Power supply circuit, charging pile and computing device

Abstract

The application relates to the field of electronic technology, in particular to a power supply circuit, a charging pile and a computing device, the power supply circuit can comprise: a first switch circuit, a power factor correction (PFC) power circuit and a direct current conversion circuit connected in sequence; the power supply circuit further comprises a rectifier circuit and a first auxiliary power supply connected in sequence; the first auxiliary power supply is used for supplying power for a PFC controller; the PFC controller is used for controlling the working state of the PFC power circuit; the first auxiliary power supply is further connected with an output end of the PFC power circuit through a second switch circuit; when a load is in a standby state, the first switch circuit is turned off, the second switch circuit is turned off, and the rectifier circuit provides power for the first auxiliary power supply, so as to maintain the working of the PFC controller; when the load is in a working state, the first switch circuit is turned on, the second switch circuit is turned on, and the PFC power circuit provides power for the first auxiliary power supply, so as to maintain the working of the PFC controller. The scheme of the application reserves one power supply circuit and saves power consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronics, and in particular to a power supply circuit, a charging pile and a computing device. BACKGROUND

[0002] In actual applications, different types of electronic devices, such as servers, computers, vehicle-mounted terminals, etc., need uninterrupted power supply. Therefore, power supplies are usually configured redundantly, such as a power supply can include a power supply and an auxiliary power supply. The power supply can include a PFC (Power Factor Correction) power supply and a DCDC (Direct Current-Direct Current) converter. The auxiliary power supply can include a PFC auxiliary power supply and a DCDC auxiliary power supply.

[0003] However, the current power supply configuration is relatively redundant, resulting in high power consumption of the power supply, causing unnecessary energy waste. SUMMARY

[0004] The present application is proposed in view of the above problems. The embodiments of the present application provide a power supply circuit, a charging pile and a computing device.

[0005] According to an aspect of an embodiment of the present application, a power supply circuit is provided, and the power supply circuit comprises:

[0006] a first switch circuit, a PFC power circuit and a direct current conversion circuit connected in sequence; an input end of the first switch circuit is used for connecting an alternating current power supply, and an output end of the direct current conversion circuit is used for connecting a load.

[0007] The power supply circuit further comprises a rectifier circuit and a first auxiliary power supply connected in sequence; an input end of the rectifier circuit is used for connecting the alternating current power supply, and the first auxiliary power supply is used for supplying power to a PFC controller; and the PFC controller is used for controlling a working state of the PFC power circuit.

[0008] The PFC controller is further connected with an output end of the PFC power circuit through a second switch circuit;

[0009] In a standby state of the load, the first switch circuit is turned off, the second switch circuit is turned off, and the rectifier circuit provides power for the first auxiliary power supply to maintain the working of the PFC controller.

[0010] In a working state of the load, the first switch circuit is turned on, the second switch circuit is turned on, and the PFC power circuit provides power for the first auxiliary power supply to maintain the working of the PFC controller.

[0011] The joint use of the first switch circuit and the second switch circuit in the embodiment of the application can control the PFC power circuit or the rectifier circuit to supply power to the first auxiliary power supply, so that the power supply mode of the first auxiliary power supply is more flexible, and when the rectifier circuit is used for power supply, the PFC power circuit and the DC conversion circuit are both closed, so that the power consumption of the power supply is further reduced, and the energy consumption is saved.

[0012] In addition, according to the power supply circuit of one aspect of the application, the first switch circuit comprises: a first switch and a second switch connected in parallel with the AC power supply, a first resistor connected in series with the second switch, and the first switch and the first resistor connected with the PFC power circuit respectively.

[0013] The first switch circuit further comprises: a third switch and a fourth switch connected in parallel with the AC power supply, and a second resistor connected in series with the fourth switch, and the third switch and the second resistor connected with the PFC power circuit respectively.

[0014] In the embodiment of the application, by directly setting four switches in the first switch circuit, more direct and rapid on-off control of the first switch circuit can be realized, and higher efficiency and more accurate circuit control effect can be achieved.

[0015] In addition, according to the power supply circuit of one aspect of the embodiment of the application, the power supply circuit further comprises:

[0016] When the load is in the standby state, the PFC controller controls the first switch, the second switch, the third switch and the fourth switch to be turned off, and the rectifier circuit provides power for the first auxiliary power supply to maintain the operation of the PFC controller.

[0017] When the load enters the working state, the PFC controller closes the second switch and the fourth switch, and soft-starts the PFC power circuit and the DC conversion circuit, and the PFC controller closes the first switch and the third switch, and the PFC power circuit provides power for the first auxiliary power supply to maintain the operation of the PFC controller.

[0018] In the embodiment of the application, by setting the first switch circuit to comprise the first switch to the fourth switch, the power supply control of the AC power supply on the PFC power circuit is realized directly through the switches, and the power supply control efficiency and accuracy are improved.

[0019] In addition, according to the power supply circuit of one aspect of the embodiment of the application, the second switch circuit comprises: a first diode and a second diode, a positive electrode of the first diode connected with a positive power supply port of the PFC power circuit, a negative electrode of the first diode connected with a positive power supply port of the first auxiliary power supply circuit, a positive electrode of the second diode connected with a negative power supply port of the first auxiliary power supply, and a negative electrode of the second diode connected with a negative power supply port of the PFC power circuit.

[0020] In the embodiment of the present application, the first diode and the second diode are configured to form the second switch circuit, and the conduction or cutoff of the first diode and the second diode is directly affected by the working state of the PFC power circuit, so that the conduction or cutoff can be automatically realized, the second switch circuit is directly affected by the first switch circuit, the associated control of the first switch circuit and the second switch circuit can be completed without too many control instructions, the switching of the power supply mode of the PFC power circuit and the rectifier circuit can be quickly completed, and the control efficiency is improved.

[0021] In addition, according to the power supply circuit in an aspect of the embodiment of the present application, the power supply circuit further comprises: a third switch circuit connected with the rectifier circuit, and the third switch circuit is further connected with the first auxiliary power supply;

[0022] In the standby state of the load, the first switch circuit is turned off, the second switch circuit is turned off, and the third switch circuit is turned on, so that the rectifier circuit provides power for the first auxiliary power supply through the third switch circuit to maintain the working of the PFC controller;

[0023] In the working state of the load, the first switch circuit is turned on, the second switch circuit is turned on, and the third switch circuit is turned off, so that the PFC power circuit provides power for the first auxiliary power supply through the second switch circuit to maintain the working of the PFC controller.

[0024] In the embodiment of the present application, the third switch circuit is configured to control the on-off of the rectifier circuit, so that the operation of the rectifier circuit is more closely associated with the on-off state of the first switch circuit and the second switch circuit, more on-off control of the circuit is provided, the power supply control of the entire power supply circuit is more accurate, the circuit division of the power supply line of the rectifier circuit and the PFC power supply line is more clear, the power consumption is reduced, and the operation safety of the power supply circuit is effectively improved.

[0025] According to the power supply circuit in an aspect of the embodiment of the present application, the third switch circuit comprises: a third diode and a fourth diode, the positive electrode of the third diode is connected with the positive power supply port of the rectifier circuit, the negative electrode of the third diode is connected with the positive power supply port of the first auxiliary power supply, the positive electrode of the fourth diode is connected with the negative power supply port of the first auxiliary power supply, and the negative electrode of the fourth diode is connected with the negative power supply port of the rectifier circuit.

[0026] In the embodiment of the present application, the third diode and the fourth diode are configured to form the third switch circuit, and the conduction or cutoff control of the diode is more convenient, so that the accurate and effective on-off control of the third switch circuit can be quickly completed.

[0027] Further, according to an aspect of the power supply circuit, the power supply circuit further comprises: a DCDC auxiliary power supply connected with the first auxiliary power supply, and a DCDC controller connected with the DCDC auxiliary power supply; the DCDC controller is configured to control the DC-AC conversion circuit to work.

[0028] When the load is in the standby state, the DCDC controller controls the DC-AC conversion circuit to stop working.

[0029] When the load is in the working state, the DCDC controller controls the DC-AC conversion circuit to work.

[0030] In the embodiment, for the DCDC auxiliary power supply, a DCDC auxiliary power supply for driving the DCDC auxiliary power supply can be further included, and the DCDC auxiliary power supply can be connected with the DCDC controller and supply power to the DCDC controller. The DCDC controller can control the working of the DC-AC conversion circuit. Thus, under the influence of the load, the DC-AC conversion circuit is controlled by the DCDC controller to stop working in the standby state, and the DC-AC conversion circuit is controlled by the DCDC controller to start working in the working state. The unnecessary energy consumption of the DC-AC conversion circuit can be reduced as much as possible on the basis of ensuring the normal working of the power supply circuit, and the functional efficiency is further improved. Meanwhile, the working of the DC-AC conversion circuit is controlled by the DCDC controller, and thus the control of the DC-AC conversion circuit is more accurate, and the loss caused by the instability of the DC due to the instability of the voltage or current is avoided.

[0031] Further, according to an aspect of the power supply circuit, the PFC controller is provided with a CAN communication interface, the PFC controller is connected to the CAN bus through the CAN communication interface, and the DCDC controller is also connected to the CAN bus.

[0032] When the load is in the standby state, the PFC controller sends a sleep signal to the DCDC controller, and the DCDC controller is configured to control the DC-AC conversion circuit to stop working in response to the sleep signal.

[0033] When the load is switched to the working state, the PFC controller sends a wake-up signal to the DCDC controller, and the DCDC controller is configured to control the DC-AC conversion circuit to start working in response to the wake-up signal.

[0034] In the embodiment, the CAN communication interface is arranged on the PFC controller, so that the PFC controller can be connected to the CAN bus, and then the DCDC controller connected to the CAN bus can be communicated through the CAN bus, so that the control of the DC-AC conversion circuit by the DCDC controller is completed through the CAN communication module, the normal switching of the DC-AC conversion circuit can be completed in time, and the use of the DC-AC conversion circuit in different states is not affected.

[0035] Optionally, when the load is in the standby state, the PFC controller receives a wake-up signal sent by the CAN bus, and the wake-up signal is used to wake up the DCDC auxiliary power supply to work.

[0036] In the embodiment of the application, the PFC controller can receive a wake-up signal through the CAN bus, and the wake-up signal can be used to wake up the DCDC auxiliary power supply to work. The DCDC auxiliary power supply is affected by the PFC controller, and effective control of the DCDC auxiliary power supply can be started, that is, the PFC receives the wake-up signal to start controlling the DCDC auxiliary power supply, which can avoid unnecessary start of the DCDC auxiliary power supply and achieve effective energy saving.

[0037] In addition, according to an aspect of the power supply circuit in the embodiment of the application, the power supply circuit further comprises a DCDC driver connected with the DCDC auxiliary power supply.

[0038] When the load is in the standby state, the PFC controller controls the DCDC driver to close the DCDC auxiliary power supply and closes the DCDC driver.

[0039] When the load switches to the working state, the PFC controller controls the DCDC driver to start the DCDC driver and controls the DCDC driver to start the DCDC auxiliary power supply.

[0040] In the embodiment of the application, for the DCDC auxiliary power supply, a DCDC driver for driving the DCDC auxiliary power supply to work normally can also be included, and the DCDC driver can also be affected by the running state of the load, and can be closed in the standby state and started in the working state. On the basis of ensuring normal operation of the power supply circuit, unnecessary energy consumption of the circuit is reduced as much as possible, and the functional efficiency is further improved.

[0041] In addition, according to an aspect of the power supply circuit in the embodiment of the application, the power supply circuit further comprises a CAN communication module connected with the first auxiliary power supply.

[0042] The first auxiliary power supply is used to supply power for the CAN communication module to maintain normal work of the CAN communication module.

[0043] In the technical solution of the embodiment of the application, the CAN communication module is connected with the first auxiliary power supply, and the CAN communication module is not connected with the DCDC auxiliary power supply, so that when the load is in the standby state, the DCDC auxiliary power supply can be closed, and the energy consumption of the DCDC auxiliary power supply is reduced. At the same time, since the CAN module is directly connected to the first auxiliary power supply, the CAN communication is not affected on the basis of saving energy, and the normal communication of the power supply circuit is ensured.

[0044] According to another aspect of the embodiment of the application, a charging pile is provided, and the charging pile comprises the power supply circuit of any of the above.

[0045] According to another aspect of the embodiments of the present application, there is provided a computing device, comprising a load and a power supply circuit as any of the above, the load being electrically connected with the power supply circuit, the power supply circuit being configured to supply power to the load.

[0046] As will be described in detail below, according to the power supply circuit of the embodiments of the present application, the power supply circuit can be composed of two loops, which are a main loop comprising a first switching circuit, a PFC power circuit and a DC conversion circuit connected in sequence, and an auxiliary loop comprising a rectifier circuit and a first auxiliary power supply connected in sequence. And the input terminals of the first switching circuit and the rectifier circuit are connected with an AC power supply respectively, so that the AC power supply can supply power to the above two loops. In addition, the first auxiliary power supply is connected with the output terminal of the PFC power circuit through a second switching circuit, and the working state of the PFC power circuit can be controlled in combination with a PFC controller. Therefore, when the load is in a standby state, the first switching circuit and the second switching circuit can be turned off, the AC power supply can no longer be connected to the main loop, and at this time the PFC power circuit and the DC conversion circuit can no longer work normally, and the AC power supply provides power to the first auxiliary power supply through the rectifier circuit. When the load is in a standby state, the first switching circuit and the second switching circuit can be turned on, in this case, the PFC power circuit and the DC conversion circuit are used normally, so that the PFC power circuit can provide power to the first auxiliary power supply. Therefore, the first auxiliary power supply can be powered by the PFC power circuit or the rectifier circuit, so that the power supply mode of the first auxiliary power supply is more flexible, and when the rectifier circuit is used for power supply, the PFC power circuit and the DC conversion circuit are both turned off, which can further reduce the power consumption of the power supply and save energy consumption.

[0047] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the subject technology. BRIEF DESCRIPTION OF DRAWINGS

[0048] The foregoing and other objects, features and advantages of the present application will become more apparent from the following detailed description, which proceeds with reference to the accompanying drawings. The drawings are provided to illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application and to enable others skilled in the art to make and use the present application. In the drawings, like reference characters generally refer to like elements or steps throughout the drawings.

[0049] Figure 1 is a structural schematic diagram illustrating a power supply circuit according to an embodiment of the present application;

[0050] Figure 2 is a structural schematic diagram illustrating another power supply circuit according to an embodiment of the present application;

[0051] Figure 3 is another structural schematic diagram of a power supply circuit according to an embodiment of the present application;

[0052] Figure 4 is another structural schematic diagram of a power supply circuit according to an embodiment of the present application;

[0053] Figure 5 is a flow chart of a power supply control method according to an embodiment of the present application;

[0054] Figure 6 is a block diagram of a computing device according to an embodiment of the present application. DETAILED DESCRIPTION

[0055] In order to make the objectives, technical solutions and advantages of the present application more obvious, the following will describe the example embodiments according to the present application in detail with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein.

[0056] Figure 1 is a structural schematic diagram of a power supply circuit provided by an embodiment of the present application. The power supply circuit can include a first switch circuit 101, a PFC power circuit 102 and a direct current conversion circuit 103 connected in sequence; an input end of the first switch circuit 101 is used to connect an alternating current power supply 104, and an output end of the direct current conversion circuit 103 is used to connect a load 105.

[0057] The power supply circuit further includes a rectifier circuit 106 and a first auxiliary power supply 107 connected in sequence; an input end of the rectifier circuit 106 is used to connect the alternating current power supply 104, and the first auxiliary power supply 107 is used to supply power for a PFC controller 108; the PFC controller 108 is used to control a working state of the PFC power circuit 102. The first auxiliary power supply 107 is further connected with the PFC controller 108.

[0058] The first auxiliary power supply 107 is further connected with an output end of the PFC power circuit 102 through a second switch circuit 109.

[0059] In a standby state of the load 105, the first switch circuit 101 is turned off, the second switch circuit 109 is turned off, and the rectifier circuit 106 provides power for the first auxiliary power supply 107 to maintain the working of the PFC controller 108.

[0060] In a working state of the load 105, the first switch circuit 101 is turned on, the second switch circuit 109 is turned on, and the PFC power circuit 102 provides power for the first auxiliary power supply 107 to maintain the working of the PFC controller 108.

[0061] Optionally, the rectifier circuit 106 can be a rectifier filter circuit, for example, a bridge rectifier filter circuit.

[0062] Optionally, the first auxiliary power supply 107 can be a PFC auxiliary power supply. The PFC auxiliary power supply can include functions such as current stabilization and / or voltage stabilization and / or power factor correction. In addition, the PFC power circuit can also have functions such as current stabilization and / or voltage stabilization and / or power factor correction.

[0063] Optionally, the first switch circuit 101 can be a relay circuit, which can be used to control the on-off of the path between the PFC power circuit 102 and the AC power supply 104. For example, when the first switch circuit 101 is closed / conducting, the path between the AC power supply 104 and the PFC power circuit 102 is conducting, and the PFC power circuit 102 can work normally to supply power to the DC conversion circuit 103 and the first auxiliary power supply 107; when the first switch circuit 101 is open / non-conducting, the path between the AC power supply 104 and the PFC power circuit 102 is disconnected, and the PFC power circuit 102 cannot work normally to supply power to the DC conversion circuit 103 and the first auxiliary power supply 107.

[0064] The second switch circuit 109 can be a circuit used to control the PFC power circuit 102 to supply power to the first auxiliary power supply 107 in conjunction with the first switch circuit 101.

[0065] The on-off state of the second switch circuit 109 is consistent with the on-off state of the first switch circuit 101. That is, when the first switch circuit 101 is closed / conducting, the second switch circuit 109 is also closed / conducting; when the first switch circuit 101 is open / non-conducting, the second switch circuit 109 is also open / non-conducting.

[0066] The electronic components in the first switch circuit 101 are different from the electronic components in the second switch circuit 109. The second switch circuit 109 can be composed of diodes, that is, the on-off state of the second switch circuit 109 is controlled by the conducting or non-conducting state of the diodes.

[0067] It should be noted that the first switch circuit 101 and the second switch circuit 109 can be used jointly, for example, when the first switch circuit 101 is open, the second switch circuit 109 can be automatically closed without the need for excessive instruction control. For another example, when the first switch circuit 101 is closed, the second switch circuit 109 can be automatically opened.

[0068] Therefore, through the joint control of the first switch circuit 101 and the second switch circuit 109, one of the two power supply circuits, the PFC power circuit 102 and the first auxiliary power supply 107, can be retained, reducing the energy consumption of one circuit and effectively saving energy.

[0069] Optionally, the PFC controller 108 can be a microcontroller unit (MCU) chip. The PFC controller 108 can send a closing instruction or a conducting instruction to the first switching circuit 101, and the first switching circuit 101 can be closed / conducted under the action of the closing instruction or the conducting instruction. The PFC controller 108 can also send an opening instruction or a disconnecting instruction to the first switching circuit 101, and the first switching circuit 101 can be disconnected / off under the action of the opening instruction or the disconnecting instruction.

[0070] Further, the PFC controller can collect the running state of the load, which can be a standby state or a working state for example. And according to the running state of the load, the on-off state of the first switching circuit is determined.

[0071] By controlling the on-off state of the load in different working states respectively, precise power supply configuration is realized for different states, which can not only meet the basic operation demand in the off state, but also further optimize the use of electric energy, provide adaptive and stable power supply, improve the operation efficiency of the whole system, and reduce energy consumption.

[0072] The power supply circuit of the embodiment of the application can include a first switching circuit, a PFC power circuit, and a direct current conversion circuit connected in sequence, and a rectifier circuit and a first auxiliary power supply connected in sequence. And the input terminals of the first switching circuit and the rectifier circuit are connected to an alternating current power supply respectively, so that the alternating current power supply can supply power to the above two circuits. In addition, the first auxiliary power supply is connected to the output terminal of the PFC power circuit through a second switching circuit, and the working state of the PFC power circuit can be controlled by the PFC controller. Therefore, when the load is in a standby state, the first switching circuit and the second switching circuit can be off, and the alternating current power supply cannot be connected to the main circuit, so that the PFC power circuit and the direct current conversion circuit cannot work normally, and the alternating current power supply provides power to the first auxiliary power supply through the rectifier circuit. When the load is in a standby state, the first switching circuit and the second switching circuit can be conducted, and in this case, the PFC power circuit and the direct current conversion circuit are used normally, so that the PFC power circuit can provide power to the first auxiliary power supply. Therefore, the first auxiliary power supply can be powered by the PFC power circuit or the rectifier circuit, so that the power supply mode of the first auxiliary power supply is more flexible, and when the rectifier circuit is used for power supply, the PFC power circuit and the direct current conversion circuit are both off, which can further reduce the power consumption of the power supply and save energy.

[0073] As Figure 2The diagram shown is another structural schematic of a power supply circuit provided in an embodiment of this application. The difference from the previous embodiment is that the power supply circuit further includes a third switching circuit 110 connected to the rectifier circuit 106, and the third switching circuit 110 is also connected to the first auxiliary power supply 107.

[0074] When the load 105 is in standby mode, the first switching circuit 101 is turned off, the second switching circuit 109 is turned off, and the third switching circuit 110 is turned on. The rectifier circuit 106 provides power to the first auxiliary power supply 107 via the third switching circuit 110 to maintain the operation of the PFC controller 108.

[0075] When the load 105 is working, the first switching circuit 101 is turned on, the second switching circuit 109 is turned on, and the third switching circuit 110 is turned off. The PFC power circuit 102 provides power to the first auxiliary power supply 107 via the second switching circuit 109 to maintain the operation of the PFC controller 108.

[0076] In this embodiment, by setting a third switching circuit, the on / off control of the rectifier circuit is realized, so that the operation of the rectifier circuit is more closely related to the on / off state of the first and second switching circuits, providing more circuit on / off control, ensuring more precise power supply control of the entire power supply circuit, making the circuit separation between the power supply line of the rectifier circuit and the power supply line of the PFC more clear, reducing power consumption, and effectively improving the operational safety of the power supply circuit.

[0077] like Figure 3 The diagram shown is another structural schematic of a power supply circuit provided in this application embodiment. The difference from the previous embodiment is that the power supply circuit further includes: a DC-DC auxiliary power supply 111 connected to the first auxiliary power supply 107, and a DC-DC controller 112 connected to the DC-DC auxiliary power supply 111; the DC-DC controller 112 is used to control the working state of the DC-DC converter circuit 103 / DCDC auxiliary power supply 111.

[0078] When load 105 is in standby mode, DC-DC controller 112 controls DC-DC converter circuit 103 to stop working.

[0079] When load 105 is in operation, DC-DC controller 112 controls DC-DC converter circuit 103 to operate.

[0080] Optionally, the DC-DC auxiliary power supply 111 may include functions such as analog-to-digital (A / D) conversion and / or voltage conversion (e.g., high-voltage to low-voltage or low-voltage to high-voltage).

[0081] In the embodiments of the present application, for the DCDC auxiliary power supply, a driving circuit for driving the DCDC auxiliary power supply can be further included, and the DCDC auxiliary power supply can be affected by the running state of the load, and is closed in the standby state and started in the working state. On the basis of ensuring the normal operation of the power supply circuit, the energy consumption of unnecessary circuits can be reduced as much as possible, and the functional efficiency is further improved.

[0082] In some embodiments, the PFC controller 108 is provided with a CAN communication interface (not shown in the figure), and the PFC controller 108 accesses the CAN bus (not shown in the figure) through the CAN communication interface. The DCDC controller 112 is also connected to the CAN bus.

[0083] Optionally, when the load 105 is in the standby state, the PFC controller 108 sends a sleep signal to the DCDC controller 112, and the DCDC controller 112 is configured to control the DC conversion circuit 103 to be closed in response to the sleep signal.

[0084] Optionally, when the load 105 switches to the working state, the PFC controller 108 sends a wake-up signal to the DCDC controller 112, and the DCDC controller 112 is configured to control the DC conversion circuit 103 to be started in response to the wake-up signal.

[0085] In the embodiments of the present application, by providing the CAN communication interface on the PFC controller, the PFC controller can access the CAN bus, and then can communicate with each module hanging on the CAN bus through the CAN bus, so that when the load runs in different states, the normal switching of the power supply circuit can be completed, and the use of the power supply circuit in different states is not affected.

[0086] Optionally, in the standby state, the PFC controller 108 receives a wake-up signal sent by the CAN bus, and the wake-up signal is used to wake up the DCDC auxiliary power supply 111 to work.

[0087] Optionally, in the working state, the PFC controller receives a sleep signal sent by the CAN bus, and the sleep signal is used to stop the DCDC auxiliary power supply from working.

[0088] It can be understood that the PFC controller can receive signals such as the wake-up signal or the sleep signal sent by the CAN bus, so as to control the DCDC auxiliary power supply to work according to the received signal.

[0089] In the embodiments of the present application, the PFC controller can receive the wake-up signal through the CAN bus, and the wake-up signal can be used to wake up the DCDC auxiliary power supply to work. The DCDC auxiliary power supply is affected by the FPC controller, and effective control of the DCDC auxiliary power supply can be started, that is, the PFC receives the wake-up signal and then starts to control the DCDC auxiliary power supply, which can avoid unnecessary start of the DCDC auxiliary power supply and achieve effective energy saving.

[0090] Reference Figure 3 In some embodiments, the first auxiliary power supply 107 is also connected to the CAN bus, and the power supply circuit further comprises a CAN communication module 113 connected to the first auxiliary power supply 107, and the first auxiliary power supply 107 is used to supply power to the CAN communication module 113 to maintain the normal operation of the CAN communication module 113.

[0091] For example, the CAN communication module can be a serial communication protocol related module widely used in many fields such as automobiles, industrial control, automation equipment, etc.

[0092] Taking the electronic system of an automobile as an example, various electronic control systems in the automobile, such as the engine management system, the transmission control system, the vehicle body electronic stability system, the airbag system, etc., are connected to each other through the CAN module to realize data sharing and cooperative work, thereby improving the performance, safety and comfort of the automobile.

[0093] Taking industrial control as an example, the CAN communication module can be used for communication between various industrial equipment, such as numerical control machine tools, robots, automated production lines, etc. Through the CAN module, remote control, state monitoring and data acquisition of industrial equipment can be realized, thereby improving the efficiency and intelligent level of industrial production.

[0094] In addition, the CAN communication module can also be applied to different degrees in the fields of aerospace, ships, intelligent buildings, medical devices, etc., for example, it can be used in intelligent buildings to realize communication between different devices in the building automation system, and in medical devices to work cooperatively between devices to provide better medical services. In the present application, they will not be described one by one.

[0095] In the technical solution of the present application, the CAN communication module is connected to the first auxiliary power supply, and the connection between the CAN communication module and the DCDC auxiliary power supply is disconnected, so that the DCDC auxiliary power supply can be turned off when the load is in standby state, thereby reducing the energy consumption of the DCDC auxiliary power supply. At the same time, since the CAN module is directly connected to the first auxiliary power supply, the CAN communication is not affected on the basis of saving energy, and the normal communication of the power supply circuit is ensured.

[0096] Reference Figure 3In some embodiments, the power supply circuit further comprises a DCDC driver 114 connected with the DCDC auxiliary power supply 111.

[0097] When the load 105 is in the standby state, the PFC controller 108 controls the DCDC driver 114 to turn off the DCDC auxiliary power supply 111.

[0098] When the load 105 switches to the working state, the PFC controller 108 controls the DCDC driver 114 to start and controls the DCDC driver 114 to start the DCDC auxiliary power supply 111.

[0099] In the embodiments of the present application, for the DCDC auxiliary power supply, a DCDC driver for driving the DCDC auxiliary power supply to work normally can also be included, and the DCDC driver can also be affected by the running state of the load, and is turned off in the standby state and started in the working state. On the basis of ensuring the normal operation of the power supply circuit, the energy consumption of unnecessary circuits can be reduced as much as possible, and the functional efficiency is further improved.

[0100] Reference Figure 3 In some embodiments, the power supply circuit further comprises a PFC driver 115 and / or a PFC fan power supply 116 connected with the first auxiliary power supply 107.

[0101] The PFC driver 115 is used to control the driving of the first auxiliary power supply 107.

[0102] The PFC fan power supply 116 is used to supply power to a PFC fan (not shown in the figure) to maintain the operation of the PFC fan, and the operation of the PFC fan can cool the first auxiliary power supply 107.

[0103] When the load is in the standby state, the PFC driver 115 can stop working and / or the PFC fan power supply 116 can stop working. When the load is in the working state, the PFC driver 115 can work and / or the PFC fan power supply 116 can work.

[0104] It can be understood that the working states of the components (such as the first switching circuit 101, the PFC power circuit 102, the direct current conversion circuit 103, the second switching circuit 109, the third switching circuit 110, the DCDC auxiliary power supply 111, the DCDC controller 112, the DCDC driver 114, the PFC driver 115, and the PFC fan power supply 116) in the embodiments of the present application can be associated with the working state of the load, and the working states of the components can be switched when the working state of the load is switched.

[0105] When the load switches from the working state to the standby state, the first switch circuit 101 can be turned off, the second switch circuit 109 can be turned off, the third switch circuit can be turned on, the PFC power circuit 102 or the DC conversion circuit 103 can stop working, the DCDC auxiliary power supply 111, the DCDC controller 112 or the DCDC driver 114 can stop working, and the PFC driver 115 or the PFC fan power supply 116 can stop working.

[0106] When the load switches from the standby state to the working state, the first switch circuit 101 can be turned on, the second switch circuit 109 can be turned on, the third switch circuit can be turned off, the PFC power circuit 102 or the DC conversion circuit 103 can work, the DCDC auxiliary power supply 111, the DCDC controller 112 or the DCDC driver 114 can work, and the PFC driver 115 or the PFC fan power supply 116 can work.

[0107] In the embodiment, the first auxiliary power supply can also include the PFC fan power supply, which can be affected by the running state of the load and be turned off in the standby state and turned on in the working state. The power consumption of unnecessary circuits can be reduced on the basis of ensuring normal cooling of the power supply circuit, the energy utilization efficiency of the entire power supply circuit is further improved, and energy waste is avoided.

[0108] For the convenience of understanding, the various circuits in the power supply circuit are described in detail below.

[0109] As shown in FIG. 1, a power supply circuit provided by the embodiment includes an AC power supply 104, a first switch circuit 101, a PFC power circuit 102, a DC conversion circuit 103, a DCDC auxiliary power supply 111, a DCDC controller 112, a DCDC driver 114, a PFC driver 115 and a PFC fan power supply 116. Figure 4 As shown in FIG. 2, another structure of the power supply circuit provided by the embodiment is different from the foregoing embodiment in that the first switch circuit 101 can include a first switch 1011 and a second switch 1012 connected in parallel with the AC power supply 104, a first resistor 1013 connected in series with the second switch 1012, and the first switch 1011 and the first resistor 1013 connected with the PFC power circuit 102 respectively.

[0110] The first switch circuit 101 further includes a third switch 1014 and a fourth switch 1015 connected in parallel with the AC power supply 104, a second resistor 1016 connected in series with the fourth switch 1015, and the third switch 1014 and the second resistor 1016 connected with the PFC power circuit 102 respectively.

[0111] In the embodiment, by directly setting four switches in the first switch circuit, more direct and rapid on-off control of the first switch circuit can be realized, and higher and more accurate circuit control effect can be achieved.

[0112] Further, on the basis of any of the above embodiments, when the load is in the standby state, the PFC controller 108 controls the first switch 1011, the second switch 1012, the third switch 1014, and the fourth switch 1015 to be turned off, and the rectifier circuit 106 provides power for the first auxiliary power supply 107 to maintain the operation of the PFC controller 108.

[0113] When the load 105 enters the working state, the PFC controller 108 closes the second switch 1012 and the fourth switch 1015 to soft-start the PFC power circuit 102 and the DC conversion circuit 103, and the PFC controller 108 closes the first switch 1011 and the third switch 1014, and the PFC power circuit 102 provides power for the first auxiliary power supply 107 to maintain the operation of the PFC controller 108.

[0114] In the embodiments of the present application, the first switch circuit includes the first switch to the fourth switch, and the power supply control of the AC power supply on the PFC power circuit is directly realized through the switches, thereby improving the power supply control efficiency and accuracy.

[0115] Reference Figure 4 In some embodiments, the second switch circuit 109 includes a first diode 1091 and a second diode 1092, the positive electrode of the first diode 1091 is connected to the positive power supply port of the PFC power circuit 102, the negative electrode of the first diode 1091 is connected to the positive power supply port of the first auxiliary power supply 107, the positive electrode of the second diode 1092 is connected to the negative power supply port of the first auxiliary power supply 107, and the negative electrode of the second diode 1092 is connected to the negative power supply port of the PFC power circuit 102.

[0116] It can be understood that when the first switch circuit 101 is turned off, the PFC power circuit 102 cannot work normally, and the rectifier circuit 106 supplies power for the first auxiliary power supply 107. At this time, the positive electrode of the first diode 1091 is connected to a low level, the negative electrode of the first diode 1091 is connected to a high level, and the first diode 1091 is cut off. The negative electrode of the second diode 1092 is connected to a low level, the positive electrode of the second diode 1092 is connected to a low level, and the second diode 1092 is cut off. The first diode 1091 and the second diode 1092 are both cut off, which means that the second switch circuit 109 is turned off.

[0117] It can also be understood that when the first switch circuit 101 is turned on, the PFC power circuit 102 works normally, and the rectifier circuit 106 does not supply power for the first auxiliary power supply 107. At this time, the positive electrode of the first diode 1091 is connected to a high level, and the negative electrode is connected to a low level, and the first diode 1091 is turned on. The positive electrode of the second diode 1092 is connected to a high level, and the negative electrode is connected to a low level, and the second diode 1092 is turned on. The first diode 1091 and the second diode 1092 are both turned on, which means that the second switch circuit 109 is turned on.

[0118] In the embodiments of the present application, the first diode and the second diode are arranged to specifically constitute the second switch circuit, and the conduction or the cutoff of the first diode and the second diode is directly affected by the working state of the PFC power circuit, so that the conduction or the cutoff can be automatically realized, the second switch circuit is directly affected by the first switch circuit, the associated control of the first switch circuit and the second switch circuit can be completed without too many control instructions, the switching of the power supply mode of the PFC power circuit and the rectifier circuit can be quickly completed, and the control efficiency is improved.

[0119] Reference Figure 4 In some embodiments, the third switch circuit 110 includes a third diode 1101 and a fourth diode 1102, the positive electrode of the third diode 1101 is connected to the positive power port of the rectifier circuit 106, the negative electrode of the third diode 1101 is connected to the positive power port of the first auxiliary power supply 107, the positive electrode of the fourth diode 1102 is connected to the negative power port of the first auxiliary power supply 107, and the negative electrode of the fourth diode 1102 is connected to the negative power port of the rectifier circuit 106.

[0120] It can be understood that when the first switch circuit 101 is off, the PFC power circuit 102 cannot work normally, and the rectifier circuit 106 supplies power to the first auxiliary power supply 107. At this time, the positive electrode of the third diode 1101 is connected to a high level, the negative electrode is connected to a high level, no potential difference can be formed, and the third diode 1101 is cut off. The positive electrode of the fourth diode 1102 is connected to a low level, the negative electrode is connected to a low level, and no potential difference can be formed, and the fourth diode 1102 is cut off. When the third diode 1101 and the fourth diode 1102 are both cut off, it means that the third switch circuit 110 is off.

[0121] It can also be understood that when the first switch circuit 101 is on, the PFC power circuit 102 works normally, and the rectifier circuit 106 does not supply power to the first auxiliary power supply 107. At this time, the positive electrode of the third diode 1101 is connected to a high level, and the negative electrode is connected to a low level, so that a potential difference can be formed, and the third diode 1101 is turned on. The positive electrode of the fourth diode 1102 is connected to a high level, and the negative electrode is connected to a low level, so that a potential difference can be formed, and the fourth diode 1102 is turned on. When the third diode 1101 and the fourth diode 1102 are both turned on, it means that the third switch circuit 110 is turned on.

[0122] In the embodiments of the present application, the third diode and the fourth diode are arranged to specifically constitute the third switch circuit, and the conduction or the cutoff control of the diode is more convenient, so that the accurate and effective on-off control of the third switch circuit can be quickly completed.

[0123] Reference Figure 4In some embodiments, the rectifier circuit 106 can include a fifth diode 1061 and a sixth diode 1062, the positive pole of the fifth diode 1061 and the negative pole of the sixth diode 1062 are connected, and the positive pole of the fifth diode 1061 and the negative pole of the sixth diode 1062 are connected to the AC power supply 104.

[0124] The rectifier circuit 106 can further include a seventh diode 1063 and an eighth diode 1064. The positive pole of the seventh diode 1063 and the negative pole of the eighth diode are connected. The positive pole of the seventh diode 1063 and the negative pole of the eighth diode 1064 are grounded.

[0125] The negative pole of the fifth diode 1061 and the negative pole of the seventh diode 1063 are connected, serving as the positive power port of the rectifier circuit 106.

[0126] The positive pole of the sixth diode 1062 and the positive pole of the eighth diode 1064 are connected, serving as the negative power port of the rectifier circuit 106.

[0127] The rectifier circuit 106 can further include a first capacitor 1065 connected to the negative pole of the seventh diode 1063, a second capacitor 1066 connected in series with the first capacitor 1065, and the second capacitor 1066 connected to the positive pole of the eighth diode 1064.

[0128] Specifically, the first end of the first capacitor 1065 is connected to the negative pole of the seventh diode 1063, the second end is connected to the first end of the second capacitor 1066, and the second end of the second capacitor 1066 is connected to the positive pole of the eighth diode 1064.

[0129] Optionally, the AC power supply 104 supplies power to the rectifier circuit 106 via the fifth diode 1061 and the sixth diode 1062.

[0130] Specifically, during the positive half cycle of the AC power, the fifth diode 1061 and the eighth diode 1064 are turned on, and the sixth diode 1062 and the eighth diode 1064 are turned off. At this time, the positive and negative ports of the rectifier circuit 106 can form a potential difference to supply power to the first auxiliary power supply 107.

[0131] During the negative half cycle of the AC power, the fifth diode 1061 and the eighth diode 1064 are turned off, and the sixth diode 1062 and the eighth diode 1064 are turned on. At this time, the positive and negative ports of the rectifier circuit 106 can also form a potential difference to supply power to the first auxiliary power supply 107.

[0132] Of course, whether the rectifier circuit 106 can supply power to the first auxiliary power supply 107 is also affected by the third switch circuit 110. For details, please refer to the description of other embodiments, which will not be repeated here.

[0133] ReferenceFigure 4 In some embodiments, a capacitor can be connected between the PFC power circuit 102 and the DC conversion circuit 103. Specifically, the positive power port of the PFC power circuit 102 is connected to one end of a third capacitor 117, and the other end of the third capacitor 117 is connected to the DC conversion circuit 103. The negative power port of the PFC power circuit 102 is connected to one end of a fourth capacitor 118, and the other end of the fourth capacitor 118 is connected to the DC conversion circuit 103.

[0134] In the embodiments of the present application, the connection relationship between the various key circuit components in the power supply circuit is clearly described, and the on-off control is more clear and convenient through the connection relationship of the above-mentioned circuit components, the control efficiency of the power supply is improved, and the energy saving effect is effectively improved.

[0135] As shown in FIG. 1, a flowchart of a power supply control method is provided in the embodiments of the present application. The power supply control method can be applied to a PFC controller in a power supply circuit. The power supply circuit can be any one of the above-mentioned power supply circuits, and the power supply control method can include the following steps: Figure 5 Figures 1-4 S501, collect the running state of the load, which is a working state or a standby state.

[0136] S502, according to the running state, the on-off control of the first switch circuit and the second switch circuit in the power supply is performed to control the PFC power circuit or the rectifier circuit to supply power to the first auxiliary circuit.

[0137]

[0138] Optionally, the power supply control method can further include: in the case where the running state is the standby state, controlling the first switch circuit and the second switch circuit to be both turned off, and the rectifier circuit provides power to the first auxiliary power supply to maintain the working of the PFC controller.

[0139] In the case where the running state is the working state, the first switch circuit and the second switch circuit are controlled to be both turned on, and the PFC power circuit provides power to the first auxiliary power supply to maintain the working of the PFC controller.

[0140] Optionally, the power supply control method can further include: in the case where the running state is the standby state, controlling the DCDC auxiliary power supply to be turned off.

[0141] Further, the power supply control method can further include:

[0142] In the case where the load is in the standby state, a sleep signal is sent to the DCDC controller, and the DCDC controller is used to control the DC conversion circuit to be turned off in response to the sleep signal.

[0143] ​​When the load switches to the working state, a wake-up signal is sent to the DCDC controller, and the DCDC controller is configured to control the DC-DC conversion circuit to start in response to the wake-up signal.

[0144] Optionally, the power supply control method can further include: in the case that the running state is the working state, controlling the DCDC auxiliary power supply to operate normally.

[0145] Further, the power supply control method can further include:

[0146] In the working state, a sleep signal sent by the CAN bus is received, and the sleep signal is used to stop the DCDC auxiliary power supply from working.

[0147] In the standby state, a wake-up signal sent by the CAN bus is received, and the wake-up signal is used to wake up the DCDC auxiliary power supply to work.

[0148] Further, the power supply control method can further include:

[0149] In the standby state of the load, the DCDC driver is controlled to turn off the DCDC auxiliary power supply, and the DCDC driver is turned off.

[0150] In the case that the load switches to the working state, the DCDC driver is controlled to start, and the DCDC driver is controlled to start the DCDC auxiliary power supply.

[0151] It can be understood that the execution subject of the power supply control method can be the PFC controller in the above-mentioned embodiments, so as to realize effective switching of various components in the terminal.

[0152] The power supply control method provided by the application can first collect the running state of the load, can timely obtain the working condition of the load or the power supply, and can determine whether the load or the power supply is in the working state or the standby state, so as to provide a key basis for subsequent targeted control operations. Then, the first switch circuit and the second switch circuit in the power supply are controlled to be turned on or turned off according to the running state, the power supply is accurately allocated according to the actual demand of the load, unnecessary circuit loss is avoided, the utilization efficiency of the power supply can be effectively improved, energy waste can be reduced, and the operation cost of the whole system can be reduced.

[0153] As Figure 6 Fig. 6 is a structural schematic diagram of a computing device provided by an embodiment of the application. The computing device 600 can include a load 601 and one or more power supply circuits 602 as described above. The power supply circuit 602 is electrically connected to the load 601, and the power supply circuit 602 is configured to supply power to the load.

[0154] The computing device can include a server or a terminal device.

[0155] In addition, the application also provides a charging pile, and the charging pile includes any one of the power supply circuits described above.

[0156] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0157] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0158] Additionally, as used herein, the “or” used in a list of items beginning with “at least one” indicates a separate list, such that a list of, for example, “at least one of A, B, or C” means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word “exemplary” does not imply that the described example is preferred or better than other examples.

[0159] It should also be noted that in the system and method of this application, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of this application.

[0160] Various changes, substitutions, and modifications can be made to the technology herein without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims is not limited to the specific aspects of the processes, machines, manufactures, events, means, methods, and actions described above. Currently existing or later-developed processes, machines, manufactures, events, means, methods, or actions that perform substantially the same function or achieve substantially the same result as the corresponding aspects herein can be utilized. Therefore, the appended claims include such processes, machines, manufactures, events, means, methods, or actions within their scope.

[0161] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0162] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A power supply circuit, characterized in that, It includes a first switching circuit, a power factor correction (PFC) power circuit, and a DC-DC converter circuit connected in sequence; the input terminal of the first switching circuit is used to connect to an AC power source, and the output terminal of the DC-DC converter circuit is used to connect to a load. The power supply circuit also includes a rectifier circuit and a first auxiliary power supply connected in sequence; the input terminal of the rectifier circuit is used to connect to the AC power supply, and the first auxiliary power supply is used to power the PFC controller; the PFC controller is used to control the operating state of the PFC power circuit. The first auxiliary power supply is also connected to the output terminal of the PFC power circuit via a second switching circuit; When the load is in standby mode, the first switching circuit is turned off, the second switching circuit is turned off, and the rectifier circuit provides power to the first auxiliary power supply to maintain the operation of the PFC controller. When the load is in operation, the first switching circuit is turned on, the second switching circuit is turned on, and the PFC power circuit provides power to the first auxiliary power supply to maintain the operation of the PFC controller. The first switching circuit includes: a first switch and a second switch connected in parallel to the AC power supply, a first resistor connected in series with the second switch, and the first switch and the first resistor are respectively connected to the PFC power circuit. The first switching circuit further includes: a third switch and a fourth switch connected in parallel to the AC power supply, a second resistor connected in series with the fourth switch, and the third switch and the second resistor respectively connected to the PFC power circuit; When the load is in standby mode, the PFC controller controls the first switch, the second switch, the third switch and the fourth switch to turn off, and the rectifier circuit provides power to the first auxiliary power supply to maintain the operation of the PFC controller. When the load enters the working state, the PFC controller closes the second switch and the fourth switch to soft-start the PFC power circuit and the DC-DC converter circuit. The PFC controller closes the first switch and the third switch, and the PFC power circuit provides power to the first auxiliary power supply to maintain the operation of the PFC controller.

2. The power supply circuit according to claim 1, characterized in that, The second switching circuit includes a first diode and a second diode. The anode of the first diode is connected to the positive power supply port of the PFC power circuit, the cathode of the first diode is connected to the positive power supply port of the first auxiliary power supply circuit, the anode of the second diode is connected to the negative power supply port of the first auxiliary power supply, and the cathode of the second diode is connected to the negative power supply port of the PFC power circuit.

3. The power supply circuit according to claim 1, characterized in that, The power supply circuit further includes: a third switching circuit connected to the rectifier circuit, and the third switching circuit is also connected to the first auxiliary power supply; When the load is in standby mode, the first switching circuit is turned off, the second switching circuit is turned off, and the third switching circuit is turned on. The rectifier circuit provides power to the first auxiliary power supply via the third switching circuit to maintain the operation of the PFC controller. When the load is in operation, the first switching circuit is turned on, the second switching circuit is turned on, and the third switching circuit is turned off. The PFC power circuit provides power to the first auxiliary power supply via the second switching circuit to maintain the operation of the PFC controller.

4. The power supply circuit according to claim 3, characterized in that, The third switching circuit includes a third diode and a fourth diode. The anode of the third diode is connected to the positive power supply port of the rectifier circuit, the cathode of the third diode is connected to the positive power supply port of the first auxiliary power supply, the anode of the fourth diode is connected to the negative power supply port of the first auxiliary power supply, and the cathode of the fourth diode is connected to the negative power supply port of the rectifier circuit.

5. The power supply circuit according to claim 1, characterized in that, The power supply circuit further includes: a DC-DC converter auxiliary power supply connected to the first auxiliary power supply, and a DC-DC controller connected to the DC-DC auxiliary power supply; the DC-DC controller is used to control the operation of the DC-DC converter circuit. When the load is in standby mode, the DC-DC controller controls the DC-DC converter circuit to stop working; When the load is in operation, the DC-DC controller controls the DC-DC converter circuit to operate.

6. The power supply circuit according to claim 5, characterized in that, The PFC controller is equipped with a controller area network (CAN) communication interface. The PFC controller is connected to the CAN bus through the CAN communication interface. The DC-DC controller is also connected to the CAN bus. When the load is in standby mode, the PFC controller sends a sleep signal to the DC-DC controller, and the DC-DC controller responds to the sleep signal to control the DC-DC converter circuit to shut down. When the load switches to the working state, the PFC controller sends a wake-up signal to the DC-DC controller, and the DC-DC controller responds to the wake-up signal to control the DC-DC converter circuit to start.

7. The power supply circuit according to claim 6, characterized in that, Also includes: In standby mode, the PFC controller receives a wake-up signal sent by the CAN bus, which is used to wake up the DC-DC auxiliary power supply.

8. The power supply circuit according to claim 7, characterized in that, The power supply circuit further includes: a DC-DC driver connected to the DC-DC auxiliary power supply; When the load is in standby mode, the PFC controller controls the DC-DC driver to turn off the DC-DC auxiliary power supply and shut down the DC-DC driver. When the load switches to the working state, the PFC controller controls the DC-DC driver to start, and controls the DC-DC driver to start the DC-DC auxiliary power supply.

9. The power supply circuit according to claim 6, characterized in that, The power supply circuit further includes: a CAN communication module connected to the first auxiliary power supply; The first auxiliary power supply is used to power the CAN communication module to maintain its normal operation.

10. A charging pile, characterized in that, The charging pile includes a power supply circuit as described in any one of claims 1-9.

11. A computing device, characterized in that, The computing device includes a load and a power supply circuit as described in any one of claims 1-9, wherein the load is connected to the power supply circuit, and the power supply circuit is used to supply power to the load.

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