Power supply control circuit and power supply device

Abstract

The application provides a power supply control circuit and a power supply device, wherein the power supply control circuit comprises a master control unit, a plurality of switch units, a plurality of charging units and a plurality of output ports; the master control unit is connected with the plurality of switch units respectively; each switch unit is connected with one charging unit and one output port, and the charging unit and the output port connected with each switch unit are connected; the output port is used for connecting with a load; the master control unit is used for turning on one of the plurality of switch units connected with the load; when the switch unit connected with the load is in the on state, a first charging voltage is conducted to the corresponding output port and the charging unit through the switch unit; when the switch unit connected with the load is in the off state, the corresponding charging unit outputs a second charging voltage and conducts the second charging voltage to the corresponding output port.

Description

Technical Field

[0001] This application relates to the field of power control technology, and in particular to a power supply control circuit and power supply device. Background Technology

[0002] In current power supply solutions, a power supply can only meet the output of one voltage state. When more than two different voltages need to be output, multiple sets of DC-DC converter circuits are often required to convert one voltage into multiple outputs. However, the design of multiple sets of DC-DC converter circuits results in higher costs and greater losses. Utility Model Content

[0003] To address the existing technical problems, this application provides a power supply control circuit and power supply device with lower cost and lower losses.

[0004] In a first aspect, embodiments of this application provide a power supply control circuit applied to a power supply device, comprising: a main control unit, multiple switching units, multiple charging units, and multiple output ports; the main control unit is connected to each of the multiple switching units; each switching unit is connected to one of the charging units and one of the output ports, and the charging unit and the output port connected to each switching unit are connected; the output port is used to connect a load; The main control unit is used to turn on one of the multiple switching units connected to a load; when the switching unit connected to a load is in the on state, the first charging voltage is conducted through the switching unit to the corresponding output port and the charging unit; when the switching unit connected to a load is in the off state, the corresponding charging unit outputs a second charging voltage and conducts the second charging voltage to the corresponding output port.

[0005] In a second aspect, a power supply device is provided, including the power supply control circuit described in any embodiment of this application.

[0006] In the power supply control circuit provided in the above embodiments, the main control unit is connected to the plurality of switching units respectively; each switching unit is connected to a charging unit and an output port, and the charging unit and the output port connected to each switching unit are also connected; after a load is connected to the output port, when the switching unit connected to the load is in the on state, the switching unit conducts a first charging voltage to the corresponding output port and the charging unit; when the switching unit connected to the load is in the off state, the corresponding charging unit outputs a second charging voltage and conducts the second charging voltage to the corresponding output port. Thus, by setting the switching unit and the charging unit to be connected to the output port, different voltages can be provided to different output ports without the need to design and add multiple DC-DC conversion circuits. This can be achieved simply by utilizing the charging and discharging coordination of the switching unit and the charging unit, greatly reducing production costs and avoiding losses caused by DC-DC conversion circuits, thereby improving power supply efficiency.

[0007] The power supply device provided in the above embodiments belongs to the same concept as the corresponding power supply control circuit embodiments, and thus has the same technical effect as the corresponding power supply control circuit embodiments, which will not be repeated here. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the power supply control circuit in one embodiment of this application; Figure 2 This is a schematic diagram of the power supply control circuit in another embodiment of this application; Figure 3 This is a schematic diagram of the connection of the feedback module of the main control unit in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of the switching unit in one embodiment of this application; Figure 5 This is a schematic diagram of the power supply control circuit in another embodiment of this application; Figure 6 This is a schematic diagram of the power supply control circuit in another embodiment of this application; Figure 7 This is a schematic diagram of the structure of the charging unit in one embodiment of this application; Figure 8 This is a schematic diagram of the power supply control circuit in one embodiment of this application.

[0009] Explanation of reference numerals in the attached figures 1. Main control unit; 2. Switching unit; 3. Charging unit; 4. Output port; 5. Power supply unit; 6. Port control chip; 11. Feedback module; 21. First MOSFET; 22. Second MOSFET; 23. First resistor; 24. First capacitor; 31. Charging capacitor; 32. Second capacitor. Detailed Implementation

[0010] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0011] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0012] In the following description, the phrase "some embodiments" refers to a subset of all possible embodiments. It should be noted that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0013] In the following description, the terms "first," "second," and "third" are used merely to distinguish similar objects and do not represent a specific ordering of the objects. It is understood that "first," "second," and "third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0014] like Figure 1 As shown, one embodiment of this application provides a power supply control circuit applied to a power supply device, including: a main control unit 1, multiple switching units 2, multiple charging units 3, and multiple output ports 4; The main control unit 1 is connected to the plurality of switching units 2 respectively; each switching unit 2 is connected to a charging unit 3 and an output port 4, and the charging unit 3 and the output port 4 connected to each switching unit 2 are connected; the output port 4 is used to connect a load; The main control unit 1 is used to turn on one of the multiple switching units 2 connected to a load; When the switch unit 2 connected to a load is in the ON state, the first charging voltage is conducted through the switch unit 2 to the corresponding output port 4 and the charging unit 3; When the switch unit 2 connected to a load is in the off state, the corresponding charging unit 3 outputs a second charging voltage and conducts the second charging voltage to the corresponding output port 4.

[0015] In the embodiments of this application, all connections are electrical connections.

[0016] In one embodiment, after a load is connected to the output port 4, one of the switching units 2 is in a conducting state under the control of the main control unit 1. That is, when the switching unit 2 connected to the load is in a conducting state, a first charging voltage is provided to the corresponding output port 4 and the charging unit 3, and the corresponding charging unit 3 enters a charging state; wherein, the first charging voltage can be output by the power supply module. After the charging voltage of the charging unit 3, which has entered the charging state, reaches the target voltage required by the corresponding output port 4, the switching unit 2 is in the off state based on the control of the main control unit 1. That is, when the switching unit 2 connected to the load is in the off state, the charging unit 3 discharges to the output port 4 and outputs the second charging voltage. After the charging voltage of the charging unit 3 drops to a preset lower limit, the switching unit 2 is in a conducting state based on the control of the main control unit 1. That is, when the switching unit 2 connected to the load is in a conducting state, the first charging voltage continues to be conducted to the corresponding output port 4 and the charging unit 3, and the charging unit 3 enters the charging state.

[0017] Here, the power supply device using the power supply control circuit can be a mobile power supply or other device with active power supply function, or a power adapter or other device used for power relay or conversion functions. Output port 4 in the power supply control circuit is used to connect the load that needs power; the operating voltage of the load is the target voltage required by the connected output port 4.

[0018] In one embodiment, the main control unit 1 can be a main control chip (denoted as U1), such as the SC3107M, NE3385, or TEA1995T. The switching unit 2 can include one or more MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors). The gate of the MOSFET can be connected to the main control unit 1, allowing the main control unit 1 to control the on / off state of the MOSFET by controlling the high and low levels of the signal sent to the gate. The number of switching units 2 can be two or more, and multiple switching units 2 can be connected in parallel to the main control unit 1. Optionally, each switching unit 2 can be connected to one pin of the main control unit 1.

[0019] In one embodiment, the number of switching units 2 can specifically correspond to the number of output ports 4 of the power supply control circuit, with one switching unit 2 connected to each output port 4. For example, when there are 2 output ports 4, the number of switching units 2 is also 2; when there are 3 output ports 4, the number of switching units 2 is also 3; when there are 4 output ports 4, the number of switching units 2 is also 4, and no limitation is made here.

[0020] In one embodiment, each switching unit 2 is connected to a set of charging units 3 and an output port 4. A set of charging units 3 and an output port 4 means that one charging unit 3 and one output port 4 are connected in parallel to one switching unit 2, and the charging unit 3 is also connected to the output port 4. The number of switching units 2, the number of charging units 3, and the number of output ports 4 are the same in the power supply control circuit; that is, each switching unit 2 is connected to one charging unit 3 and one output port 4, and different switching units 2 are connected to different charging units 3 and different switching units 2 are connected to different output ports 4.

[0021] In one embodiment, the charging unit 3 may include a charging capacitor 31. Each switching unit 2 is connected to the positive terminal of the charging capacitor 31 in the charging unit 3, and the positive terminal of the charging capacitor 31 is also connected to a corresponding output port 4. When the switching unit 2 is turned on, it charges the charging capacitor 31 by outputting a voltage to the positive terminal of the charging capacitor 31. When the switching unit 2 is turned off, the charging capacitor 31 discharges through its positive terminal to the connected output port 4.

[0022] In one embodiment, the target voltages required by the plurality of output ports 4 may all be the same, some may be the same, or all may be different. It is understood that the target voltage required by output port 4 is specifically the voltage required by the load connected to that output port 4. In this embodiment, the target voltage required by output port 4 will only exist when a load is connected to output port 4.

[0023] In one embodiment, different output ports 4 may or may not be connected to a load. When two or more output ports 4 are connected to a load, the main control unit 1 first controls the switch unit 2 corresponding to one of the output ports 4 connected to the load to be turned on. After the charging unit 3 corresponding to that output port 4 completes charging, the switch unit 2 corresponding to that output port 4 is turned off, and the switch units 2 corresponding to other output ports 4 connected to the load are turned on in sequence, and so on.

[0024] Specifically, the main control unit 1 only turns on one of the switching units 2 connected to the load. In one embodiment, the charging unit 3 completes charging when the charging voltage of the charging unit 3 reaches the target voltage required by the corresponding output port 4.

[0025] In one embodiment, the order in which multiple switching units 2 are turned on can be in ascending order of the target voltage required by the output port 4 connected to the switching unit 2, thereby reducing the waiting time required for the later-turned switching unit 2. It is understood that both the first charging voltage and the second charging voltage are supply voltages used to charge the load connected to the output port 4.

[0026] The first charging voltage is the supply voltage output by an external power source or an internal power source connected to the switching unit 2. When the switching unit 2 is turned on, the first charging voltage supplies power to the load connected to the switching unit 2 through the turned-on switching unit 2.

[0027] The second charging voltage is the power supply voltage output by charging unit 3, which is directly supplied to the load. When switching unit 2 is open, charging unit 3 directly supplies power to the corresponding load.

[0028] In one embodiment, the power supply control circuit may further include a power supply unit 5, which may be an external or internal power supply connected to the switching unit 2. The main control unit 1 is connected to the power supply unit 5, and the power supply unit 5 is connected to multiple switching units 2. When the switching units 2 are in the on state, the power supply unit 5 conducts the first charging voltage through the on-state switching unit 2 to supply power to the corresponding output port 4 and to charge the corresponding charging unit 3. When the switching units 2 are in the off state, the charging unit 3, which has completed charging, supplies power to the corresponding output port 4.

[0029] When the power supply control circuit is applied to a power supply device that is a power adapter, the power adapter is connected to an external power source. The voltage output by the power adapter is charged to the corresponding charging unit 3 after passing through the charging unit 3, or supplied to the corresponding output port 4.

[0030] When the power supply control circuit is applied to a power supply device that is a portable power bank, the internal power output voltage of the portable power bank charges the corresponding charging unit 3 after passing through the charging unit 3, or supplies power to the corresponding output port 4.

[0031] In one embodiment, the main control unit 1 can also be connected to the output port 4 to obtain the target voltage corresponding to the load connected to the output port 4. For example, the main control unit 1 can be connected to the output port 4 through a port control chip 6.

[0032] In one embodiment, the switching unit 2 and the charging unit 3 are connected to the output port 4, which can be achieved through a port control unit. For example, the port control unit can be controlled by a port control chip 6, which may include a MOSFET or similar component to control whether power is supplied to the corresponding output port 4. The gate of the MOSFET in the port control unit can be connected to the port control chip 6.

[0033] In one embodiment, the charging voltage of the charging unit 3 may refer to the required voltage of the output port 4. In other words, the charging voltage of the charging unit 3 may refer to the required voltage of the corresponding load. For example, when the charging unit 3 includes a charging capacitor 31, the charging voltage of the charging capacitor 31 may be equal to the required voltage of the load connected to the charging capacitor 31.

[0034] Of course, in other embodiments, the charging voltage of the charging unit 3 may also refer to the voltage corresponding to the charging unit 3. For example, when the charging unit 3 includes a charging capacitor 31, the charging voltage may be equal to the voltage stored in the charging capacitor 31.

[0035] In one embodiment, the charging voltage reaching the target voltage required for the corresponding output port 4 can mean that the charging voltage is equal to the target voltage, or it can mean that the charging voltage reaches a preset upper limit value greater than the target voltage. The preset upper limit value can be greater than the target voltage and the difference between the two values ​​is less than a first preset difference value, or the difference value as a percentage of the target voltage is less than a first preset percentage value, etc.

[0036] For example, when the target voltage is 5V, the charging voltage reaching the target voltage can mean that the charging voltage is equal to 5V, or equal to 5.1V, 5.01V, or other values ​​that exceed the preset upper limit of the target voltage.

[0037] In one embodiment, the charging voltage dropping to a preset lower limit can mean that the charging voltage drops below a preset lower limit of the target voltage. The difference between the preset lower limit and the target voltage can be less than a second preset difference, or the difference as a percentage of the target voltage can be less than a first preset percentage. The first preset difference can be less than the second preset difference, and the first preset percentage can be less than the second preset percentage, thereby reducing charging time and increasing discharging time, which helps to avoid affecting the on / off control of other switching units 2.

[0038] For example, when the target voltage is 5V, the preset lower limit value can be any value less than 5V, such as 4.9V, 4.95V, or 4.96V.

[0039] In one embodiment, after the charging voltage of the charging unit 3 reaches the target voltage required by the corresponding output port 4, the switching unit 2 is in an off state under the control of the main control unit 1, and another switching unit 2 is in an on state under the control of the main control unit 1.

[0040] Here, the other switching unit 2 can be a switching unit 2 that has not yet been conducted after the load is connected to the corresponding output port 4, or it can be a switching unit 2 whose charging voltage of the corresponding charging unit 3 has dropped to a preset lower limit value.

[0041] In one embodiment, after the charging voltage of the charging unit 3 drops to a preset lower limit, the switching unit 2 is in a conducting state based on the control of the main control unit 1. This can mean that after the charging voltage of the charging unit 3 drops to the preset lower limit and all other switching units 2 are in a disconnected state, the switching unit 2 is in a conducting state based on the control of the main control unit 1.

[0042] Here, the other switching units 2 are all in the off state, which may mean that the output port 4 corresponding to the other switching units 2 is not connected to a load, or that the charging voltage of the corresponding charging unit 3 has reached the target voltage required by the corresponding output port 4.

[0043] Thus, by connecting the switching unit 2 and the charging unit 3 to the output port 4, different voltages can be supplied to different output ports 4. When one switching unit 2 is turned on, other output ports 4 can be powered by the charging unit 3. When the charging unit 3 is low on and needs charging, the switching unit 2 can be turned on to charge, achieving flexible power supply control for multiple output ports 4 and multiple output voltages. Moreover, there is no need to design additional multi-channel DC-DC conversion circuits; it can be achieved simply by using the charging and discharging coordination of the switching unit 2 and the charging unit 3, which greatly reduces production costs and avoids losses caused by DC-DC conversion circuits, thereby improving power supply efficiency.

[0044] In some embodiments, such as Figure 2 As shown, the main control unit 1 includes a feedback module 11, and the charging unit 3 is also connected to the feedback module 11; The main control unit 1 is used to collect the charging voltage of the charging unit 3 through the feedback module 11, and control the corresponding switch unit 2 to disconnect when the charging voltage reaches the target voltage required by the corresponding output port 4.

[0045] In one embodiment, the feedback module 11 can be a feedback pin of the main control unit 1. Each charging unit 3 can be connected to one feedback module 11, and different charging units 3 can be connected to different feedback modules 11. For example, the main control unit 1 can include two feedback modules 11, namely FB1 and FB2, and the two charging units 3 can be connected to FB1 and FB2 respectively.

[0046] In one embodiment, the charging unit 3 is connected to the feedback module 11. This can mean that the end of the charging unit 3 connected to the output port 4 is connected to the feedback module 11. For example, the positive terminal of the charging capacitor 31 is connected to the output port 4, and the positive terminal is also connected to the feedback module 11, for the main control unit 1 to detect the voltage (i.e., charging voltage) of the charging capacitor 31.

[0047] The feedback module 11 can collect the charging voltage of the charging unit 3, and the main control unit 1 can turn the corresponding switch unit 2 on or off according to the change in the charging voltage of the charging unit 3.

[0048] The number of feedback modules 11 can be one or more. When there is only one feedback module 11, it can be connected to each charging unit 3, so that the main control unit 1 only needs one feedback module 11 to monitor the charging voltage of each charging unit 3. When there are multiple feedback modules 11, each feedback module 11 can be connected to one charging unit 3, thereby improving the accuracy of monitoring the charging voltage of each charging unit 3.

[0049] In one embodiment, the charging unit 3 can be connected to the feedback module 11 via a filtering unit. For example, the filtering unit may include at least one resistor and at least one capacitor for filtering out noise. For example, ... Figure 3 As shown, the charging unit 3 can be connected to the feedback module 11 through two series resistors R1 and R2. A set of filter capacitors and filter resistors can be connected in parallel across the two ends of each of the two series resistors. That is, filter capacitor C11 and filter resistor R11 are connected in parallel across the two ends of R1, and filter capacitor C21 and filter resistor R21 are connected in parallel across the two ends of R2. C21 and R21 can also be grounded together.

[0050] In one embodiment, when the power supply control circuit further includes a port control chip 6, the feedback module 11 of the main control unit 1 is also connected to the feedback module 11 of the port control chip 6, and is used to obtain the target voltage corresponding to the connected output port 4 through the port control chip 6.

[0051] In one embodiment, the main control unit 1 can compare the collected charging voltage with the target voltage of the corresponding output port 4, control the corresponding switch unit 2 to turn off when the charging voltage reaches the target voltage, and control the corresponding switch unit 2 to turn on when the charging voltage drops below the preset lower limit of the target voltage.

[0052] In one embodiment, the main control unit 1 is further configured to collect the charging voltage of the charging unit 3 through the feedback module 11, and control the corresponding switching unit 2 to turn on when the charging voltage drops to a preset lower limit value.

[0053] In this way, by collecting the voltage changes of the charging unit 3 in real time through the feedback module 11 of the main control unit 1, the timing of adjusting the switching unit 2 can be determined more accurately and efficiently, and multiple precise control can be achieved without adding too many circuit units.

[0054] In some embodiments, the switching unit 2 includes two diodes connected in series and having opposite conduction directions.

[0055] In some embodiments, the switching unit 2 includes: a first MOS transistor 21 and a second MOS transistor 22 connected in series, and the body diodes of the first MOS transistor 21 and the second MOS transistor 22 have opposite conduction directions; The gates of the first MOS transistor 21 and the second MOS transistor 22 are respectively connected to the main control unit 1; when the first MOS transistor 21 and the second MOS transistor 22 are turned on under the control of the main control unit 1, the switching unit 2 in which they are located is turned on.

[0056] In one embodiment, the first MOSFET 21 and the second MOSFET 22 can be MOSFETs of the same type, such as both being N-type MOSFETs (NMOS), or they can be MOSFETs of different types, such as NMOS and PMOS respectively.

[0057] In one embodiment, the body diodes of the first MOSFET 21 and the second MOSFET 22 have opposite conduction directions. For example, this can mean that the first MOSFET 21 and the second MOSFET 22 are connected to the same terminal. For example, the source (S) of the first MOSFET 21 is connected to the source of the second MOSFET 22, or the drain (D) of the first MOSFET 21 is connected to the drain of the second MOSFET 22, etc.

[0058] In one embodiment, the power supply control circuit further includes a power supply unit 5, wherein the drains of the first MOSFET 21 and the second MOSFET 22 can be connected, and the source of the first MOSFET 21 is connected to the power supply unit 5, and the source of the second MOSFET 22 is connected to the corresponding charging unit 3 and the output port 4.

[0059] In one embodiment, the gate (G) of the first MOS transistor 21 and the gate (G) of the second MOS transistor 22 can be connected to different pins of the main control unit 1. For example, the gate of the first MOS transistor 21 is connected to the DSW1 pin, and the on / off state of the first MOS transistor 21 is controlled by the DSW1 signal. The gate of the second MOS transistor 22 is connected to the DVO1 pin, and the on / off state of the second MOS transistor 22 is controlled by the DVO1 signal.

[0060] In one embodiment, the gate of the second MOSFET 22 can be connected to the main control unit 1 through a voltage regulator unit, wherein the voltage regulator unit may include a Zener diode, a resistor, and a capacitor, etc., for overvoltage protection, etc.

[0061] Thus, by connecting two diodes with opposite conduction directions or two MOSFETs with opposite body diode directions in series as switch unit 2, the main control unit 1 can accurately control the switching unit 2, and the opposite conduction directions can prevent backflow, avoid current flowing from the output terminal to the input terminal, and improve circuit reliability.

[0062] In some embodiments, such as Figure 4 As shown, the switching unit 2 further includes: a first resistor 23 and a first capacitor 24 connected in parallel across the first MOS transistor 21 and the second MOS transistor 22; The first end of the first resistor 23 is connected to the source of the first MOSFET 21, the second end of the first resistor 23 is connected to the first end of the first capacitor 24, the second end of the first capacitor 24 is connected to the source of the second MOSFET 22, and the drain of the first MOSFET 21 is connected to the drain of the second MOSFET 22.

[0063] In one embodiment, the first resistor 23 and the first capacitor 24 are connected in series, and the first resistor 23 and the first capacitor 24 are connected in parallel across the first MOSFET 21 and the second MOSFET 22. The first resistor 23 and the first capacitor 24 constitute a buffer unit.

[0064] In one embodiment, when the power supply control circuit further includes a power supply unit 5, the source of the first MOSFET 21 is also connected to the power supply unit 5, and the source of the second MOSFET 22 is also connected to the corresponding charging unit 3 and the output port 4.

[0065] In another embodiment, the first end of the first resistor 23 is connected to the drain of the first MOS transistor 21, the second end of the first resistor 23 is connected to the first end of the first capacitor 24, the second end of the first capacitor 24 is connected to the drain of the second MOS transistor 22, and the source of the first MOS transistor 21 is connected to the source of the second MOS transistor 22.

[0066] When the power supply control circuit also includes a power supply unit 5, the drain of the first MOSFET 21 is also connected to the power supply unit 5, and the drain of the second MOSFET 22 is also connected to the corresponding charging unit 3 and the output port 4.

[0067] In this way, by connecting a set of resistors and capacitors in parallel across the two MOSFETs, the charging and discharging current can be effectively limited, preventing excessive current from damaging the MOSFETs. Furthermore, voltage spikes can be absorbed to filter out high-frequency noise, further improving the reliability of the MOSFETs and the circuit.

[0068] In some embodiments, such as Figure 5As shown, the circuit also includes a power supply unit 5, which is connected to the main control unit 1 and the plurality of switching units 2 respectively, and is used to provide the first charging voltage to the corresponding output port 4 and the charging unit 3 through the switching unit 2; The main control unit 1 is also used to obtain the target voltage required by the plurality of output ports 4, and adjust the first charging voltage output by the power supply unit 5 based on the target voltage.

[0069] Here, the power supply unit 5 provides charging voltage to the corresponding output port 4 and the charging unit 3. This means that the first charging voltage output by the power supply unit 5 is used to supply power to the output port 4 and to charge the charging unit 3. The power supply unit 5 can be connected to the main control unit 1, which controls and adjusts the output voltage of the power supply unit 5, i.e., the first charging voltage.

[0070] For example, the main control unit 1 can be used to adjust the output voltage of the power supply unit 5 based on the target voltage required by the multiple output ports 4 of the connected load. For instance, the output voltage of the power supply unit 5 is equal to the sum of the target voltages required by the multiple output ports 4 of the connected load.

[0071] In one embodiment, the power supply unit 5 may include an analog-to-digital converter (AD primary module) and a secondary rectifier module. The secondary rectifier module may include a rectifier bridge and a transformer, etc., and the transformer outputs a voltage signal.

[0072] In some embodiments, the power supply unit 5 includes an analog-to-digital converter and a transformer; the transformer is connected to the analog-to-digital converter and the main control unit 1 respectively, and is used to transform the voltage output by the analog-to-digital converter; the main control unit 1 is used to adjust the output voltage of the transformer, i.e., the first charging voltage, based on the target voltage corresponding to the charging unit 3 to be charged.

[0073] In one embodiment, the analog-to-digital converter can be connected to a transformer via a rectifier bridge. For example, one end of the transformer is connected to the rectifier bridge, and the other end is connected to the switching unit 2. The transformer is also connected to the main control unit 1 for outputting a voltage signal based on the control of the main control unit 1.

[0074] In this way, the power supply unit 5 can achieve flexible transformer control. The main control unit 1 adjusts the transformer output voltage based on the target voltage required by the output port 4, thereby achieving circuit balance and improving power supply efficiency.

[0075] In some embodiments, such as Figure 6 As shown, the circuit also includes a port control chip 6; the switching unit 2 and the charging unit 3 are connected to the output port 4 through the port control chip 6; The main control unit 1 includes a feedback module 11, and the port control chip 6 is also connected to the feedback module 11 to provide the main control unit 1 with the target voltage required by the plurality of output ports 4 through the feedback module 11.

[0076] In one embodiment, the port control chip 6 (denoted as U2) can be used to control communication with the output port 4, for example, it can be a protocol control chip. The switching unit 2 and the charging unit 3 are connected to the output port 4 through the port control chip 6. This can mean that the switching unit 2 and the charging unit 3 are connected to the output port 4 through a port control unit connected to the port control chip 6. The port control unit may include one or more MOSFETs, and the gate of the MOSFET in the port control unit may be connected to the port control chip 6. The port control chip 6 controls the on / off state of the port control unit, thereby controlling the power supply switch to the output port 4.

[0077] In one embodiment, the port control chip 6 also includes a feedback module 11, i.e., a feedback pin. The feedback module 11 of the port control chip 6 is connected to the feedback module 11 of the main control unit 1. After the port control chip 6 obtains the working voltage (i.e., the target voltage) of the load connected to the output port 4, it sends the target voltage to the feedback module 11 of the main control unit 1. The main control unit 1 compares the charging voltage obtained by the feedback module 11 with the target voltage to determine whether to charge the charging unit 3.

[0078] In one embodiment, the feedback module 11 included in the main control unit 1 is a first feedback module 11. The main control unit 1 may include multiple first feedback modules 11. Each first feedback module 11 is connected to a charging unit 3, and different first feedback modules 11 are connected to different charging units 3.

[0079] Here, the port control chip 6 includes a feedback module 11, which is a second feedback module 11. The port control chip 6 can include multiple second feedback modules 11, each of which is connected to a first feedback module 11, and different second feedback modules are connected to different first feedback modules 11. The second feedback module 11 sends the target voltage of the output port 4 corresponding to the charging unit 3 connected to it to the first feedback module 11. Based on the charging voltage and target voltage obtained from each first feedback module 11, the main control unit 1 can accurately determine whether the charging unit 3 corresponding to different first feedback modules 11 needs charging, thereby precisely and quickly controlling the on / off state of the corresponding switching unit 2.

[0080] In this way, by providing the target voltage corresponding to the output port 4 to the main control unit 1 through the port control chip 6, the function of the port communication chip can be fully utilized and the efficiency of power supply control can be improved.

[0081] In some embodiments, the charging unit 3 includes: a charging capacitor 31; The first end of the charging capacitor 31 is connected to the corresponding switch unit 2 and the corresponding output port 4 respectively, and the second end of the charging capacitor 31 is grounded; the charging capacitor 31 is used to charge when the switch unit 2 is on and to discharge to the output port 4 when the switch unit 2 is off.

[0082] Here, the first end of the charging capacitor 31 is connected to the second MOSFET 22. For example, when the input terminal of the first MOSFET 21 is connected to the input terminal of the second MOSFET 22, the first end of the charging capacitor 31 is connected to the output terminal of the second MOSFET 22. Alternatively, when the output terminal of the first MOSFET 21 is connected to the output terminal of the second MOSFET 22, the first end of the charging capacitor 31 is connected to the input terminal of the second MOSFET 22.

[0083] In one embodiment, the charging capacitor 31 is used to charge based on a first charging voltage when the switching unit 2 is turned on.

[0084] In one embodiment, discharging to the output port 4 involves outputting a second charging voltage and conducting the second charging voltage to the corresponding output port 4. The charging capacitor 31 may include a positive terminal and a negative terminal, with the positive terminal serving as the first terminal of the charging capacitor 31 and the negative terminal serving as the second terminal of the charging capacitor 31.

[0085] In one embodiment, the capacitance of the charging capacitor 31 can be 200~1000μF, thereby avoiding excessive capacitance leading to excessive size and significant impact on space.

[0086] In one embodiment, the main control unit 1 includes a feedback module 11, and the first end of the charging capacitor 31 is connected to the feedback module 11 so that the main control unit 1 can obtain the voltage of the charging capacitor 31, i.e., the aforementioned charging voltage, in real time.

[0087] In some embodiments, such as Figure 7 As shown, the charging unit 3 further includes a second capacitor 32; The second capacitor 32 is connected in parallel with the charging capacitor 31. The first end of the second capacitor 32 is connected to the first end of the charging capacitor 31, and the second end of the second capacitor 32 and the second end of the charging capacitor 31 are grounded together.

[0088] Here, the second capacitor 32 is connected in parallel across the charging capacitor 31 and can be used as an output filter capacitor to filter out ripple, maintain voltage stability, and suppress high-frequency noise.

[0089] In one embodiment, the first end of the second capacitor 32 is connected to the first end of the charging capacitor 31 and the corresponding switching unit 2, respectively, and the second end of the second capacitor 32 and the second end of the charging capacitor 31 are connected to ground together.

[0090] Thus, the charging unit 3 uses capacitors to provide energy storage and power supply, which can better realize the flexible control of multi-port power supply. In the case that it is not possible to supply power to multiple output ports 4 at the same time, the energy storage of capacitors can realize continuous power supply to multiple ports.

[0091] This application also provides a power supply device, including the power supply control circuit described in any one or more of the foregoing embodiments.

[0092] Here, the power supply device can be a mobile power supply or other device with active power supply function, or a power adapter or other device used for power relay or conversion functions.

[0093] As one possible implementation, a power supply control circuit is provided, with the structure as follows: Figure 8 As shown, the main control unit 1, i.e., U1, is connected to and controls the switching of the first MOSFET 21 in the two switching units 2 via DSW1 and DSW2 signals, and is connected to and controls the switching of the second MOSFET 22 in the two switching units 2 via DVO1 and DVO2 signals. The feedback module 11 of U1 includes FB1 and FB2 pins, which are connected to U2 respectively. Two power switching units 2 (i.e., switching units 2) are added to the traditional single-output voltage architecture. Through precise control of the power switching units 2, the respective output voltage and power requested by the two output ports 4, i.e., C1 and C2, are achieved. For example, C1 outputs 5V and C2 outputs 20V. The secondary control module (i.e., the main control unit 1) first controls the power switching unit 2 to provide the first charging voltage to C1. When the charging voltage of the charging unit 3 corresponding to C1 reaches the requested 5V, the switching unit 2 is turned off, and the power switching unit 2 is enabled to provide the first charging voltage to C2. When the charging voltage of the charging unit 3 corresponding to C2 reaches 20V, the switching unit 2 and the secondary rectifier module (i.e., including the rectifier bridge and transformer) are turned off. The secondary control module combines the total energy required by C1 and C2 and feeds the control feedback to the AD primary module (i.e., power supply unit 5) to achieve circuit operation balance.

[0094] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0095] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power supply control circuit, applied to a power supply device, characterized in that, include: The system includes a main control unit, multiple switching units, multiple charging units, and multiple output ports. The main control unit is connected to the plurality of switch units respectively; Each of the aforementioned switching units is connected to one of the aforementioned charging units and one of the aforementioned output ports, and the charging unit and the output port to which each of the aforementioned switching units is connected are also connected; the output port is used to connect a load. The main control unit is used to turn on one of the multiple switching units connected to a load; When the switch unit connected to a load is in the ON state, the first charging voltage is conducted through the switch unit to the corresponding output port and the charging unit; When the switch unit connected to a load is in the off state, the corresponding charging unit outputs a second charging voltage and conducts the second charging voltage to the corresponding output port.

2. The power supply control circuit according to claim 1, characterized in that, The main control unit includes a feedback module, and the charging unit is also connected to the feedback module. The main control unit is used to collect the charging voltage of the charging unit through the feedback module. When the charging voltage reaches the target voltage required by the corresponding output port, the corresponding switch unit is disconnected.

3. The power supply control circuit according to claim 2, characterized in that, The main control unit is also used to collect the charging voltage of the charging unit through the feedback module, and when the charging voltage drops to a preset lower limit, the corresponding switching unit is turned on.

4. The power supply control circuit according to claim 1, characterized in that, The switching unit includes two diodes connected in series and having opposite conduction directions.

5. The power supply control circuit according to claim 1, characterized in that, The switching unit includes: a first MOSFET and a second MOSFET connected in series, wherein the body diodes of the first MOSFET and the second MOSFET have opposite conduction directions; The gates of the first MOS transistor and the second MOS transistor are respectively connected to the main control unit; when the first MOS transistor and the second MOS transistor are turned on under the control of the main control unit, the switching unit in which they are located is turned on.

6. The power supply control circuit according to claim 1, characterized in that, The circuit also includes a power supply unit, which is connected to the main control unit and the plurality of switching units respectively, and is used to provide the first charging voltage to the corresponding output port and the charging unit through the switching units; The main control unit is also used to obtain the target voltage required by the plurality of output ports, and adjust the first charging voltage output by the power supply unit based on the target voltage.

7. The power supply control circuit according to claim 6, characterized in that, The power supply unit includes: an analog-to-digital converter and a transformer; The transformer is connected to the analog-to-digital converter and the main control unit respectively, and is used to transform the voltage output by the analog-to-digital converter; the main control unit is used to adjust the output voltage of the transformer based on the target voltage corresponding to the charging unit to be charged.

8. The power supply control circuit according to claim 6, characterized in that, The circuit also includes a port control chip; the switching unit and the charging unit are connected to the output port through the port control chip. The main control unit includes a feedback module, and the port control chip is also connected to the feedback module to provide the main control unit with the target voltage required by the plurality of output ports through the feedback module.

9. The power supply control circuit according to claim 1, characterized in that, The charging unit includes: a charging capacitor; The first end of the charging capacitor is connected to the corresponding switching unit and the corresponding output port, respectively, and the second end of the charging capacitor is grounded; the charging capacitor is used to charge when the switching unit is on and to discharge to the output port when the switching unit is off.

10. The power supply control circuit according to claim 9, characterized in that, The charging unit further includes: a second capacitor; The second capacitor is connected in parallel with the charging capacitor, the first terminal of the second capacitor is connected to the first terminal of the charging capacitor, and the second terminal of the second capacitor and the second terminal of the charging capacitor are grounded together.

11. A power supply device, characterized in that, Includes the power supply control circuit as described in any one of claims 1 to 10.

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