122 results about "DC-to-DC converter" patented technology

An electronic controller is configured to adjust the duty cycle, between a respective pairs of semiconductor switches of the primary converter of a direct-current-to-direct-current converter based on reducing or minimizing one or more of the first estimated line-to-line DC offset voltage, the second estimated line-to-line DC offset voltage, and the third estimated line-to-line DC offset voltage. Further, the electronic controller is configured determines duty cycle adjustments based on oversampling (e.g., enhanced data processing with interpolation) of smoothed or integrated representation of the first estimated line-to-line DC offset voltage, the second estimated line-to-line DC offset voltage, and the third estimated line-to-line DC offset voltage.

A system includes: an alternating current (AC) to direct current (DC) converter (AC-DC converter) including a bulk capacitor, the AC-DC converter connectable to a line voltage; a DC to DC converter (DC-DC converter) connected to the AC-DC converter, the DC-DC converter including: one or more transformers having a secondary side connectable to a battery, and a bridge rectifier connected to the secondary side of the one or more transformers, the bridge rectifier including a bridge rectifier switch; and one or more controllers configured to control an operation of the bridge rectifier switch to control a voltage of the bulk capacitor.

A system comprises: a high voltage (HV) direct current (DC) to DC converter (HVDC) including: one or more transformers; a bridge driver connected to a primary side of the one or more transformers; and one or more bridge rectifiers connected to a secondary side of the one or more transformers, the one or more bridge rectifiers including one or more bridge rectifier switches; a low voltage (LV) DC to DC converter (LVDC) connected to the HVDC; and a boost converter including: an inductor connected to the one or more bridge rectifier switches; and one or more boost configuration switches operable, in combination with the one or more bridge rectifier switches, to configure the boost converter into each of a bypass configuration and a boost configuration, to regulate a voltage at the LVDC.

The invention relates to an over-current protection circuit of a synchronous step-down DC-DC converter, and the over-current protection circuit is characterized in that one end of the over-current protection circuit is connected with one end of a power conversion circuit, the other end of the over-current protection circuit is connected with a power supply, and the other end of the power conversion circuit is connected with the power supply; and the overcurrent protection circuit is used for controlling the power tube to be closed when overcurrent occurs in the power tube in the power conversion circuit, and controlling the power tube to be opened after a preset duration. The overcurrent protection circuit can solve the overcurrent problem of the power conversion circuit.

An electric vehicle (EV) charging station for fast charging (e.g. 5 to 15 minutes) an electric vehicle (EV). The EV charging station can be configured to charge multiple EVs and multiple conventional vehicles at the same time. The EV charging station can include a power source, an electric reservoir receiving power from the power source, an AC to DC power converter for receiving AC power from the power source and converting the AC power to DC power for supplying DC power to the electric reservoir, an EV charger receiving DC power from the electric reservoir; and a first DC to DC converter receiving DC power from the electrical reservoir and converting the DC power to DC power suitable for charging the electrical vehicle.

DC-to-DC converter for multiport charging system and method thereof. For example, a DC-to-DC converter for a multiport charging system, the multiport charging system including a plurality of output ports that correspond to a plurality of DC-to-DC converters respectively, the plurality of DC-to-DC converters including the DC-to-DC converter, the plurality of output ports including a first output port that corresponds to the DC-to-DC converter, the DC-to-DC converter including: a load detector configured to: detect whether the first output port that corresponds to the DC-to-DC converter is connected to any load; and among the plurality of output ports, determine a first number of one or more output ports that are connected to one or more loads respectively; and a generator configured to: if the first output port that corresponds to the DC-to-DC converter is connected to a load, generate a first voltage as an output voltage for the first output port.

A vehicle including a Direct Current-to-Direct Current (DC to DC) converter, a low-voltage battery, a memory and a processor is disclosed. The DC to DC converter may be configured to convert a high voltage electric power to a low voltage electric power, and the low-voltage battery may be configured to be charged by the DC to DC converter via the low voltage electric power. The memory may be configured to store inputs associated with a vehicle user. The processor may be configured to determine that a trigger event has occurred, and estimate a future vehicle usage based on the inputs responsive to determining that the trigger event has occurred. The processor may further control a charging operation of the low-voltage battery by the DC to DC converter based on the future vehicle usage.

A system includes: an alternating current (AC) to direct current (DC) converter (AC-DC converter), the AC-DC converter connectable to a line voltage; and a DC to DC converter (DC-DC converter) connected to the AC-DC converter, the DC-DC converter including: a high voltage buck-boost converter having a secondary side connectable to a high voltage battery; a low voltage buck-boost converter having a secondary side connectable to a low voltage battery; and one or more transformers having a primary side connected to the AC-DC converter, a secondary side connected to a primary side of the high voltage buck-boost converter, and a tertiary side connected to a primary side of the low voltage buck-boost converter.

The application discloses a DC-DC converter circuit based on over-temperature protection threshold adjustment, and an over-temperature detection module comprises: a first transistor circuit, the base of the transistor is connected with the reference voltage VBG output end of a band gap reference module, a positive temperature coefficient voltage proportional to absolute temperature is generated; a voltage dividing circuit input end is connected with the positive temperature coefficient voltage output end, the positive temperature coefficient voltage is divided to generate a detection voltage; a second transistor circuit, the base of the transistor is connected with the detection voltage output end, an over-temperature protection signal OTP is output to shut down the main circuit of the converter; an adjustment resistance circuit receives a digital adjustment signal; the digital adjustment signal changes the voltage dividing ratio of the positive temperature coefficient voltage divided to the detection voltage by controlling the equivalent resistance value of the adjustment resistance circuit; the change direction of the voltage dividing ratio is opposite to the change direction of the reference voltage VBG caused by adjustment. The application significantly improves the accuracy, consistency and overall reliability of the over-temperature protection threshold.

A battery manager for a battery is disclosed. The battery manager comprises a battery charger configured to provide a first output voltage in a first voltage range, a buck-boost direct current to direct current (DC to DC) converter switchably coupled to the battery charger, and a bypass line switchably coupled between the battery charger and the battery for bypassing the buck-boost DC to DC converter. The battery manager further comprises a controller configured to electrically route the first output voltage of the battery charger to the battery via the bypass line when a voltage requirement of the battery is within the first voltage range. The controller is further configured to electrically route the first output voltage of the battery charger to the battery via the buck-boost DC to DC converter when the voltage requirement of the battery is outside the first voltage range.

Discussed is a power control apparatus and a power control method. The power control apparatus may monitor an output power of a power conversion system (PCS), detect changes in a voltage of a DC link, and control output power of a battery by comparing the output power of the PCS with a rated power of the battery, and thus, provides stabilization of an energy storage system by preventing voltage fluctuations in the DC link.

A battery manager for a battery is disclosed. The battery manager comprises a battery charger configured to provide a first output voltage in a first voltage range, a buck-boost direct current to direct current (DC to DC) converter switchably coupled to the battery charger, and a bypass line switchably coupled between the battery charger and the battery for bypassing the buck-boost DC to DC converter. The battery manager further comprises a controller configured to electrically route the first output voltage of the battery charger to the battery via the bypass line when a voltage requirement of the battery is within the first voltage range. The controller is further configured to electrically route the first output voltage of the battery charger to the battery via the buck-boost DC to DC converter when the voltage requirement of the battery is outside the first voltage range.

Embodiments of a power management unit for a device, a power management unit for a biomedical patch, and a biomedical patch are disclosed. In an embodiment, a power management unit for a battery-less device includes: a thermoelectric energy generator (TEG) harvester; a near field communication (NFC) collector; a direct current (DC)-DC converter, the DC-DC converter coupled between the TEG collector and the NFC collector; a first switch and a second switch, wherein the first switch and the second switch are coupled between the DC-DC converter and the NFC collector; a central control unit (CCU) coupled between the first switch and the second switch and configured to control the DC-DC converter; and a capacitor coupled between the CCU, the first switch, and the second switch, and a load. Other embodiments are also disclosed.

A charge recycling circuit in an integrated circuit DC-DC converter having two power MOSFETs, the charge recycling circuit comprising a single inductor and recycling MOSFET switches arranged and sized such that when one of the two power MOSFETs is turning off, its gate capacitance charges are transferred to the single inductor, stored in the single inductor and then transferred directly to the gate of the other power MOSFET to turn it on.

In accordance with one embodiment, a driver is configured to adjust a phase offset of driver control signals between corresponding switches of the same phase of the primary converter and the secondary converter consistent with the target power transfer and the estimated electromagnetic circuit inductance (e.g., comprising a leakage inductance), to minimize thermal energy dissipated from the direct-current-to-direct current converter or its transformer for the sampling time interval.

The present disclosure provides a converter including a primary stage having a plurality of primary stage switches, a secondary stage having a plurality of secondary stage switches and a capacitor, and a controller that isolates the secondary stage from a second battery, and that controls switching of the plurality of primary stage switches and the plurality of secondary stage switches to provide a plurality of bursts of energy from a first battery to the capacitor to pre-charge the capacitor to a threshold voltage, wherein after an initial burst of the plurality of bursts having an initial duration, a subsequent burst of the plurality of bursts provided has a duration equal to a duration of a preceding burst plus a time period based on a voltage of the first battery.

A DC-DC converter (1) for controlling DC output power by controlling the ON / OFF of a high-side switch (11), the DC-DC converter being provided with a control unit (2) for adjusting the OFF time of the high-side switch (11) in order to control the output power, the control unit (2) being configured so that the ON time of the high-side switch (11) is inversely proportional to the input / output voltage difference (Ei-Eo), and the ON time of the high-side switch (11) is inversely proportional to the input / output voltage difference (Ei-Eo). An input / output voltage difference (Ei-Eo) is a difference between an input voltage (E1) to the DC-DC converter (1) and an output voltage (Eo) from the DC-DC converter (1).

An isolated DC-DC converter including n conversion circuit units is provided. In each conversion circuit unit, a first connection node is formed between two switching components of a first primary bridge arm, and a second connection node is formed between two electronic components of a second primary bridge arm. A third connection node is formed between two switching components of a first secondary bridge arm, and a fourth connection node is formed between two switching components of a second secondary bridge arm. A first coupling inductor and A first capacitor are serially coupled between the first and third connection nodes. A second coupling inductor and a second capacitor are serially coupled between the second and fourth connection nodes. In the n conversion circuit units, the primary circuit units are electrically connected in series or in parallel, and the secondary circuit units are electrically connected in parallel or in series correspondingly.

A hybrid sensing circuit for generating a control signal for controlling a switching direct-current-to-direct-current (DC-to-DC) converter where (i) the switching DC-to-DC converter includes a first inductor-capacitor (LC) filter and (ii) a second LC filter is electrically coupled between a local output node and a remote output node of the switching DC-to-DC converter. The hybrid sensing circuit includes (a) one or more first amplifiers configured to generate a first amplifier output signal proportional to a dynamic voltage at the local output node, (b) one or more second amplifiers configured to generate a second amplifier output signal proportional to a difference between (i) a desired output voltage of the switching DC-to-DC converter and (ii) an output voltage of the switching DC-to-DC converter at the remote output node, and (c) summing circuitry configured to generate a control signal based on a sum of the first and second amplifier output signals.

DC-DC converter with an output-side storage capacitor arrangement for providing an operating voltage for an inductive load and for at least one further electronic circuit and / or electronic component of a vehicle electronics, wherein the storage capacitor arrangement is connected to the DC-DC converter via a reverse-biased diode (6) and the output-side storage capacitor arrangement is connected to a parallel circuit consisting of an electrolytic capacitor (1), a ceramic capacitor (2) and a circuit arrangement is formed with a series connection of a hybrid electrolytic capacitor (3) and a suppressor diode (4) and a resistor (5) connected in parallel to the hybrid electrolytic capacitor (3), wherein the hybrid electrolytic capacitor (3) has a lower series resistance than the electrolytic capacitor (1) and a larger capacitance than the ceramic capacitor (2), so that in the event of energy being fed back from the inductive load into the storage capacitor arrangement, the hybrid electrolytic capacitor (3) absorbs a large proportion of the energy and thus prevents a voltage increase at an output terminal above a value at which connected components can be destroyed, wherein the output terminal is the cathode terminal of the diode (6) and the inductive load can be connected to the output terminal.

The invention relates to a particularly efficient topology (12) comprising a DC-DC converter (16) that converts an input voltage (UE) with a positive (phiE+) and a negative (phiE-) input potential into an intermediate circuit voltage (UZK) with a positive (phiZK+) and a negative (phiZK-) intermediate circuit potential, and an inverter (24) that converts the intermediate circuit voltage (UZK) into an output voltage (UA), wherein the DC-DC converter (16) is configured to adjust the negative intermediate circuit potential (phiZK-) relative to the positive (phiE+) and / or negative (phiE-) input potential. The invention further relates to a particularly efficient powertrain (10) and a particularly efficient vehicle (28).

To suppress uneven voltage load.SOLUTION: A DC-DC converter (1) includes a transformer (Tr) in which a first winding connected to each of the AC-side terminal pairs of a plurality of AC-DC conversion circuits (11, 12) constituting a first AC-DC conversion circuit group (10) and a second winding connected to each of the AC-side terminal pairs of AC-DC conversion circuits (21, 22) constituting a second AC-DC conversion circuit group (20) are wound on a common core, and DC-side terminal pairs for inputting and outputting DC power of the AC-DC conversion circuits constituting the first AC-DC conversion circuit group are connected in series.SELECTED DRAWING: Figure 1

An electronic device includes a power plane arranged to receive input power and to distribute the input power to a plurality of blade board assemblies. Each of the blade board assemblies include one or more DC to DC converter circuits that convert the received power into power that is delivered to a processor. Metallic bus bars are attached to each blade board assembly to conduct high current from the power plane, across the blade board assembly and to the DC to DC converter circuits. After DC to DC conversion by the DC to DC converter circuits, additional bus bars are used to conduct the high current across the blade board assembly to the processor, which may be attached to a motherboard.

The present application relates to the technical field of power conversion, and discloses a DC-DC converter output voltage control circuit, method and converter. The DC-DC converter output voltage control circuit includes a digital subtraction unit, an addition and subtraction counting unit, a decoding and storage unit, a digital-to-analog conversion unit, a feedback control unit and a switching conversion unit. The digital subtraction unit can calculate the magnitude of a preset target output voltage value and the stored value of the decoding and storage unit, and control the counting state of the addition and subtraction counting unit according to the calculation result. The decoding and storage unit can store the counting result of the addition and subtraction counting unit. The digital-to-analog conversion unit can convert the stored value of the decoding and storage unit into a reference voltage. The feedback control unit can control the output voltage of the switching conversion unit according to the reference voltage and the output feedback voltage, which can improve the flexibility of output voltage control and realize the soft start, soft shutdown and soft regulation of the output voltage of the DC-DC converter.

A method for operating a DC-DC converter (300) which contains a buck-boost converter (10) with an inductor (L) and a plurality of switching elements (S1-S4), comprises measuring a current (I) flowing through the inductor (L) and performing the following method steps: a) comparing the current with a first threshold current value (Ival), b) setting the buck-boost converter into a first switching state (BOOST ON) at the beginning of a switching cycle if the current is below the first threshold current value, or setting the buck-boost converter into a second switching state (BOOST OFF, BUCK ON) at the beginning of the switching cycle if the current is not below the first threshold current value, c) if the buck-boost converter is operated in the first switching state, comparing the current with the first threshold current value (Ival) and setting the buck-boost converter into the second switching state as soon as the current reaches the first threshold current value, d) if the buck-boost converter is operated in the second switching state, comparing the current with a second threshold current value (Ipk) which is greater than the first threshold current value and setting the buck-boost converter into the third switching state (BUCK OFF) as soon as the current reaches the second threshold current value, and repeating steps a) to d) after expiry of the predetermined period duration (Tc).

The present application relates to a kind of direct current-direct current converters, comprising: first capacitor;First switch, second switch, third switch and fourth switch, which are connected in series between the first electrode and the second electrode of first capacitor;Second capacitor, which is connected to the connection node of first switch and second switch and the connection node of third switch and fourth switch;Inductance, which is connected to the connection node of second switch and third switch;And controller, which performs pulse width modulation control.In the event of a failure of second capacitor, based on the comparison result between the first detection voltage measured as output voltage and the target output voltage of direct current-direct current converter, the direct current-direct current converter performs pulse width modulation control, so that first switch and second switch enter the same state and third switch and fourth switch enter the same state.

Limiting circuitry is disclosed. In one example, the limiting circuitry provides limited electric current and / or limited electric voltage for electrically testing at least one device under test. The limiting circuitry comprises a plurality of DC-DC-converters being connected in parallel to each other, each being provided with an electric input DC voltage and each being configured for providing a converted electric output current to be forwarded to an assigned one of electric contacts for contacting the at least one device under test. A control mechanism is configured for controlling the DC-DC-converters for limiting the electric output current and / or an electric output voltage which relates to said electric output current.

　The invention relates to an LLC DC-DC converter for use in a micro-inverter system, which is capable of providing a double or quadruple gain of voltage. The LLC DC-DC converter comprises: a full-bridge circuit; a resonant transformer having a primary winding on one end thereof, and secondary and tertiary windings on the other end, wherein the start of said primary winding is connected to the output of said full-bridge circuit; a rectifier circuit connected to said other end of the resonant transformer; and two tapping switches connected to a DC-AC inverter in a way such that when the first tapping switch is turned on, the LLC DC-DC converter provides a double gain of voltage, and when the second tapping switch is turned on, the LLC DC-DC converter provides a quadruple gain of voltage.

Hybrid DC-DC converters are described. One aspect is an electrical circuit configured to perform a DC-DC voltage conversion between an input voltage and an output voltage. The electrical circuit may include a first electrical network connected between an input node and an output node. The first electrical network may include eight switching transistors, with six of the eight switching transistors being cross-coupled. The electrical circuit may further include a second electrical network connected between a switching node and a ground node, and six flying capacitors connected between the first electrical network and the second electrical network. The electrical circuit may also include an inductor connected between the switching node and the output node. In an aspect, the DC-DC voltage conversion involves a repeated cycle of four distinct switching system states, with each switching system state being associated with a distinct electric current path through the electrical circuit.