provide one or more portions of the procedures described herein. The control circuitry 650 may access the instructions from the memory to be executed in order to cause the control circuitry 650 to operate as described herein, or to operate one or more other devices as described herein. The memory may comprise computer-executable instructions for executing configuration software. For example, one or more thresholds and / or operating characteristics stored in the memory may be configured during a configuration procedure of the LED driver 600. The LED driver 600 may include a communication circuit (not shown), which may enable communication via, for example, a wired communication link or a wireless communication link, such as a radio frequency (RF) communication link or an infrared (IR) communication link. The control circuit 650 may be configured to communicate (e.g., transmit and / or receive) communication signals, for example, wired communication signals and / or wireless communication signals, such as RF signals, via the communication circuit. The communication circuit may comprise, for example, an RF transceiver, an RF receiver, an RF transmitter, an infrared (IR) receiver, and / or other suitable wireless communication circuit. The control circuit 650 may be configured to communicate messages (e.g., digital messages) with external devices via the communication circuit.Furthermore, the control circuit 650 may be configured to update the thresholds and / or operating characteristics stored in the memory in response to messages (e.g., digital messages) received via the communication circuit. Although described with reference to a power supply for an electrical load, and sometimes more specifically to an LED driver, one or more embodiments described herein may be used with other electrical loads and / or load control devices. For example, one or more of the embodiments described herein may be realized by a variety of load control devices that are configured to control a variety of types of loads. PfrROLn / bZnZ / q / YI electrical load, such as, for example, an LED driver for driving an LED light source (e.g., an LED light engine); a screw-in luminaire including a dimmer circuit and an incandescent or halogen lamp; a screw-in luminaire including a ballast and a compact fluorescent lamp; a screw-in luminaire including an LED driver and an LED light source; a dimmer circuit for controlling the intensity of an incandescent lamp, a halogen lamp, a low-voltage electronic lighting load, a low-voltage magnetic lighting load, or other lighting load; an electronic switch, controllable circuit breaker, or other switching device for turning electrical loads or appliances on and off;A plug-in load control device, a controllable electrical receptacle, or a controllable power strip for controlling one or more plug-in electrical loads (e.g., coffee makers, heaters, other appliances, and the like); a motor control unit for controlling a motor load (e.g., a ceiling fan or exhaust fan); a drive unit for controlling a motorized window treatment or projection screen; motorized interior or exterior blinds; a thermostat for a heating and / or cooling system; a temperature control device for controlling a heating, ventilation, and air conditioning (HVAC) system; an air conditioner; a compressor; an electric baseboard heater controller; a controllable damper; a humidity control unit; a dehumidifier; a water heater; a pool pump; a refrigerator; a freezer;a television or computer monitor; a power supply; an audio system or amplifier; a generator; an electrical charger, such as an electric vehicle charger; and an alternative energy controller (e.g., a solar, wind, or thermal energy controller). A single control circuit may be coupled to and / or adapted to control multiple types of electrical loads in a load control system.

Claims

1. A power supply for controlling an amount of power supplied by the power supply, the power supply comprising: a power converter circuit configured to control a magnitude of an output voltage and configured to generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating a magnitude of the output voltage; an electrical overload protection circuit configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and control the magnitude of the output voltage to be approximately zero volts in response to the magnitude of the input current exceeding a first threshold indicating an electrical overload condition;and a control circuit configured to: determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage; and control the magnitude of the output voltage to be approximately zero volts when the magnitude of the requested power is greater than a second threshold and the magnitude of the input current is less than a third threshold.

2. The power supply of claim 1, wherein the control circuit is further configured to control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal indicating the magnitude of the output voltage.

3. The power supply of claim 1, further comprising: an error generating circuit external to the control circuit, the error generating circuit configured to receive the second feedback signal indicating the magnitude of the output voltage of the power converter circuit and a target voltage indicating a desired magnitude of the output voltage, the error generating circuit configured to generate a signal indicating the magnitude of the requested power in response to the target voltage and the second feedback signal; wherein the control circuit is configured to receive the signal indicating the magnitude of the requested power from the error generating circuit, and configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

4. The power supply of claim 3, wherein the control circuit is configured PbRQ In / b707 / =l / YI to control the power converter circuit to adjust the magnitude of the output voltage toward the desired magnitude in response to the signal indicating the magnitude of the requested power.

5. The power supply of claim 3, wherein the control circuit is configured to: compare the magnitude of the input current to an input current threshold to detect an electrical overload condition; and control the magnitude of the output voltage to approximately zero volts in response to detecting the electrical overload condition.

6. The power supply of claim 3, wherein the control circuit is configured to: determine an input power of the power converter circuit based on the magnitude of the input current and the magnitude of the input voltage of the power converter circuit; compare the magnitude of the input power of the power converter circuit with an input power threshold to detect an electrical overload condition; and control the magnitude of the output voltage to be approximately zero volts in response to the detection of the electrical overload condition.

7. The power supply of claim 1, wherein the control circuit is further configured to: receive the second signal indicating the magnitude of the output voltage of the power converter circuit; and determine the magnitude of the requested power from the second feedback signal.

8. The power supply of claim 7, wherein the control circuit comprises an error generating circuit configured to receive the signal indicating the magnitude of the output voltage of the power converter circuit and generate a signal indicating the magnitude of the requested power; and wherein the control circuit is configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

9. The power supply of claim 7, wherein the control circuit is configured to sample the signal indicating the magnitude of the output voltage to determine the magnitude of the output voltage and determine the requested power based on the determined magnitude of the output voltage.

10. The power supply of claim 1, wherein the control circuit is further configured to: compare the magnitude of the requested power with the second threshold; and compare the magnitude of the input current indicated by the first feedback signal PHRQ in / bznz / u / Yi 53 with the third threshold.

11. The power supply of claim 1, wherein the control circuit is further configured to control the magnitude of the output voltage to be approximately zero volts when the first feedback signal is greater than a fourth threshold indicating an overcurrent condition.

12. The power supply of claim 11, wherein the first threshold is greater than the fourth threshold.

13. The power supply of claim 1, wherein the control circuit is configured to operate in a normal operating mode when the magnitude of the input current indicated by the first feedback signal is greater than the third threshold, but less than the first threshold, and the magnitude of the requested power is greater than the second threshold.

14. The power supply of claim 1, wherein the control circuit is configured to generate a drive signal to control the power converter circuit to adjust an average magnitude of the output voltage; and wherein the control circuit is configured to control the drive signal to adjust the magnitude of the output voltage to be approximately zero volts when the magnitude of the requested power is greater than the second threshold and the magnitude of the input current indicated by the first feedback signal is less than the third threshold.

15. The power supply of claim 1, wherein the second threshold is determined such that the magnitude of the requested power is configured to exceed the second threshold when the power supply is supplying power during a normal operating mode.

16. The power supply of claim 15, wherein the signal indicating the magnitude of the output voltage indicates an operating period of one or more switching circuits of the power converter circuit, and wherein the second threshold is a threshold of the operating period.

17. The power supply of claim 1, wherein the first threshold comprises a maximum power threshold, and the third threshold comprises a low power threshold that is less than the maximum power threshold.

18. The power supply of claim 1, wherein the power converter circuit comprises a half-bridge converter circuit.

19. The power supply of claim 1, wherein the power converter circuit comprises: a half-bridge inverter circuit comprising two switching circuits for generating an inverting voltage; a transformer comprising a primary side configured to receive the inverting voltage and a secondary side configured to provide the output voltage of the power supply; and an error generating circuit located on the secondary side of the transformer and coupled across the output voltage, wherein the error generating circuit is configured to generate the signal indicating the magnitude of the output voltage.

20. The power supply of claim 1, wherein the power supply is configured to filter and amplify a detection signal to generate the first feedback signal.

21. The power supply of claim 20, further comprising: a sense resistor, wherein the input current is conducted through the sense resistor to generate the sense signal through the sense resistor.

22. The power supply of claim 1, further comprising: an AC to DC converter circuit configured to receive an alternating current (AC) voltage and generate the DC voltage; wherein the control circuit is configured to provide a bus voltage control signal to the AC to DC converter circuit to adjust a magnitude of the DC voltage, and receive a bus voltage feedback signal indicating the magnitude of the DC voltage from the AC to DC converter circuit.

23. A power supply for controlling an amount of power supplied from the power supply, the power supply comprising: a power converter circuit configured to control a magnitude of an output voltage to control the amount of power supplied by the power supply, the power converter circuit comprising: a half-bridge inverter circuit comprising two switching circuits for generating an inverting voltage from a direct current (DC) voltage; a transformer comprising a primary winding configured to receive the voltage from the inverter and a secondary winding configured from which the output voltage of the power supply is generated;and an error generating circuit located on the secondary side of the transformer and coupled across the output voltage, wherein the error generating circuit is configured to generate a signal indicative of a magnitude of the output voltage; an electrical overload protection circuit in series with one of the switching circuits of the half-bridge inverter, the electrical overload protection circuit configured to receive a feedback signal indicative of a magnitude of an inrush current on the primary side of the transformer, and control the magnitude of the output voltage to be zero volts in response to the magnitude of the inrush current exceeding a first threshold indicating an electrical overload condition; and a control circuit configured to: determine a magnitude of a requested power based on the signal indicative of the magnitude of the output voltage;controlling the magnitude of the output voltage to be zero volts when the magnitude of the requested power is greater than a second threshold and the magnitude of the input current indicated by the feedback signal is less than a third threshold; 24. The power supply of claim 23, wherein the control circuit is further configured to control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current Iout or the output voltage Vout based on the signal indicating the magnitude of the output voltage.

25. The power supply of claim 23, wherein the control circuit is configured to generate a drive signal to control the power converter circuit to adjust an average magnitude of the output voltage; and wherein the control circuit is configured to control the drive signal to adjust the magnitude of the output voltage to be zero volts when the magnitude of the requested power is greater than the second threshold and the magnitude of the input current indicated by the first feedback signal is less than the third threshold.

26. The power supply of claim 25, wherein the drive signal is configured to control a switching frequency of the switching circuitry of the half-bridge inverter to adjust the average magnitude of the output voltage.

27. The power supply of claim 25, wherein the switching circuitry of the half-bridge inverter comprises a high-side field effect transistor (FET) and a low-side FET; and wherein the electrical overload protection circuit comprises a sense resistor in series with the low-side FET.

28. The power supply of claim 23, wherein the error generating circuit comprises an optocoupler.

29. The power supply of claim 23, wherein the error generating circuit comprises an output inductor, wherein the power converter circuit further comprises a winding magnetically coupled to and electrically isolated from the output inductor, the power converter circuit configured to generate the signal indicating the magnitude of the output voltage across the winding.

30. The power supply of claim 23, wherein the power supply is configured to filter and amplify a detection signal to generate the PbROLn / bZnZ / q / YI feedback signal 56 to prevent false triggering.

31. The power supply of claim 23, wherein the control circuit is configured to provide a bus voltage control signal to an AC-to-DC converter circuit to adjust a magnitude of the DC voltage; and wherein the control circuit is configured to receive a bus voltage feedback signal from the AC-to-DC converter circuit indicating the magnitude of the DC voltage.

32. The power supply of claim 23, wherein the electrical overload protection circuit is configured to provide single fault detection for the power supply.

33. The power supply of claim 23, wherein the power converter circuit does not include a voltage step-down on the secondary side of the transformer.

34. The power supply of claim 23, wherein the power converter circuit comprises a half-bridge converter circuit.

35. The power supply of claim 23, further comprising: an AC to DC converter circuit configured to receive an alternating current (AC) voltage and generate the DC voltage.

36. The power supply of claim 35, wherein the AC to DC converter circuit comprises a boost converter, a buck converter, or a flyback converter.

37. The power supply of claim 23, wherein the control circuit is further configured to control the magnitude of the output voltage to be approximately zero volts when the feedback signal is greater than a fourth threshold indicating an overcurrent condition.

38. The power supply of claim 37, wherein the first threshold is greater than the fourth threshold.

39. The power supply of claim 37, further comprising: an optocoupler, wherein an emitter of the optocoupler is located within the power converter circuit on a secondary side of a transformer, and wherein a receiver of the optocoupler is configured to provide the second feedback signal to the error generating circuit.

40. The power supply of claim 37, further comprising: an optocoupler, wherein an emitter of the optocoupler is located within the power converter circuit on a secondary side of a transformer, and wherein a receiver of the optocoupler is configured to provide the signal indicating the magnitude of the output voltage to the control circuit.

41. A power supply for controlling an amount of power supplied by the power supply, the power supply comprising: a power converter circuit configured to control a magnitude of an output voltage and configured to generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating a magnitude of the output voltage; an electrical overload protection circuit configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and deactivate the power converter circuit in response to the magnitude of the input current indicating an electrical overload condition;and a control circuit configured to: determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage; and disable the power converter circuit when the magnitude of the requested power indicates that the power converter circuit is supplying power to the electrical load and the magnitude of the input current indicated by the first feedback signal is less than a third threshold; 42. The power supply of claim 41, wherein the control circuit is further configured to control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal indicating the magnitude of the output voltage.

43. The power supply of claim 41, further comprising: an error generating circuit external to the control circuit, the error generating circuit configured to receive the second feedback signal indicating the magnitude of the output voltage of the power converter circuit and a target voltage indicating a desired magnitude of the output voltage, the error generating circuit configured to generate a signal indicating the magnitude of the requested power in response to the target voltage and the second feedback signal; wherein the control circuit is configured to receive the signal indicating the magnitude of the requested power from the error generating circuit, and configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

44. The power supply of claim 43, wherein the control circuit is configured to control the power converter circuit to adjust the magnitude of the output voltage toward the desired magnitude in response to the signal indicating the magnitude of the requested power PbRQ In / b707 / =l / YI 58.

45. The power supply of claim 43, wherein the control circuit is configured to: compare the magnitude of the input current with an input current threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

46. ​​The power supply of claim 43, wherein the control circuit is configured to: determine an input power of the power converter circuit based on the magnitude of the input current and the magnitude of the input voltage of the power converter circuit; compare the magnitude of the input power of the power converter circuit to an input power threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

47. The power supply of claim 41, wherein the control circuit is further configured to: receive the second signal indicating the magnitude of the output voltage of the power converter circuit; and determine the magnitude of the requested power from the second feedback signal.

48. The power supply of claim 47, wherein the control circuit comprises an error generating circuit configured to receive the signal indicating the magnitude of the output voltage of the power converter circuit and generate a signal indicating the magnitude of the requested power; and wherein the control circuit is configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

49. The power supply of claim 41, wherein the control circuit is further configured to disable the power converter circuit when the first feedback signal is greater than a fourth threshold indicating an overcurrent condition.

50. The power supply of claim 41, wherein the control circuit is configured to operate in a normal operating mode when the input current indicated by the first feedback signal is greater than the third threshold, but less than the first threshold, and the magnitude of the requested power is greater than the second threshold.

51. A power supply for controlling an amount of power supplied by the power supply, the power supply comprising: a power converter circuit configured to control a magnitude of an output voltage and configured to generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating a magnitude of the output voltage; an electrical overload protection circuit configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and deactivate the power converter circuit in response to the magnitude of the input current indicating an electrical overload condition;and a control circuit configured to: determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage; and disable the power converter circuit when the magnitude of the requested power indicates that the power converter circuit is supplying power to the electrical load and the magnitude of the input current indicates that a component of the power converter circuit has failed.

52. The power supply of claim 51, wherein the control circuit is further configured to control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal indicating the magnitude of the output voltage.

53. The power supply of claim 51, further comprising: an error generating circuit external to the control circuit, the error generating circuit configured to receive the second feedback signal indicating the magnitude of the output voltage of the power converter circuit and a target voltage indicating a desired magnitude of the output voltage, the error generating circuit configured to generate a signal indicating the magnitude of the requested power in response to the target voltage and the second feedback signal; wherein the control circuit is configured to receive the signal indicating the magnitude of the requested power from the error generating circuit, and configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

54. The power supply of claim 53, wherein the control circuit is configured to control the power converter circuit to adjust the magnitude of the output voltage toward the desired magnitude in response to the signal indicating the magnitude of the requested power. PbRQ In / b7n7 / =l / YI 55. The power supply of claim 53, wherein the control circuit is configured to: compare the magnitude of the input current with an input current threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

56. The power supply of claim 53, wherein the control circuit is configured to: determine an input power of the power converter circuit based on the magnitude of the input current and the magnitude of the input voltage of the power converter circuit; compare the magnitude of the input power of the power converter circuit to an input power threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

57. The power supply of claim 51, wherein the control circuit is further configured to: receive the second signal indicating the magnitude of the output voltage of the power converter circuit; and determine the magnitude of the requested power from the second feedback signal.

58. The power supply of claim 57, wherein the control circuit comprises an error generating circuit configured to receive the signal indicating the magnitude of the output voltage of the power converter circuit and generate a signal indicating the magnitude of the requested power; and wherein the control circuit is configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

59. The power supply of claim 51, wherein the control circuit is further configured to disable the power converter circuit when the magnitude of the input current indicated by the first feedback signal is greater than a fourth threshold indicating an overcurrent condition.

60. The power supply of claim 51, wherein the control circuit is configured to operate in a normal operating mode when the magnitude of the input current indicated by the first feedback signal is greater than the third threshold, but less than the first threshold, and the magnitude of the requested power is greater than the second threshold.

61. A power supply for controlling an amount of power supplied by the power supply, the power supply comprising: a power converter circuit configured to control a magnitude of an output voltage and configured to generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating a magnitude of the output voltage; an electrical overload protection circuit configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and deactivate the power converter circuit in response to the magnitude of the input current indicating an electrical overload condition;and a control circuit configured to: determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage; and disable the power converter circuit when the magnitude of the requested power and the magnitude of the input current indicate that a component of the regulator circuit has failed.

62. The power supply of claim 61, wherein the control circuit is further configured to control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal indicating the magnitude of the output voltage.

63. The power supply of claim 61, further comprising: an error generating circuit external to the control circuit, the error generating circuit configured to receive the second feedback signal indicating the magnitude of the output voltage of the power converter circuit and a target voltage indicating a desired magnitude of the output voltage, the error generating circuit configured to generate a signal indicating the magnitude of the requested power in response to the target voltage and the second feedback signal; wherein the control circuit is configured to receive the signal indicating the magnitude of the requested power from the error generating circuit, and configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

64. The power supply of claim 63, wherein the control circuit is configured to control the power converter circuit to adjust the magnitude of the output voltage toward the desired magnitude in response to the signal indicating the magnitude of the requested power.

65. The power supply of claim 63, wherein the control circuit is configured to: compare the magnitude of the input current to an input current threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

66. The power supply of claim 63, wherein the control circuit is configured to: determine an input power of the power converter circuit based on the magnitude of the input current and the magnitude of the input voltage of the power converter circuit; compare the magnitude of the input power of the power converter circuit with an input power threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

67. The power supply of claim 61, wherein the control circuit is further configured to: receive the second signal indicating the magnitude of the output voltage of the power converter circuit; and determine the magnitude of the requested power from the second feedback signal.

68. The power supply of claim 67, wherein the control circuit comprises an error generating circuit configured to receive the signal indicating the magnitude of the output voltage of the power converter circuit and generate a signal indicating the magnitude of the requested power; and wherein the control circuit is configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

69. The power supply of claim 61, wherein the control circuit is further configured to disable the power converter circuit when the magnitude of the input current indicated by the first feedback signal is greater than a fourth threshold indicating an overcurrent condition.

70. The power supply of claim 61, wherein the control circuit is configured to operate in a normal operating mode when the magnitude of the input current indicated by the first feedback signal is greater than the third threshold, but less than the first threshold, and the magnitude of the requested power is greater than the second threshold.

71. A power supply for controlling an amount of power supplied by the power supply, the power supply comprising: a power converter circuit configured to control a magnitude of an output voltage and configured to generate a first feedback signal indicating a magnitude of an input current of the power converter circuit and a second feedback signal indicating a magnitude of the output voltage; an electrical overload protection circuit configured to receive the first feedback signal indicating a magnitude of the input current of the power converter circuit, and deactivate the power converter circuit in response to the magnitude of the input current indicating an electrical overload condition;and a control circuit configured to: determine a magnitude of a requested power based on the second feedback signal indicating the magnitude of the output voltage; and deactivate the power converter circuit when the magnitudes of the requested power and the input current indicate that a component of a current detection circuit of the power converter circuit has failed.

72. The power supply of claim 71, wherein the control circuit is further configured to control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal indicating the magnitude of the output voltage.

73. The power supply of claim 71, further comprising: an error generating circuit external to the control circuit, the error generating circuit configured to receive the second feedback signal indicating the magnitude of the output voltage of the power converter circuit and a target voltage indicating a desired magnitude of the output voltage, the error generating circuit configured to generate a signal indicating the magnitude of the requested power in response to the target voltage and the second feedback signal; wherein the control circuit is configured to receive the signal indicating the magnitude of the requested power from the error generating circuit, and configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

74. The power supply of claim 73, wherein the control circuit is configured to control the power converter circuit to adjust the magnitude of the output voltage toward the desired magnitude in response to the signal indicating the magnitude of the requested power.

75. The power supply of claim 73, wherein the control circuit is configured to: compare the magnitude of the input current with an input current threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

76. The power supply of claim 73, wherein the control circuit is configured to: determine an input power of the power converter circuit based on the magnitude of the input current and the magnitude of the input voltage of the power converter circuit; compare the magnitude of the input power of the power converter circuit with an input power threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

77. The power supply of claim 71, wherein the control circuit is further configured to: receive the second signal indicating the magnitude of the output voltage of the power converter circuit; and determine the magnitude of the requested power from the second feedback signal.

78. The power supply of claim 77, wherein the control circuit comprises an error generating circuit configured to receive the signal indicating the magnitude of the output voltage of the power converter circuit and generate a signal indicating the magnitude of the requested power; and wherein the control circuit is configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

79. The power supply of claim 71, wherein the control circuit is further configured to disable the power converter circuit when the magnitude of the input current indicated by the first feedback signal is greater than a fourth threshold indicating an overcurrent condition.

80. The power supply of claim 71, wherein the control circuit is configured to operate in a normal operating mode when the magnitude of the input current indicated by the first feedback signal is greater than the third threshold, but less than the first threshold, and the magnitude of the requested power is greater than the second threshold.

81. A power supply for controlling an amount of power supplied by the power supply, the power supply comprising: a power converter circuit configured to control a magnitude of an output voltage and configured to generate a first feedback signal indicating a magnitude of an input power of the power converter circuit and a second feedback signal indicating a magnitude of the output voltage; an electrical overload protection circuit configured to receive the first feedback signal indicating the magnitude of the input power of the power converter circuit, and deactivate the power converter circuit in response to the magnitude of the input power indicating an electrical overload condition;and a control circuit configured to: detect that a component of the regulator circuit has failed based on the first feedback signal and the second feedback signal; and control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal.

82. The power supply of claim 81, wherein the control circuit is further configured to control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal.

83. The power supply of claim 81, further comprising: an error generating circuit external to the control circuit, the error generating circuit configured to receive the second feedback signal indicating the magnitude of the output voltage of the power converter circuit and a target voltage indicating a desired magnitude of the output voltage, the error generating circuit configured to generate a signal indicating the magnitude of the requested power in response to the target voltage and the second feedback signal; wherein the control circuit is configured to receive the signal indicating the magnitude of the requested power from the error generating circuit, and configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

84. The power supply of claim 83, wherein the control circuit is configured to control the power converter circuit to adjust the magnitude of the output voltage toward the desired magnitude in response to the signal indicating the magnitude of the requested power.

85. The power supply of claim 83, wherein the control circuit is configured to: compare the magnitude of the input power with an input power threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

86. The power supply of claim 83, wherein the control circuit is configured to: determine an input power of the power converter circuit based on the magnitude of the input power and the magnitude of the input voltage of the power converter circuit; compare the magnitude of the input power of the power converter circuit with an input power threshold to detect an electrical overload condition; and disable the power converter circuit in response to detecting the electrical overload condition.

87. The power supply of claim 81, wherein the control circuit is further configured to: receive the second signal indicating the magnitude of the output voltage of the power converter circuit; and determine the magnitude of the requested power from the second feedback signal.

88. The power supply of claim 87, wherein the control circuit comprises an error generating circuit configured to receive the signal indicating the magnitude of the output voltage of the power converter circuit and generate a signal indicating the magnitude of the requested power; and wherein the control circuit is configured to determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

89. The power supply of claim 81, wherein the control circuit is further configured to disable the power converter circuit when the magnitude of the input power indicated by the first feedback signal is greater than a fourth threshold indicating an overcurrent condition.

90. The power supply of claim 81, wherein the control circuit is configured to operate in a normal operating mode when the magnitude of the input power indicated by the first feedback signal is greater than the third threshold, but less than the first threshold, and the magnitude of the requested power is greater than the second threshold.

91. The power supply of claim 81, wherein the control circuit is configured to perform closed-loop gate driving based on the second feedback signal.

92. At least one computer-readable storage medium comprising executable instructions that, when executed by the at least one control circuitry, cause the at least one control circuitry to: determine a magnitude of a requested power based on a feedback signal, PbRQ In / b707 / =l / YI 67 where the second feedback signal indicates a magnitude of an output voltage of a power converter circuit; and control the magnitude of the output voltage to be approximately zero volts when the magnitude of the requested power is greater than a first threshold and a magnitude of an input current of the power converter circuit is less than a second threshold.

93. At least one computer-readable storage medium of claim 92, wherein, when executed by the at least one control circuit, the at least one computer-readable storage medium further causes the at least one control circuit to: receive the signal indicating the magnitude of the requested power from an error generating circuit; and determine the magnitude of the requested power based on the signal indicating the magnitude of the requested power.

94. At least one computer-readable storage medium of claim 93, wherein, when executed by the at least one control circuit, the at least one computer-readable storage medium further causes the at least one control circuit to: control the power converter circuit to adjust the magnitude of the output voltage toward the desired magnitude in response to the signal indicating the magnitude of the requested power.

95. At least one computer-readable storage medium of claim 93, wherein, when executed by the at least one control circuit, the at least one computer-readable storage medium further causes the at least one control circuit to: compare the magnitude of the input current to an input current threshold to detect an electrical overload condition; and control the magnitude of the output voltage to be approximately zero volts in response to detecting the electrical overload condition.

96. At least one computer-readable storage medium of claim 93, wherein, when executed by the at least one control circuit, the at least one computer-readable storage medium further causes the at least one control circuit to: determine an input power of the power converter circuit based on the magnitude of the input current and the magnitude of the input voltage of the power converter circuit; compare the magnitude of the input power of the power converter circuit to an input power threshold to detect an over-power condition; and control the magnitude of the output voltage to be approximately zero volts in response to detecting the electrical overload condition.

97. At least one computer-readable storage medium of claim 92, wherein, when executed by at least one control circuit, the at least one computer-readable storage medium further causes the at least one control circuit to: receive a second feedback signal indicating a magnitude of the output voltage of the power converter circuit; and determine a magnitude of the requested power from the second feedback signal.

98. At least one computer-readable storage medium of claim 97, wherein, when executed by the at least one control circuit, the at least one computer-readable storage medium further causes the at least one control circuit to: control one or more drive signals provided to a gate drive circuit to adjust the magnitude of an output current or the output voltage based on the second feedback signal indicative of the magnitude of the output voltage.

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