Power control circuit and its control method

Abstract

A power control circuit and a control method thereof, the circuit comprising a power supply module, a voltage change signal module, an output module, a first switch module and a second switch module; the power supply module outputs power supply with different power through two output terminals according to the output of the external power supply terminal and the received first control signal; the output module supplies power supply to the information processing system connected with the output module; and transmits the trigger signal provided by the information processing system to the voltage change signal module; the first switch module and the second switch module disconnect and conduct the power supply channel between the output module and the power supply module according to the received second control signal and the third control signal; the voltage change signal module outputs the first control signal to the power supply module according to the trigger signal; and outputs the second control signal and the third control signal to the first switch module and the second switch module respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of information processing. In particular, it relates to a power control circuit and a control method thereof. BACKGROUND

[0002] The power delivery protocol (USB PD, USB Power Delivery) is widely used in the market due to its 5-20V variable output voltage. The common USB PD adapter on the market is mostly 65W, and the topology architecture is a flyback converter. However, in recent years, with the improvement of the performance of notebook computers, the requirement for the USB PD power level is also getting higher and higher. However, due to the inductance energy storage characteristics of the flyback converter, it is not suitable for high-power applications. Therefore, the industry provides a solution, which uses a resonant circuit LLC as the main output to ensure the full-load efficiency, and adds a step-down conversion circuit Buck to provide low-voltage output. The output of the LLC is connected to the output of the Buck through a switch tube, and then provides power to the system through an output module (USB-C, USB Type-C Connector). At the same time, the system controls the adapter to switch the output voltage through the USB-C. However, in this solution, the external system does not directly power on after accessing AC through the adapter, and has not communicated with the system in advance, so there is a problem of overvoltage and overcurrent. SUMMARY

[0003] The present application aims to provide a power control circuit and a control method thereof, which can meet the requirements of the power delivery protocol, improve the applicability of the power control circuit, and realize overvoltage and overcurrent protection for the external system, thereby avoiding damage to the system.

[0004] To achieve the above object, the power control circuit comprises a power supply module, a voltage change signal module, an output module, a first switch module and a second switch module; the power supply module is configured to output power supply with different power through two output ends according to the output of an external power supply end and a received first control signal; the output module is connected with the two output ends of the power supply module and configured to supply the power supply to an information processing system connected with the output module; and a trigger signal provided by the information processing system is transmitted to the voltage change signal module; the first switch module and the second switch module are respectively arranged between the two output ends of the power supply module and the output module, the first switch module is configured to disconnect and conduct the power supply channel between the one output end of the output module and the power supply module according to a received second control signal; the second switch module is configured to disconnect and conduct the power supply channel between the other output end of the output module and the power supply module according to a received third control signal; the voltage change signal module is connected with the first switch module, the second switch module, the power supply module and the output module respectively, and configured to output the first control signal to the power supply module according to the trigger signal; and output the second control signal and the third control signal to the first switch module and the second switch module respectively.

[0005] In an embodiment of the present application, optionally, the power supply module comprises a first power supply unit and a second power supply unit; the first power supply unit is connected with the output module through the first switch module and configured to provide power supply with first power according to the output of the external power supply end; the second power supply unit is connected with the second switch module, the voltage change signal module and the first power supply unit respectively and configured to provide power supply with second power after conversion according to the first control signal.

[0006] In an embodiment of the present application, optionally, the second power supply unit comprises a DC-DC converter, a third switch module, a fourth switch module and an inductor module; the input end of the DC-DC converter is connected with the first power supply unit through the third switch module; one end of the inductor module is connected with the output end of the DC-DC converter through the fourth switch module, and the other end is connected with the output module through the second switch module.

[0007] In an embodiment of the present application, optionally, the second power supply unit further comprises a first capacitor and a second capacitor; one end of the first capacitor is connected with the connecting circuit between the third switch module and the first power supply unit, and the other end is grounded; one end of the second capacitor is connected with the connecting circuit between the second switch module and the inductor module, and the other end is grounded.

[0008] In an embodiment of the present application, optionally, the first switch module, the second switch module, the third switch module and the fourth switch module are MOS switch elements.

[0009] The present application further provides a control method applied to a power control circuit, which comprises: disconnecting a power supply channel between the power supply module and the output module by the first switch module and the second switch module before the power control circuit is connected to an information processing system; the voltage change signal module obtains power consumption demand of the information processing system through the output module, and controls the power supply module, the first switch module and the second switch module by the first control signal, the second control signal and the third control signal according to the power consumption demand, so that the power control circuit outputs a power supply with corresponding power through the output module.

[0010] In an embodiment of the present application, optionally, the control of the power supply module, the first switch module and the second switch module by the first control signal, the second control signal and the third control signal according to the power consumption demand, so that the power control circuit outputs a power supply with corresponding power through the output module, comprises: obtaining a trigger signal generated by the information processing system according to the demand power supply; calling the second control signal to turn on a power supply channel between the first power supply unit and the output module according to the comparison result of the trigger signal and a reference value, and supplying power to the information processing system by the first power supply unit; and calling the third control signal to turn on a power supply channel between the second power supply unit and the output module, and supplying power to the information processing system by the second power supply unit after adjusting the output power of the second power supply unit by the first control signal.

[0011] In an embodiment of the present application, optionally, the control of the power supply module, the first switch module and the second switch module by the first control signal, the second control signal and the third control signal according to the power consumption demand, so that the power control circuit outputs a power supply with corresponding power through the output module, comprises: obtaining a trigger signal generated by the information processing system according to the demand power supply; calling the second control signal to turn on a power supply channel between the first power supply unit and the output module according to the comparison result of the trigger signal and a reference value, and supplying power to the information processing system by the first power supply unit; and calling the third control signal to turn on a power supply channel between the second power supply unit and the output module, and supplying power to the information processing system by the second power supply unit after adjusting the output power of the second power supply unit by the first control signal.

[0012] In an embodiment of the present application, optionally, the power supply channel between the second power supply unit and the output module is turned on by the third control signal according to the comparison result of the trigger signal and the reference value, and the second power supply unit supplies power to the information processing system after the output power of the second power supply unit is adjusted by the first control signal, which comprises: obtaining the supply target voltage of the information processing system according to the trigger signal, when the supply target voltage is lower than the reference value, the second power supply unit starts to provide the second power by the first control signal; the power supply channel between the first power supply unit and the output module is cut off by the first switch module after a second preset time period; and the output voltage of the power control circuit is adjusted according to the supply target voltage.

[0013] In an embodiment of the present application, optionally, the power supply power provided by the first power supply unit is higher than the power supply power provided by the second power supply unit.

[0014] The beneficial technical effects of the present application are that the power supply can be autonomously controlled when the power supply is connected to the system through the first switch module, and the system is protected by the first switch module; and the output voltage can be smoothly switched by the control method provided by the present application, so that voltage overshoot and output under-voltage are avoided.

[0015] In order to make the above and other objects, features and advantages of the present application more apparent, the following will describe a preferred embodiment in detail, and the accompanying drawings will be described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0017] Figure 1 The structural schematic diagram of the power control circuit provided by an embodiment of the present application;

[0018] Figure 2 The structural schematic diagram of the power supply module provided by an embodiment of the present application;

[0019] Figure 3 The structural schematic diagram of the second power supply unit provided by an embodiment of the present application;

[0020] Figure 4 The trigger control flowchart of the power control circuit provided by an embodiment of the present application;

[0021] Figure 5A power adjustment flowchart provided by an embodiment of the present application;

[0022] Figure 6 A high-voltage output control flowchart provided by an embodiment of the present application;

[0023] Figure 7 A high-voltage output control timing diagram provided by an embodiment of the present application;

[0024] Figure 8 A low-voltage output control flowchart provided by an embodiment of the present application;

[0025] Figure 9 A low-voltage output control timing diagram provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0027] Specific embodiments of the present application are disclosed with reference to the drawings, wherein the principles of the present application can be employed. It is to be understood that the embodiments are only exemplary of the application and do not appear to limit the scope of the application. The embodiments of the present application include many changes, modifications and equivalents within the spirit and scope of the claims.

[0028] Features described and / or illustrated with respect to one implementation can be used in the same or similar manner in one or more other implementations, in combination with other features in the other implementations, or in place of other features in the other implementations.

[0029] It should be emphasized that the term "comprises / comprising" when used in this text is taken to mean the presence of stated features, integers, steps or components, but not to the exclusion of one or more other features, integers, steps or components, or groups thereof.

[0030] Reference should be made to Figure 1As shown, the power control circuit provided by the present application comprises a power supply module 101, a voltage change signal module 102, an output module 103, a first switch module 104 and a second switch module 105; the power supply module 101 is configured to output power supply with different power through two output ends according to the output of the external power supply end and the received first control signal; the output module 103 is connected with the two output ends of the power supply module 101, configured to supply the power supply to the information processing system 106 connected with the output module 103; and transmit the trigger signal provided by the information processing system 106 to the voltage change signal module 102; the first switch module 104 and the second switch module 105 are respectively arranged between the two output ends of the power supply module 101 and the output module, the first switch module 104 is configured to disconnect and conduct the power supply channel between the one output end of the output module 103 and the power supply module 101 according to the received second control signal; the second switch module 105 is configured to disconnect and conduct the power supply channel between the other output end of the output module 103 and the power supply module 101 according to the received third control signal; the voltage change signal module 102 is connected with the first switch module 104, the second switch module 105, the power supply module 101 and the output module 103 respectively, configured to output the first control signal to the power supply module 101 according to the trigger signal; and output the second control signal and the third control signal to the first switch module 104 and the second switch module 105 respectively.

[0031] Therefore, in the actual application process, before the information processing system accesses the power control circuit, the first switch module and the second switch module are in the off state, at this time the power control circuit does not supply power to the signal processing system, only provides power for the voltage change signal module; when the voltage change signal module communicates with the information processing system through the input module to confirm the required power supply, the voltage change signal module realizes the output of the power control circuit with corresponding power supply by controlling the connected first switch module, second switch module and power supply unit. Therefore, by this structure, the power control circuit stops supplying power when accessing the information processing system, and after the communication is completed, the power supply with corresponding power can be provided according to the demand of the information processing system, which not only meets the requirements of USB PD protocol, but also can protect the information processing system from overvoltage and overcurrent, etc., avoiding the damage of the system caused by inputting high voltage when the information processing system requires low voltage.

[0032] Please refer to Figure 2As shown, in an embodiment of the present application, the power supply module 101 comprises a first power supply unit 201 and a second power supply unit 202; the first power supply unit 201 is connected with the output module 103 through a first switch module 104, and is used for providing a first power supply according to the output of an external power supply terminal; the second power supply unit 202 is connected with the second switch module 105, the voltage change signal module 102 and the first power supply unit 201 respectively, and is used for converting the first power supply and then providing a second power supply according to the first control signal.

[0033] Specifically, the first power supply unit and the second power supply unit can provide power supplies with different powers respectively to meet different requirements of the information processing system; the first power supply unit can convert the voltage input from outside into a voltage with a predetermined amplitude and then input into the information processing system through the first switch module, at this time, the maximum output power of the power control circuit can be provided; or the power supply, i.e. the first power supply, can be input into the second power supply unit to be converted again to generate a second power supply, and then the second power supply is input into the information processing system to meet different power requirements of different information processing systems; wherein the first switch module can be controlled by the voltage change signal module, and the voltage change signal module can determine whether to use the power supply provided by the first power supply unit or the second power supply unit according to the power requirement provided by the information processing system; for example, when the information processing system needs A voltage, the voltage change signal module determines that the first power supply unit supplies A voltage, i.e. the maximum power of the power control circuit, at this time, the first power supply unit is controlled to supply power to the information processing system through the first switch module; when the information processing system needs B voltage, the second power supply unit can supply B voltage at this time, B is smaller than A, the power supply path between the first power supply unit and the information processing system is cut off, and the second power supply unit is controlled to supply power to the information processing system; of course, the B voltage in this embodiment is an interval, the voltage value of which is determined based on the requirement of the information processing system and is adjusted by the first control signal output by the voltage change signal module, the specific adjustment process will be described in detail in subsequent embodiments, which will not be described here.

[0034] In the above embodiments, the information processing system can be a desktop computer, a portable computer, a smart phone, a tablet device or other smart electronic device, a network server, a network storage device, a switch, a router or other network communication device, or any other suitable device, and the size, shape, performance, function and price can be different. Further, the processor of the information processing system can include a processing resource for executing machine executable code, such as a CPU, a programmable logic array (PLA), an embedded device, such as a system on chip (SoC), or other control logic hardware. The information processing system can also include one or more computer readable media for storing machine executable code, such as software or data.

[0035] Reference is made to Figure 3 In an embodiment of the present application, the second power supply unit 202 includes a DC-DC controller 301, a third switch module 302, a fourth switch module 303 and an inductor module 304; the input end of the DC-DC controller 301 is connected to the first power supply unit 101 through the third switch module 302; one end of the inductor module 304 is connected to the output end of the DC-DC controller 301 through the fourth switch module 303, and the other end is connected to the output module 103 through the second switch module 105. Further, the second power supply unit also includes a first capacitor 305 and a second capacitor 306; one end of the first capacitor 305 is connected to the connection circuit between the third switch module 302 and the first power supply unit 101, and the other end is grounded; one end of the second capacitor 306 is connected to the connection circuit between the second switch module 105 and the inductor module 304, and the other end is grounded. Specifically, the first switch module, the second switch module, the third switch module and the fourth switch module can all be MOS switch elements; the first power supply unit can be a resonant power converter LLC; thus, a step-down conversion circuit is formed to achieve the purpose of voltage reduction output, and the specific functions of each element in the step-down conversion circuit can refer to the existing step-down conversion topology, which will not be described one by one here; the power supply converted by the DC-DC controller is not higher than the resonant power converter LLC.

[0036] Reference is made to Figure 4 The present application also provides a control method applied to the power control circuit, and the method includes:

[0037] S401 Before the power control circuit is connected to the information processing system, the power supply channel between the power supply module and the output module is disconnected through the first switch module and the second switch module;

[0038] The voltage change signal module S402 obtains the power demand of the information processing system through the output module, and controls the power supply module, the first switch module and the second switch module through the first control signal, the second control signal and the third control signal to make the power control circuit output the power supply of corresponding power through the output module according to the power demand.

[0039] Specifically, in actual work, the first switch module and the second switch module can be controlled to be in an off state before external alternating current accesses the power control circuit to communicate with the information processing system, at which time the power control circuit does not supply power to the information processing system; after the communication is completed, the first switch module and the second switch module are turned on according to actual needs, so that the power control circuit supplies power to the information processing system; thereby limiting the output of the second power supply unit through the second switch module to complete the overvoltage and overcurrent protection of the information processing system, and avoid damage.

[0040] In view of the fact that the power control circuit provides power supplies of different powers, for this purpose, please refer to Figure 5 In an embodiment of the present application, controlling the power supply module, the first switch module and the second switch module through the first control signal, the second control signal and the third control signal to make the power control circuit output the power supply of corresponding power through the output module according to the power demand can include:

[0041] S501 obtains a trigger signal generated by the information processing system according to the demand power supply;

[0042] S502 calls the second control signal to turn on the power supply channel between the first power supply unit and the output module according to the comparison result of the trigger signal and the reference value, supplies power to the information processing system through the first power supply unit, and calls the third control signal to turn on the power supply channel between the second power supply unit and the output module, and supplies power to the information processing system through the second power supply unit after adjusting the output power of the second power supply unit through the first control signal. The power supply power provided by the first power supply unit is higher than the power supply power provided by the second power supply unit.

[0043] When the information processing system needs high-power power supply, the control logic provided by the present application can refer to Figure 6 According to the trigger signal, the first control signal and the second control signal can be called to control the first power supply unit and the second power supply unit to provide the power supply of corresponding power for the information processing system, as shown in

[0044] S601 obtains the supply target voltage of the information processing system according to the trigger signal, and raises the output voltage of the power control circuit when the supply target voltage is equal to the reference value;

[0045] S602 When the output voltage reaches the supply target voltage, the first switch module is controlled to turn on the power supply channel between the first power supply unit and the output module by the second control signal;

[0046] S603 After a first preset time period, the second power supply unit is controlled to stop providing the second power supply by the first control signal.

[0047] In this embodiment, mainly for the information processing system needs high voltage, need to provide the maximum power supply, the control method of the power control circuit can refer to Figure 7 as shown:

[0048] VC1 is the first power supply provided by the first power supply unit, and VC2 is the power supply at the entrance of the output module; wherein, when the voltage change signal module knows that the information processing system needs high voltage, the output of the power control circuit is raised by feedback control at t1, until t2 reaches the required voltage, at this time, the second control signal VG1 is low, the MOS switch element of the first switch module is turned on, so that the LLC output is connected to the system, and at t3 after the first preset time period, the first control signal VG2 is low, the DC-DC controller is controlled to stop providing the second power supply. The first preset time period can be selected according to actual needs, which is not limited herein.

[0049] For the information processing system needs high power supply, the control logic provided by the present application can refer to Figure 8 as shown, in an embodiment of the present application, according to the comparison result of the trigger signal and the reference value, the third control signal is called to turn on the power supply channel between the second power supply unit and the output module, and the output power of the second power supply unit is adjusted by the first control signal, and then the information processing system is supplied by the second power supply unit can include:

[0050] S801 According to the trigger signal, the supply target voltage of the information processing system is obtained, and when the supply target voltage is lower than the reference value, the second power supply unit is controlled to start providing the second power supply by the first control signal;

[0051] S802 After a second preset time period, the first switch module is controlled to cut off the power supply channel between the first power supply unit and the output module by the second control signal;

[0052] S803 According to the supply target voltage, the output voltage of the power control circuit is adjusted.

[0053] In this embodiment, mainly for information processing system needs low voltage, need to adjust the power supply power, the control method of the power control circuit can refer to Figure 9 As shown in the above

[0054] VC1 is the power supply of the first power provided by the first power supply unit, and VC2 is the power supply at the entrance of the output module; wherein, at time t1, low voltage needs to be output, therefore, VG2 is set high (the DC-DC controller is turned on to provide the power supply of the second power), at time t2 in the second preset time period, VG1 is set high (the power supply of LLC to the information processing system is cut off), at this time, the power control circuit can keep the output voltage, and thus, through feedback, the output of the power control circuit can be adjusted to the supply target voltage required by the information processing system. Thus, through the above Figures 6 to 9 The embodiment and control timing shown can ensure smooth switching of the output voltage, without large voltage overshoot and output undervoltage.

[0055] The beneficial technical effects of the present application are that the power supply can be automatically controlled when connected to the system through the first switch module, and the system is protected through the first switch module; furthermore, the control method provided by the present application can also ensure smooth switching of the output voltage, avoiding voltage overshoot and output undervoltage.

[0056] It should be noted that, in the specification, relational terms such as first and second, and the like, can be used solely to distinguish one from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or "includes" does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. The terms "upper", "lower", and the like, indicate the orientation or position of the described aspects in the drawings as shown, and are used for convenience only to facilitate the description of the application and its disclosure, and do not connote or imply any specific orientation, construction, or arrangement of the described aspects, unless otherwise indicated or implied by context. Unless otherwise defined, the terms "mount", "connected", "connecting", and "linking" are to be construed broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection via an intermediate medium; it can be a communication between the internal elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the specification. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0058] The principles and implementation manners of the present application are described in the specific embodiments in the present application, and the above embodiment descriptions are only used to help understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above is not understood as the limitation of the present application.

Claims

1. A power control circuit, characterized by, The circuit comprises a power supply module, a voltage change signal module, an output module, a first switch module and a second switch module; The power supply module is configured to output power of different powers through two output ends according to the output of an external power supply end and a received first control signal; The output module is connected to the two output ends of the power supply module and is configured to supply the power to an information processing system connected to the output module and transmit a trigger signal generated by the information processing system according to power consumption demand to the voltage change signal module; The first switch module and the second switch module are respectively arranged between the two output ends of the power supply module and the output module; The first switch module is configured to disconnect and conduct a power supply channel between the output module and the power supply module according to a received second control signal; The second switch module is configured to disconnect and conduct a power supply channel between the other output end of the output module and the power supply module according to a received third control signal; The voltage change signal module is connected to the first switch module, the second switch module, the power supply module and the output module and is configured to output the first control signal to the power supply module and output the second control signal and the third control signal to the first switch module and the second switch module respectively according to a comparison result of the trigger signal and a reference value; Before the information processing system accesses the power control circuit, the first switch module and the second switch module are in an off state.

2. The power control circuit of claim 1, wherein, The power supply module comprises a first power supply unit and a second power supply unit; The first power supply unit is connected to the output module through the first switch module and is configured to provide power of a first power according to the output of an external power supply end; The second power supply unit is connected to the second switch module, the voltage change signal module and the first power supply unit and is configured to convert the power of the first power and provide power of a second power according to the first control signal.

3. The power control circuit of claim 2, wherein The second power supply unit comprises a DC-DC controller, a third switch module, a fourth switch module and an inductor module; The input end of the DC-DC controller is connected to the first power supply unit through the third switch module; One end of the inductor module is connected to the output end of the DC-DC controller through the fourth switch module, and the other end is connected to the output module through the second switch module.

4. The power control circuit of claim 3, wherein, The second power supply unit further comprises a first capacitor and a second capacitor; One end of the first capacitor is connected to a connection circuit between the third switch module and the first power supply unit, and the other end is grounded; One end of the second capacitor is connected to a connection circuit between the second switch module and the inductor module, and the other end is grounded.

5. The power control circuit of claim 3, wherein, The first switch module, the second switch module, the third switch module and the fourth switch module are MOS switch elements.

6. A control method applied to the power control circuit according to any one of claims 2 to 5, characterized in that, The method comprises: disconnecting the power supply channel between the power supply module and the output module through the first switch module and the second switch module before the power control circuit accesses the information processing system; The voltage change signal module obtains the power demand of the information processing system through the output module, and controls the power supply module, the first switch module and the second switch module through the first control signal, the second control signal and the third control signal according to the power demand, so that the power control circuit outputs the power supply with corresponding power through the output module.

7. The control method according to claim 6, characterized by The voltage change signal module obtains the power demand of the information processing system through the output module, and controls the power supply module, the first switch module and the second switch module through the first control signal, the second control signal and the third control signal according to the power demand, so that the power control circuit outputs the power supply with corresponding power through the output module. The information processing system obtains the trigger signal generated by the power supply according to the demand; According to the comparison result of the trigger signal and the reference value, the second control signal is called to turn on the power supply channel between the first power supply unit and the output module, and the information processing system is powered by the first power supply unit; And the third control signal is called to turn on the power supply channel between the second power supply unit and the output module, and the information processing system is powered by the second power supply unit after the output power of the second power supply unit is adjusted by the first control signal.

8. The control method according to claim 7, characterized by, According to the comparison result of the trigger signal and the reference value, the second control signal is called to turn on the power supply channel between the first power supply unit and the output module, and the information processing system is powered by the first power supply unit; According to the comparison result of the trigger signal and the reference value, the second control signal is called to turn on the power supply channel between the first power supply unit and the output module, and the information processing system is powered by the first power supply unit; When the output voltage reaches the supply target voltage, the first switch module is controlled to turn on the power supply channel between the first power supply unit and the output module through the second control signal; After the first preset time period, the second power supply unit is controlled to stop providing the second power supply through the first control signal.

9. The control method according to claim 7, characterized by, According to the comparison result of the trigger signal and the reference value, the second control signal is called to turn on the power supply channel between the first power supply unit and the output module, and the information processing system is powered by the first power supply unit; According to the comparison result of the trigger signal and the reference value, the second control signal is called to turn on the power supply channel between the first power supply unit and the output module, and the information processing system is powered by the first power supply unit; After the second preset time period, the first switch module is controlled to cut off the power supply channel between the first power supply unit and the output module through the second control signal; According to the supply target voltage, the output voltage of the power control circuit is adjusted.

10. The control method according to any one of claims 6 to 9, characterized by, The power supply power provided by the first power supply unit is higher than the power supply power provided by the second power supply unit.

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