A power switch circuit and related apparatus

Abstract

The application discloses a power switch circuit and related equipment, relates to the technical field of power control, and comprises a switch unit, a voltage division unit, a transistor switch unit and a power control chip. When the switch unit is closed, the voltage division unit is in a first voltage division state; when the switch unit is disconnected, the voltage division unit is in a second voltage division state. When the voltage division unit is in the first voltage division state, the transistor switch unit is turned on; when the voltage division unit is in the second voltage division state, the transistor switch unit is turned off. When the transistor switch unit is in the on state, a first voltage signal is output to the power control chip; when the transistor switch unit is in the off state, a second voltage signal is output to the power control chip. The power control chip controls the opening and closing of the power supply according to the received first voltage signal and second power signal. The application can realize the opening and closing of the power supply under small current and low energy consumption by closing the switch unit through the transistor switch driven by low voltage, the voltage division unit and the corresponding power control chip.

Description

Technical Field

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

[0002] In the existing technology, the power supply switching control is mainly achieved by connecting a mechanical input / output switch (I / O switch) in series between the live wire and the power supply. The power supply is started or stopped by directly opening or closing the I / O switch. However, with the development of technology, the power consumption of terminal devices continues to rise, and the corresponding power supply current will also increase.

[0003] Therefore, the current carried by the I / O switch connected in series with the power supply will also increase accordingly. Since the I / O switch is usually connected to the circuit by soldering, this connection setting of the I / O switch will cause the power consumption of the I / O switch to increase exponentially when the current increases, resulting in excessive power consumption of the part responsible for power switch control (i.e., the I / O switch connected in series) under high current. Summary of the Invention

[0004] In view of the above problems, this application provides a power switch circuit and related equipment to achieve the purpose of low-energy control of power supply switching on or off. The specific solution is as follows:

[0005] The first aspect of this application provides a power switch circuit, including: a switching unit, a voltage divider unit, a transistor switching unit, and a power control chip;

[0006] One end of the switching unit and the gate of the transistor switching unit are connected to one end of the voltage divider unit. The other end of the switching unit and the source of the transistor switching unit are grounded. The drain of the transistor switching unit is connected to the input terminal of the power control chip. The output terminal of the power control chip is connected to the input terminal of the power supply.

[0007] The switching unit is used to control the voltage divider unit to be in a first voltage divider state when closed, and to control the voltage divider unit to be in a second voltage divider state when open; the voltage divider unit is used to control the transistor switching unit to be turned on when in the first voltage divider state, and to control the transistor switching unit to be turned off when in the second voltage divider state; the transistor switching unit is used to output a first voltage signal to the power control chip when in the on state, and to output a second voltage signal to the power control chip when in the off state; the power control chip is used to control the power supply to be turned on after receiving the first voltage signal, and to control the power supply to be turned off after receiving the second voltage signal.

[0008] Furthermore, the power control chip includes: a first power control chip;

[0009] The first power control chip includes a voltage detection pin BR, which is connected to the drain of the switching transistor unit. After receiving the first voltage signal, the first power control chip controls the power supply to be turned on. After receiving the second voltage signal, the first power control chip controls the power supply to be turned off.

[0010] Furthermore, the voltage divider unit includes: a first voltage divider unit and a second voltage divider unit;

[0011] The input terminals of the first voltage divider unit and the second voltage divider unit are both connected to the output terminal of the energy storage capacitor of the power supply. The first output terminal of the first voltage divider unit is connected to one end of the switching unit. The second output terminal of the first voltage divider unit is grounded. The first output terminal of the second voltage divider unit is connected to the drain of the switching transistor unit and the voltage detection pin BR of the first power control chip. The second output terminal of the second voltage divider unit is grounded.

[0012] Furthermore, the first voltage divider unit includes a first resistor and a second resistor, and the second voltage divider unit includes a third resistor and a fourth resistor;

[0013] One end of the first resistor and one end of the third resistor are connected to the output terminal of the energy storage capacitor of the power supply. The other end of the first resistor, the gate of the transistor switching unit, and one end of the second resistor are connected to one end of the switching unit. One end of the second resistor is grounded.

[0014] The other end of the third resistor, the drain of the transistor switching unit, and one end of the fourth resistor are all connected to the voltage detection pin BR of the first power control chip, and the other end of the fourth resistor is grounded.

[0015] Furthermore, the first voltage divider unit also includes: a first capacitor and a second capacitor;

[0016] One end of the first capacitor is connected to one end of the second resistor, and the other end of the first capacitor is grounded;

[0017] One end of the second capacitor is connected to one end of the fourth resistor, and the other end of the second capacitor is grounded.

[0018] Furthermore, the power switch circuit also includes: a fifth resistor;

[0019] One end of the fifth resistor is connected to one end of the first resistor, and the other end of the fifth resistor is connected to the gate of the transistor switching unit.

[0020] Furthermore, the power control chip includes: a second power control chip;

[0021] The second power control chip includes a feedback pin and a power supply pin. The feedback pin is connected to the drain of the switching transistor unit. After receiving the first voltage signal, the first power control chip controls the power supply to be turned on. After receiving the second voltage signal, the first power control chip controls the power supply to be turned off.

[0022] The power supply pin is connected to the receiving end of the voltage divider unit. The power supply pin is used to provide voltage to the voltage divider unit after the first power control chip detects that the power supply is on.

[0023] Furthermore, the voltage divider unit includes a sixth resistor and a seventh resistor;

[0024] One end of the sixth resistor is connected to the power supply pin of the second power control chip, and the other end of the sixth resistor, the gate of the transistor switching unit, and one end of the seventh resistor are all connected to one end of the switching unit; the other end of the seventh resistor is grounded.

[0025] Furthermore, the power switch circuit also includes a third capacitor;

[0026] One end of the third capacitor is connected to one end of the seventh resistor, and the other end of the third capacitor is grounded.

[0027] The second aspect of this application provides a power supply for a power supply system, including: a power switch circuit and a power supply as described in the first aspect or any implementation thereof;

[0028] The signal output terminal of the power control chip of the power switch circuit is connected to the pin of the main circuit control chip of the power supply.

[0029] The power switch circuit is used to control the working state of the main circuit control chip of the power supply, thereby controlling the working state of the power supply.

[0030] By means of the above technical solution, this application provides a power switch circuit that controls the voltage divider unit to be in different voltage division states by closing and turning off the switch unit, thereby controlling the conduction and cutoff of the corresponding transistor switch unit. Based on the conduction and cutoff of the transistor switch unit, different voltage signals are sent to the power control chip, so that the power control chip can control the power supply to be turned on and off according to the closing and turning off of the switch unit. In the process of realizing the power supply to be turned on and off, the voltage divider unit can be used to limit the operating current of the power switch circuit. Moreover, the voltage threshold for controlling the conduction and cutoff of the transistor switch unit is low (usually 0.3V-5V). Therefore, the operating current of the entire circuit is small. So compared with the prior art that directly uses mechanical input / output switches (I / O switches) to control the power supply to be turned on and off, the power switch circuit provided in this application can significantly reduce the power consumption of power switch control. Attached Figure Description

[0031] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0032] Figure 1 A circuit block diagram for I / O switch control provided in this application;

[0033] Figure 2 A circuit block diagram for power switch control provided in this application;

[0034] Figure 3 A circuit diagram of a power switch circuit provided in this application;

[0035] Figure 4 A circuit diagram of another power switch circuit provided in this application. Detailed Implementation

[0036] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0037] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0038] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0039] In existing technologies, such as Figure 1 As shown, the power supply switching control is mainly achieved by connecting a mechanical input / output switch (I / O switch) in series between the live wire and the power supply. The power supply is turned on or off by directly opening or closing the I / O switch. As technology advances, the power consumption of terminal devices continues to rise, and the corresponding power supply current will also increase.

[0040] Therefore, the current carried by the I / O switch connected in series with the power supply will also increase accordingly. Since I / O switches are typically soldered into the circuit, this connection configuration causes the power consumption of the I / O switch to increase exponentially with rising current. This results in excessive power consumption in the part responsible for power switch control (i.e., the series-connected I / O switches) under high current. Furthermore, the aforementioned I / O switches are usually connected in series between the live wire and the power supply using a soldering process (e.g., directly soldering the I / O switch to the live wire and the power supply with tin). This soldering method is prone to cold solder joints. Under high current, if cold solder joints exist, they will further increase unnecessary heat loss, further exacerbating the energy consumption of the power supply's switching control. In view of this, this application provides a power switch circuit and related equipment.

[0041] See Figure 2 In some embodiments of this application, the power switch circuit includes: a switching unit, a voltage divider unit, a transistor switching unit, and a power control chip;

[0042] One end of the switching unit and the gate of the transistor switching unit are connected to one end of the voltage divider unit. The other end of the switching unit and the source of the transistor switching unit are grounded. The drain of the transistor switching unit is connected to the input terminal of the power control chip. The output terminal of the power control chip is connected to the input terminal of the power supply.

[0043] The switching unit controls the voltage divider unit to be in a first voltage divider state when closed and in a second voltage divider state when open; the voltage divider unit controls the transistor switching unit to be turned on when in the first voltage divider state and controls the transistor switching unit to be turned off when in the second voltage divider state; the transistor switching unit outputs a first voltage signal to the power control chip when in the on state and outputs a second voltage signal to the power control chip when in the off state; the power control chip controls the power supply to be turned on after receiving the first voltage signal and controls the power supply to be turned off after receiving the second voltage signal.

[0044] The transistor switching unit can use a low-voltage MOSFET (metal-oxide-semiconductor transistor), which has a low turn-on voltage (typically 0.3V-5V).

[0045] Based on the above power switch circuit, the voltage divider unit can be controlled to be in different voltage division states by closing and turning off the switching unit, thereby controlling the conduction and cutoff of the corresponding transistor switching unit. Different voltage signals are sent to the power control chip based on the conduction and cutoff of the transistor switching unit, so that the power control chip can control the power supply to be turned on and off according to the closing and turnoff of the switching unit. In the process of realizing the power supply to be turned on and off, the voltage divider unit can be used to divide the voltage to limit the operating current of the power switch circuit. Moreover, the voltage threshold for controlling the conduction and cutoff of the transistor switching unit is low (usually 0.3V-5V). Therefore, the operating current after being limited by the voltage divider unit can also meet the relevant voltage requirements for the conduction of the transistor switching unit. Therefore, the operating current of the entire circuit is small. Compared with the prior art of directly using mechanical input / output switches (I / O switches) to control the power supply to be turned on and off, the power switch circuit provided in this application can significantly reduce the power consumption of power switch control.

[0046] For details, please refer to Figure 3 In some embodiments of this application, the power switch circuit includes: a first switch unit S1 (i.e., a switch unit), a voltage divider unit including a first voltage divider unit (i.e., the first resistor R1 and the second resistor R2 shown in the figure) and a second voltage divider unit (i.e., the third resistor R3 and the fourth resistor R4 shown in the figure), a first MOS transistor switch Q1 (i.e., a transistor switch unit), and a first power control chip IC1.

[0047] In this configuration, one end of the first resistor R1 and one end of the third resistor R3 are connected to the output terminal of the energy storage capacitor of the power supply (corresponding to V1 in the diagram). The other end of the first resistor R1, one end of the fifth resistor, one end of the second resistor R2, and one end of the first capacitor are connected to one end of the first switching unit S1. The other end of the first switching unit S1, the other end of the second resistor R2, and the other end of the first capacitor are all grounded. The other end of the fifth resistor is connected to the gate of the first MOSFET switch Q1. The source of the first MOSFET switch Q1 is grounded. One end of the third resistor R3, the drain of the first MOSFET switch Q1, one end of the fourth resistor R4, and one end of the second capacitor are all connected to the voltage detection pin of the first power control chip IC1. The other end of the fourth resistor R4 and the other end of the second capacitor are grounded.

[0048] The first voltage control chip controls the power supply to turn on when the voltage reaches the first voltage threshold and controls the power supply to turn off when the voltage reaches the second voltage threshold.

[0049] To facilitate understanding of the technical solutions in the embodiments of this application, the circuit conditions during the operation of the power switch circuit are explained in detail below: Since one end of the first resistor R1 and one end of the third resistor R3 are both connected to the output terminal of the power storage capacitor, after the power supply is powered on (i.e., when power supply control is required), the output terminal of the energy storage capacitor will provide a voltage V1 to the first resistor R1 and the second resistor R2. If the first switch unit S1 is turned on, based on the above circuit connection method, it can be seen that the gate of the first MOS transistor switch Q1 is grounded, and the voltage between the gate and source of the first MOS transistor switch Q1 is... At this time, the first MOSFET switch Q1 is turned off, and the voltage corresponding to the voltage detection pin is... ,when When the first voltage threshold is reached (equivalent to the first MOSFET switch Q1 outputting the first voltage signal to the voltage detection pin of the first power control chip IC1), the first power control chip IC1 will control the power supply to be turned on. That is, the power supply is turned on when the first switch unit S1 is closed through the above control.

[0050] When the first switching unit S1 is in the off state, based on the above circuit connection method, the voltage between the gate and source of the first MOS transistor is: ,when When the conduction voltage of the first MOSFET switch Q1 is reached, the first MOSFET switch Q1 is turned on. At this time, the voltage detection pin of the first power control chip IC1 is grounded, and the voltage of the voltage detection pin is pulled down to the second voltage threshold (equivalent to the first MOSFET switch Q1 outputting a second voltage signal to the voltage detection pin of the first power control chip IC1). The first power control chip IC1 will control the power to turn off. That is, the power is turned off when the second switching unit is turned off through the above control.

[0051] It is understood that, in some embodiments of this application, the first capacitor and the second capacitor set in the power switch circuit corresponding to the first power control chip IC1 can be filter capacitors to smooth the voltage and avoid affecting the relevant control of power on or off when current disturbance occurs.

[0052] Furthermore, in some embodiments of this application, the fifth resistor set in the power switch circuit corresponding to the first power control chip IC1 can be used for further current limiting, thereby further reducing the energy consumption of the power switch circuit.

[0053] In the power switch circuit described above, the voltage division state of the voltage divider unit can be affected by closing and closing the first switch unit S1, thereby controlling the conduction or cutoff of the first MOSFET switch Q1. Based on the conduction or cutoff of the first MOSFET switch Q1, the voltage detection pin of the first power control chip IC1 receives a change in the voltage signal, thereby controlling the power supply to turn on and off. The first MOSFET switch Q1 in the power switch circuit described above is a low-voltage driven switch, requiring a small operating current. Furthermore, the resistor set by the voltage divider module can reduce the operating current of the entire power switch circuit. Thus, the entire power switch circuit can achieve the control of the power supply to turn on and off by closing or closing the first switch unit S1 with low energy consumption.

[0054] Specifically, in some embodiments of this application, the power switching circuit corresponding to the first power control chip IC1 has the following losses: The first resistor R1 is typically 9MΩ, and V1 is typically 400V, meaning the power loss of the circuit described above is 17mW. In contrast, the existing technology directly connects a mechanical input / output switch (I / O switch) in series between the live wire and the power supply, and controls the start or stop of the power supply by directly opening or closing the I / O switch. Under the same operating conditions, the power loss is typically 1.5W. Compared to the former, the power switch circuit provided in this application embodiment has significantly reduced power consumption.

[0055] See Figure 4To further reduce energy consumption, in some embodiments of this application, the power switch circuit includes: a second switch unit S2 (i.e., a switch unit), a voltage divider unit including a sixth resistor R6 and a seventh resistor R7, a second MOS switch Q2 (i.e., a transistor switch unit), and a second power control chip IC2.

[0056] In this configuration, one end of the second switching unit S2, one end of the sixth resistor R6, one end of the seventh resistor R7, and one end of the third capacitor are all connected to the gate of the second MOSFET switch Q2. The other end of the sixth resistor R6 is connected to the power supply pin VDD of the second power control chip IC2. The other end of the second switching unit S2, the other end of the seventh resistor R7, the other end of the third capacitor, and the source of the second MOSFET switch Q2 are grounded. The drain of the second MOSFET switch is connected to the feedback pin FB of the second power control chip IC2.

[0057] In this process, after the feedback pin FB of the second power control chip IC2 receives the first voltage signal, the first power control chip controls the power supply to turn on. After the feedback pin FB receives the second voltage signal, the first power control chip controls the power supply to turn off. The second power control chip IC2 is also used to sample the voltage V1 at the output terminal of the power supply's energy storage capacitor. When the power supply is powered on (i.e., when power supply control is required), the voltage V1 rises. Based on this sampling point, the second power control chip IC2 can provide the voltage required to turn on the second MOSFET switch to the sixth resistor R6 through the power supply pin VDD after detecting that the power supply is powered on (equivalent to providing voltage to the voltage divider unit).

[0058] To facilitate understanding of the technical solutions in the embodiments of this application, the circuit conditions during the operation of the power switch circuit are explained in detail below: When the second switching unit S2 is turned on under the voltage V2 provided by the power supply pin VDD of the second power control chip IC2, based on the above circuit connection method, it can be known that the gate of the second MOS transistor switch Q2 is grounded, and the voltage between the gate and source of the second MOS transistor switch Q2 is... At this time, the second MOSFET switch Q2 is cut off, and the drain and source of the second MOSFET switch Q2 are not conducting. The voltage of the feedback pin FB of the second power control chip IC2 is its own reference voltage. The voltage of the feedback pin FB does not change (equivalent to the second MOSFET switch Q2 outputting the first voltage signal (0 voltage signal)) to the voltage detection pin of the second power control chip IC2). At this time, the second power control chip IC2 controls the power supply to turn on normally by default. That is, the above control realizes the control of the power supply to turn on when the second switch unit S2 is turned on.

[0059] When the second switching unit S2 is in the off state, based on the above circuit connection, the voltage between the gate and source of the second MOS transistor switch Q2 is: By setting the value of the voltage V2 provided by the power supply pin VDD, the voltage between the gate and source of the second MOSFET switch Q2 can be adjusted. When the voltage is greater than the on-state voltage of the second MOSFET switch Q2, the second MOSFET switch Q2 turns on, the feedback pin FB is grounded, and the voltage at the feedback pin FB is pulled down from the reference voltage to 0 (equivalent to the second MOSFET switch Q2 outputting a second voltage signal to the voltage detection pin of the second power control chip IC2). The second power control chip IC2 then controls the power supply to turn off. In other words, the above control achieves power supply shutdown when the second switching unit S2 is turned off.

[0060] It is understood that, in some embodiments of this application, the third capacitor in the power switch circuit corresponding to the second power control chip IC2 can be a filter capacitor, used to smooth the voltage and avoid affecting the relevant control of power on or off when current disturbances occur.

[0061] In the power switch circuit described above, the voltage division state of the sixth resistor R6 and the seventh resistor R7 can be affected by the closing and closing of the second switch unit S2, thereby controlling the conduction or cutoff of the second MOSFET switch Q2. Based on the conduction or cutoff of the second MOSFET switch Q2, the feedback pin FB of the second power control chip IC2 receives the corresponding voltage feedback, thereby controlling the power supply to turn on and off. The sixth resistor R6 can be powered through the power supply pin VDD of the second power control chip IC2, so there is no need to sample the power supply itself. When the circuit is working, the second power control chip IC2 only needs to provide a power supply voltage V2 that can meet the control of the second MOSFET to conduct. Moreover, the power switch circuit set by the characteristics of the power supply pin VDD and the feedback pin FB of the second voltage control chip is simpler, the power supply voltage is lower, and the overall power switch circuit has lower energy consumption.

[0062] Specifically, the power consumption of the power switching circuit corresponding to the second voltage control chip IC2 is mainly... In typical circuit setups, the seventh resistor R7 has a resistance of 100kΩ, and the voltage V2 provided by the power supply pin VDD is 20V, corresponding to a power consumption of 4mW. Compared to the 1.5W of the prior art, the power switch circuit corresponding to the second voltage control chip provided in this application embodiment has significantly reduced power consumption, and it is also further reduced compared to the 17mW power switch circuit corresponding to the first voltage control chip provided in this application embodiment. In practical applications, the corresponding power switch circuit can be selected based on actual needs and the function of the corresponding chip pins to reduce the power switch control power consumption.

[0063] Furthermore, existing I / O switches are directly connected in series between the live wire and the power supply, handling a large current. This necessitates a corresponding increase in the specifications of the I / O switches (e.g., 10A / 16A switches). Larger I / O switch specifications also increase the cost. In contrast, the power switch circuit of this application handles a smaller current, and the corresponding switching unit (e.g., ...) Figure 2 and Figure 3 The specifications of the corresponding first and second switching units can be set to small-sized switches (such as switches with less than 1A), thereby reducing the cost of the corresponding devices.

[0064] In some embodiments of this application, a power supply system is also provided, which includes a power switch circuit and a power supply (such as an ATX power supply) as described above. The signal output terminal of the power control chip of the power switch circuit is connected to the pin of the main circuit control chip of the power supply. The power switch circuit is used to control the working state of the main circuit control chip of the power supply, thereby controlling the working state of the power supply. Specifically, by closing or opening the switching unit of the power switch circuit, the power control chip of the power switch circuit is in different working states, thereby outputting a corresponding voltage signal to the main circuit control chip inside the power supply to control the working state of the main circuit control chip, thereby controlling the working state of the entire power supply. For example, in an ATX power supply system, the aforementioned power switch circuit is located in the ATX's Standby power control chip (standby power control chip, i.e., the power control chip of this application). By closing / opening the switching unit (i.e., the I / O switch) of the power switch circuit, the Standby power control chip is in a working / non-working state. Based on the voltage signal output by the Standby power control chip in the working / non-working state, the working state of the main circuit control chip inside the ATX power supply is controlled accordingly, thereby controlling the working state of the entire power supply.

[0065] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.

[0066] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0067] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

[0068] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

Claims

1. A power switch circuit, characterized in that, include: Switching unit, voltage divider unit, transistor switching unit and power control chip; One end of the switching unit and the gate of the transistor switching unit are connected to one end of the voltage divider unit. The other end of the switching unit and the source of the transistor switching unit are grounded. The drain of the transistor switching unit is connected to the input terminal of the power control chip. The output terminal of the power control chip is connected to the input terminal of the power supply. The switching unit is used to control the voltage divider unit to be in a first voltage divider state when closed, and to control the voltage divider unit to be in a second voltage divider state when open; the voltage divider unit is used to control the transistor switching unit to be turned on when in the first voltage divider state, and to control the transistor switching unit to be turned off when in the second voltage divider state; the transistor switching unit is used to output a first voltage signal to the power control chip when in the on state, and to output a second voltage signal to the power control chip when in the off state; The power control chip is used to control the power supply to turn on after receiving the first voltage signal, and to control the power supply to turn off after receiving the second voltage signal.

2. The power switch circuit according to claim 1, characterized in that, The power control chip includes: a first power control chip; The first power control chip includes a voltage detection pin BR, which is connected to the drain of the switching transistor unit. After receiving the first voltage signal, the first power control chip controls the power supply to be turned on. After receiving the second voltage signal, the first power control chip controls the power supply to be turned off.

3. The power switch circuit according to claim 2, characterized in that, The voltage divider unit includes: a first voltage divider unit and a second voltage divider unit; The input terminals of the first voltage divider unit and the second voltage divider unit are both connected to the output terminal of the energy storage capacitor of the power supply. The first output terminal of the first voltage divider unit is connected to one end of the switching unit. The second output terminal of the first voltage divider unit is grounded. The first output terminal of the second voltage divider unit is connected to the drain of the switching transistor unit and the voltage detection pin BR of the first power control chip. The second output terminal of the second voltage divider unit is grounded.

4. The power switch circuit according to claim 3, characterized in that, The first voltage divider unit includes a first resistor and a second resistor, and the second voltage divider unit includes a third resistor and a fourth resistor; One end of the first resistor and one end of the third resistor are connected to the output terminal of the energy storage capacitor of the power supply. The other end of the first resistor, the gate of the transistor switching unit, and one end of the second resistor are connected to one end of the switching unit. One end of the second resistor is grounded. The other end of the third resistor, the drain of the transistor switching unit, and one end of the fourth resistor are all connected to the voltage detection pin BR of the first power control chip, and the other end of the fourth resistor is grounded.

5. The power switch circuit according to claim 4, characterized in that, The first voltage divider unit further includes: a first capacitor and a second capacitor; One end of the first capacitor is connected to one end of the second resistor, and the other end of the first capacitor is grounded; One end of the second capacitor is connected to one end of the fourth resistor, and the other end of the second capacitor is grounded.

6. The power switch circuit according to claim 4, characterized in that, Also includes: Fifth resistor; One end of the fifth resistor is connected to one end of the first resistor, and the other end of the fifth resistor is connected to the gate of the transistor switching unit.

7. The power switch circuit according to claim 1, characterized in that, The power control chip includes: a second power control chip; The second power control chip includes a feedback pin and a power supply pin. The feedback pin is connected to the drain of the switching transistor unit. After receiving the first voltage signal, the first power control chip controls the power supply to be turned on. After receiving the second voltage signal, the first power control chip controls the power supply to be turned off. The power supply pin is connected to the receiving end of the voltage divider unit. The power supply pin is used to provide voltage to the voltage divider unit after the first power control chip detects that the power supply is on.

8. The power switch circuit according to claim 7, characterized in that, The voltage divider unit includes: a sixth resistor and a seventh resistor; One end of the sixth resistor is connected to the power supply pin of the second power control chip, and the other end of the sixth resistor, the gate of the transistor switching unit, and one end of the seventh resistor are all connected to one end of the switching unit; the other end of the seventh resistor is grounded.

9. The power switch circuit according to claim 8, characterized in that, Also includes: Third capacitor; One end of the third capacitor is connected to one end of the seventh resistor, and the other end of the third capacitor is grounded.

10. A power supply system, characterized in that, The power supply system includes: a power switch circuit and a power supply as described in any one of claims 1 to 9; The signal output terminal of the power control chip of the power switch circuit is connected to the pin of the main circuit control chip of the power supply. The power switch circuit is used to control the working state of the main circuit control chip of the power supply, thereby controlling the working state of the power supply.

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