A power supply control method, power supply method, control system and power supply system

Abstract

The application relates to the technical field of server power supply, and discloses a power supply control method, a power supply method, a control system and a power supply system. The control method is applied to a mainboard connected with a PSU and comprises the following steps: a first start-up signal is detected; when the first start-up signal is detected to be triggered, a voltage feedback signal corresponding to the current mainboard type is generated, and the voltage feedback signal is used for transmission to the PSU; wherein the voltage feedback signal is used as a judgment basis for whether the PSU starts up. The power supply method is applied to the PSU connected with the mainboard and comprises the following steps: a second start-up signal is detected; when the second start-up signal is detected to be triggered, the voltage feedback signal from the mainboard is received; whether the PSU start-up operation is executed is judged based on the voltage feedback signal; and the voltage feedback signal is used as the judgment basis for whether the PSU starts up, so that the purpose of foolproof insertion of the mainboard and the PSU is achieved, the machine burning accident caused by the mismatched PSU and the mainboard is avoided, and the safety of power supply is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of server power supply, and in particular to a power supply control method, a power supply method, a control system and a power supply system. BACKGROUND

[0002] In the beginning, the output voltage of a PSU (Power Supply Unit) is designed as 12V. With the application of centralized power supply and the increase of power supply power, the current of the PSU also needs to be increased, and the temperature rise of the connector and the line voltage drop are all the limitations. In order to overcome the use limitations, the PSU with an output voltage of 54V is born.

[0003] In the normal use state, the 12V motherboard is used with the 12V PSU, and the 54V motherboard is used with the 54V PSU. However, if the 54V PSU is connected to the 12V motherboard, the devices on the motherboard will be damaged due to overvoltage, which may cause serious consequences. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a power supply control method, a power supply method, a control system and a power supply system, which solve the problem that when the PSU and the motherboard are not used in correspondence, the devices on the motherboard will be damaged due to overvoltage, which may cause serious consequences.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A power supply control method applied to a motherboard connected with a PSU, comprising:

[0007] detecting a first start-up signal;

[0008] generating a voltage feedback signal corresponding to the current motherboard type when the first start-up signal is detected, the voltage feedback signal being used for transmission to the PSU;

[0009] wherein the voltage feedback signal is used as a judgment basis for whether the PSU starts up.

[0010] Optionally, the generation of the voltage feedback signal corresponding to the current motherboard type comprises:

[0011] adjusting the voltage feedback value of a motherboard feedback pin, so that the voltage feedback value is within a voltage feedback range corresponding to the current motherboard type;

[0012] generating a voltage feedback signal representing the voltage feedback value;

[0013] wherein the motherboard feedback pin is a power supply pin in the motherboard.

[0014] Optionally, an adjustable resistor is connected to the mainboard feedback pin.

[0015] The method for adjusting the voltage feedback value of the mainboard feedback pin comprises:

[0016] The resistance value of the adjustable resistor is changed, so that the voltage feedback value of the mainboard feedback pin is changed.

[0017] To achieve the above object, the application further provides the following technical solutions.

[0018] A power supply method applied to a PSU connected to a mainboard, comprising:

[0019] detecting a second start signal;

[0020] When the second start signal is detected, a voltage feedback signal from the mainboard is received;

[0021] Based on the voltage feedback signal, it is determined whether to execute a PSU start operation.

[0022] Optionally, based on the voltage feedback signal, it is determined whether to execute a PSU start operation, comprising:

[0023] Based on the voltage feedback signal, a voltage feedback value of a mainboard feedback pin is obtained;

[0024] It is determined whether the voltage feedback value is within a voltage standard range corresponding to a current PSU type; if yes, the PSU starts; if no, the PSU does not start.

[0025] The mainboard feedback pin is a power supply pin in the mainboard.

[0026] To achieve the above object, the application further provides the following technical solutions.

[0027] A power supply control system applied to a mainboard connected to a PSU, comprising:

[0028] A first detection unit for detecting a first start signal;

[0029] A signal control unit connected to the first detection unit, for generating a voltage feedback signal corresponding to a current mainboard type when the first detection unit detects a first start signal trigger, the voltage feedback signal being used for transmission to the PSU.

[0030] The voltage feedback signal is used as a basis for determining whether the PSU starts.

[0031] Optionally, the signal control unit is used for:

[0032] Adjust the voltage feedback value of the motherboard feedback pin so that the voltage feedback value is within the voltage feedback range corresponding to the current motherboard type;

[0033] A voltage feedback signal characterizing the voltage feedback value is generated.

[0034] Optionally, the signal control unit includes a CPLD, the CPLD includes a MOS transistor, the source of the MOS transistor is connected to the enable terminal of the PSU, the gate of the MOS transistor is connected to the enable terminal of the CPLD, the drain of the MOS transistor is connected to an adjustable resistor, and the other end of the adjustable resistor away from the MOS transistor is connected to the enable terminal of the PSU.

[0035] When the resistance value of the adjustable resistor changes, the voltage feedback value of the motherboard feedback pin changes.

[0036] To achieve the above objectives, the present invention also provides the following technical solutions:

[0037] A power supply system for a power supply unit (PSU) connected to a motherboard, comprising:

[0038] The second detection unit is used to detect the second power-on signal;

[0039] A receiving unit, connected to the second detection unit, is used to receive a voltage feedback signal from the motherboard when the second detection unit detects that the second power-on signal has been triggered.

[0040] The determination and execution unit is used to determine whether to perform the PSU power-on operation based on the voltage feedback signal.

[0041] Optionally, the determination execution unit is used for:

[0042] Based on the voltage feedback signal, the voltage feedback value of the motherboard feedback pin is obtained;

[0043] Determine whether the voltage feedback value is within the voltage standard range corresponding to the current PSU type;

[0044] If so, the PSU is powered on;

[0045] If not, the PSU will not power on.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] This invention provides a power supply control method, power supply method, control system, and power supply system. When a power-on signal is detected, a voltage feedback signal is used as the basis for determining whether the PSU is powered on, so as to achieve the purpose of preventing the motherboard and PSU from being mistakenly inserted. This can avoid the burn-out accident caused by the mismatch between the PSU and the motherboard, thereby improving the safety of the motherboard. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A flowchart of a power supply control method provided in an embodiment of the present invention;

[0050] Figure 2 A flowchart of step S12 in a power supply control method provided in an embodiment of the present invention;

[0051] Figure 3 A flowchart illustrating a power supply method provided in an embodiment of the present invention;

[0052] Figure 4 A flowchart of step S23 in a power supply method provided in an embodiment of the present invention;

[0053] Figure 5 A structural block diagram of a power supply control system provided in an embodiment of the present invention;

[0054] Figure 6 A schematic diagram of the circuit principle of the motherboard in a power supply control system provided in an embodiment of the present invention;

[0055] Figure 7 This is a structural block diagram of a power supply system provided in an embodiment of the present invention.

[0056] In the above diagram: 10, mainboard; 11, first detection unit; 12, signal control unit; 20, PSU; 21, second detection unit; 22, receiving unit; 23, judgment and execution unit. Detailed Implementation

[0057] In order to make the objectives, characteristics and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the embodiments described below are only a 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 other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0058] It should be understood that, in the description of the present application, the specific embodiments are only used to explain the present application, rather than limit the present application. Among them, the exemplary embodiments are described as processes or methods depicted by flowcharts; although the flowcharts describe the operations or steps of the processes in a certain order, many of the operations or steps can be implemented in parallel, concurrently or simultaneously, and the order of the operations can be rearranged. The corresponding process can be terminated when the operations or steps are completed, and can also have additional steps not included in the drawings. The foregoing processes can correspond to methods, functions, procedures, subroutines, subprograms, etc., and the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0059] The term "comprising" and its variants used in the present application are open and inclusive, i.e. "including but not limited to". The term "based on" is "at least partially based on". The technical solutions of the present application will be further illustrated below in conjunction with the drawings and through specific embodiments; it can be understood that, for the convenience of description, only the parts related to the present application are shown in the drawings, rather than all the structures.

[0060] The server power supply is a power supply used for servers. At present, the server power supply is mostly a standardized module, such as the Intel CRPS (Intel defined power supply design specification) series, which defines the size and output pin definition of the server power supply standard, facilitating the universal design and mass production of the server power supply.

[0061] In the beginning, the output voltage of the PSU is designed as 12V. With the increase of GPU, the application of centralized power supply and the increase of power supply power, the current of the PSU also needs to be increased, and the temperature rise of the connector and the line voltage drop brought thereby become the limitation. In order to overcome the use limitation, the PSU with an output voltage of 54V or 48V emerges as the times require. However, at present, the 12V PSU and the 54V or 48V PSU have no difference in appearance and pin, and it is easy to connect the wrong PSU to the motherboard, for example, if the 54V or 48V PSU is connected to the 12V motherboard, the devices on the motherboard will be damaged due to overvoltage, which is easy to cause serious consequences.

[0062] To solve the above problems in the prior art, the present application provides the technical solutions as follows, which are described in detail below in combination with the drawings.

[0063] Please refer to Figure 1 A flow chart of a power supply control method is provided for the embodiment of the present application, and the power supply control method is applied to a mainboard connected with a PSU.

[0064] Specifically, the control method comprises:

[0065] S11, detecting a first boot signal.

[0066] The first boot signal can be triggered by a user, for example, by pressing a boot key on the mainboard.

[0067] S12, when the first boot signal is detected, generating a voltage feedback signal corresponding to the current mainboard type.

[0068] Specifically, the voltage feedback signal is transmitted to the PSU.

[0069] Please refer to Figure 2 A flow chart of step S12 in the power supply control method is provided for the embodiment of the present application. Specifically, in step S12, the voltage feedback signal corresponding to the current mainboard type is generated, which comprises:

[0070] S121, adjusting the voltage feedback value of the mainboard feedback pin to be within the voltage feedback range corresponding to the current mainboard type.

[0071] In this embodiment, the CPLD in the mainboard 10 comprises a MOS tube; the CPLD is connected with the mainboard feedback pin, and an adjustable resistor is connected to the mainboard feedback pin; when it is necessary to adjust the voltage feedback value of the mainboard feedback pin, the CPLD changes the voltage feedback value of the mainboard feedback pin by turning on / off the MOS tube and changing the resistance value of the adjustable resistor.

[0072] Specifically, the mainboard feedback pin is a power pin (PS_ON pin) in the mainboard.

[0073] For example, when the current mainboard is 12V, the CPLD adjusts the voltage feedback value of the mainboard feedback pin to be within a value range below 1V; when the current mainboard is 54V or 48V, the voltage feedback value of the mainboard feedback pin is adjusted to be within a value range of 1.4-1.6V.

[0074] S122, generating a voltage feedback signal representing the voltage feedback value.

[0075] In this step, the voltage feedback signal can be generated due to the change of the voltage on the mainboard feedback pin.

[0076] Specifically, by changing the resistance value of the adjustable resistor, the voltage feedback value of the mainboard feedback pin is changed, and then the level value fed back to the PSU by the mainboard is changed, which is the voltage feedback signal in this step.

[0077] The voltage feedback signal can be used to represent the voltage feedback value within a certain interval, and the voltage feedback signal is used as a basis for judging whether the PSU is powered on. Using the voltage feedback signal, the PSU can reflect the type of currently connected mainboard, for example, if the currently connected mainboard is a 12V mainboard, the generated voltage feedback signal is used to represent the voltage feedback value corresponding to the 12V mainboard, and if the currently connected mainboard is a 54V or 48V mainboard, the generated voltage feedback signal is used to represent the voltage feedback value corresponding to the 54V or 48V mainboard.

[0078] For example, when the current mainboard is 12V, the voltage feedback signal generated represents a voltage feedback value in the range of 1V or less; when the current mainboard is 54V or 48V, the voltage feedback signal generated represents a voltage feedback value in the range of 1.4-1.6V.

[0079] By optimizing the control circuit, the voltage feedback value is controlled in segments, and the voltage feedback value of the mainboard feedback pin is adjusted adaptively according to different types of mainboards, so that the PSU can use the voltage feedback signal representing the voltage feedback value as a basis for judging whether to power on.

[0080] Based on the foregoing embodiments, please refer to Figure 3 A flowchart of a power supply method provided by an embodiment of the application. The power supply method provided by the embodiment is applied to a PSU connected to a mainboard, and includes:

[0081] S21, detecting a second power-on signal.

[0082] It can be understood that the second power-on signal can be triggered by a user, for example, by pressing a power-on key on the PSU or the mainboard.

[0083] S22, when the second power-on signal is detected, receiving a voltage feedback signal from the mainboard.

[0084] The mainboard feedback pin connected to the PSU is connected to an adjustable resistor; in addition, the mainboard 10 is provided with a CPLD, and the CPLD includes a MOS tube; the CPLD is connected to the mainboard feedback pin; when it is necessary to adjust the voltage feedback value of the mainboard feedback pin, the voltage feedback value of the mainboard feedback pin is changed by turning on and off the MOS tube and changing the resistance value of the adjustable resistor. Specifically, the mainboard feedback pin is a power supply pin (PS_ON pin) in the mainboard.

[0085] For example, when the current mainboard is 12V, the voltage feedback value of the mainboard feedback pin is adjusted to a value range below 1V; when the current mainboard is 54V or 48V, the voltage feedback value of the mainboard feedback pin is adjusted to a value range of 1.4-1.6V.

[0086] The voltage feedback signal is generated due to the change of the voltage of the mainboard feedback pin. Specifically, the voltage feedback value of the mainboard feedback pin is changed by changing the resistance value of the adjustable resistor, and then the level value fed back by the mainboard to the PSU is changed, which is the voltage feedback signal in this step.

[0087] In this embodiment, the PSU is connected with the mainboard through the ADC interface, and the voltage feedback value of the mainboard feedback pin obtained is a specific value, so that the segmented feedback of the voltage feedback value in different value ranges is realized.

[0088] S23, judging whether to perform the operation of starting the PSU based on the voltage feedback signal.

[0089] Please refer to Figure 4 The flow chart of step S23 in the power supply method provided by the embodiment of the application is shown in the figure. Specifically, step S23 includes:

[0090] S231, obtaining the voltage feedback value of the mainboard feedback pin based on the voltage feedback signal.

[0091] The mainboard feedback pin is a power pin in the mainboard. In this step, the current voltage value of the mainboard feedback pin can be detected through the ADC interface to obtain the voltage feedback value.

[0092] The voltage feedback signal can be used to represent the voltage feedback value in a certain interval, and the voltage feedback signal is used as the basis for judging whether the PSU is started. By using the voltage feedback signal, the type of the currently connected mainboard can be reflected to the PSU.

[0093] For example, when the currently connected mainboard is a 12V mainboard, the generated voltage feedback signal is used to represent the voltage feedback value corresponding to the 12V mainboard, and when the currently connected mainboard is a 54V or 48V mainboard, the generated voltage feedback signal is used to represent the voltage feedback value corresponding to the 54V or 48V mainboard. Based on this, the PSU can obtain the corresponding voltage feedback value according to the currently obtained voltage feedback value.

[0094] S232, judging whether the voltage feedback value is in the voltage standard range corresponding to the current PSU type; if yes, starting the PSU; if no, not starting the PSU.

[0095] Specifically, the corresponding voltage standard range is determined according to the PSU type in advance, and the voltage standard range matches the voltage feedback value of the mainboard of the same type.

[0096] For example, when the current PSU is 12V, the corresponding voltage standard range matches the voltage feedback value of the 12V mainboard, and specifically can be a numerical range of 1V or less; when the current PSU is 54V or 48V, the corresponding voltage standard range matches the voltage feedback value of the 54V or 48V mainboard, and specifically can be a numerical range of 1.4-1.6V.

[0097] Only when the mainboard represented by the voltage feedback value obtained by the current PSU is consistent with the type of the PSU, the PSU is powered on, otherwise, the PSU is not powered on, thereby effectively preventing the problem of burning the machine caused by errors.

[0098] Based on the above various embodiments, please refer to Figure 5 A structural block diagram of a power supply control system provided by the embodiment of the application, comprising a mainboard 10 connected with the output end of a PSU;

[0099] The mainboard 10 comprises:

[0100] The first detection unit 11 is used for detecting the first power-on signal.

[0101] The signal control unit 12 is connected with the first detection unit 11, and is used for generating a voltage feedback signal corresponding to the type of the current mainboard 10 when the first detection unit 11 detects the first power-on signal trigger, and the voltage feedback signal is used for transmission to the PSU; wherein the voltage feedback signal is used as the basis for judging whether the PSU is powered on.

[0102] Optionally, the signal control unit 12 is specifically used for adjusting the voltage feedback value of the mainboard feedback pin, so that the voltage feedback value is within the voltage feedback range corresponding to the type of the current mainboard 10, and thereby generating a voltage feedback signal representing the voltage feedback value.

[0103] Please refer to Figure 6 A circuit principle schematic diagram of the mainboard 10 in the power supply control system provided by the embodiment of the application.

[0104] In the embodiment, the signal control unit 12 comprises a CPLD, the CPLD comprises a MOS tube Q1, the source of the MOS tube Q1 is connected with the enable end PSU_EN of the PSU, the gate of the MOS tube Q1 is connected with the enable end CPLD_EN of the CPLD, and the drain of the MOS tube Q1 is connected with an adjustable resistor R1, and the other end of the adjustable resistor R1 away from the MOS tube Q1 is connected with the enable end PSU_EN of the PSU.

[0105] When the resistance value of the adjustable resistor R1 changes, the MOS tube Q1 pulls down the level inside the mainboard 10, so that the voltage feedback value of the mainboard feedback pin changes.

[0106] As an example, when the current mainboard 10 is 12V, the resistance value of the adjustable resistor R1 is adjusted to 0Ω, so that the voltage feedback value of the mainboard feedback pin is adjusted to a value range below 1V; when the current mainboard 10 is 54V or 48V, the resistance value of the adjustable resistor R1 is adjusted to 7.3-9.4KΩ, and the voltage feedback value of the mainboard feedback pin is adjusted to a value range of 1.4-1.6V.

[0107] Based on the foregoing embodiments, please refer to Figure 7 A structural block diagram of a power supply system of a power supply provided by the embodiment of the present application. In the embodiment, the power supply system of the power supply includes a PSU 20, and the PSU 20 is connected with the input end of the mainboard 10.

[0108] Specifically, the PSU 20 includes:

[0109] A second detection unit 21 for detecting a second start-up signal; it can be understood that the second start-up signal can be triggered by a user, for example, by pressing a start-up key on the PSU 20 or the mainboard 10;

[0110] A receiving unit 22 connected with the second detection unit 21, for receiving a voltage feedback signal from the mainboard 10 when the second detection unit 21 detects the second start-up signal trigger;

[0111] A judgment execution unit 23 for judging whether to execute the operation of starting up the PSU based on the voltage feedback signal.

[0112] Further, the judgment execution unit 23 is used for obtaining the voltage feedback value of the mainboard feedback pin based on the voltage feedback signal, and judging whether the voltage feedback value is within the voltage standard range corresponding to the current type of the PSU 20; if yes, the PSU 20 starts up; if no, the PSU 20 does not start up.

[0113] In the embodiment, the PSU 20 is connected with the mainboard 10 through an ADC, so that the voltage feedback value can be obtained by detecting the current voltage value of the mainboard feedback pin, and used as the basis for whether to start up.

[0114] The mainboard feedback pin is a power supply pin in the mainboard 10.

[0115] Since the voltage on the mainboard feedback pin changes, the voltage feedback signal can be generated. Specifically, by changing the resistance value of the adjustable resistor, the voltage feedback value of the mainboard feedback pin changes, and further, the level value fed back by the mainboard 10 to the PSU 20 changes, which is the voltage feedback signal in this step.

[0116] Based on this, the voltage feedback signal can be used to represent the voltage feedback value within a certain interval, and the voltage feedback signal is used as the basis for judging whether the PSU 20 is powered on. Using the voltage feedback signal, the current access motherboard type can be reflected to the PSU 20.

[0117] For example, when the current access motherboard 10 is a 12V motherboard, the generated voltage feedback signal is used to represent the voltage feedback value corresponding to the 12V motherboard 10, and when the current motherboard 10 is a 54V or 48V motherboard, the generated voltage feedback signal is used to represent the voltage feedback value corresponding to the 54V or 48V motherboard 10. Based on this, the PSU 20 can obtain the corresponding voltage feedback value according to the current obtained voltage feedback value.

[0118] Specifically, the corresponding voltage standard range is determined in advance according to the type of the PSU 20, and the voltage standard range matches the voltage feedback value of the same type of motherboard.

[0119] For example, when the current PSU 20 is 12V, the corresponding voltage standard range matches the voltage feedback value of the 12V motherboard, which can be a numerical range of 1V or less; when the current PSU 20 is 54V or 48V, the corresponding voltage standard range matches the voltage feedback value of the 54V or 48V motherboard, which can be a numerical range of 1.4-1.6V.

[0120] As an example, please refer to Table 1 below, for different PSU power types, the detected voltage feedback value and the corresponding PSU power-on condition.

[0121]

[0122] Table 1

[0123] As can be seen, only when the voltage feedback value obtained by the current PSU 20 represents the type of the motherboard 10 and the PSU 20, the PSU 20 is powered on, otherwise, the PSU 20 is not powered on, thereby effectively preventing the problem of burning caused by errors.

[0124] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions described in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A control method of a power supply, characterized by, The control method is applied to a mainboard connected with a PSU, and the control method comprises: detecting a first start-up signal; generating a voltage feedback signal corresponding to a current mainboard type when the first start-up signal is detected to be triggered, the voltage feedback signal being used for transmission to the PSU; wherein the voltage feedback signal is used as a basis for judging whether the PSU starts up or not; the generation of the voltage feedback signal corresponding to the current mainboard type comprises: adjusting a voltage feedback value of a mainboard feedback pin, so that the voltage feedback value is within a voltage feedback range corresponding to the current mainboard type; generating a voltage feedback signal representing the voltage feedback value; wherein the mainboard feedback pin is a power pin in the mainboard; the mainboard feedback pin is connected with an adjustable resistor; the adjustment of the voltage feedback value of the mainboard feedback pin comprises: changing a resistance value of the adjustable resistor, so that the voltage feedback value of the mainboard feedback pin changes.

2. A power supply method of a power supply, characterized by, The power supply method is applied to a PSU connected with a mainboard, and the power supply method comprises: detecting a second start-up signal; receiving a voltage feedback signal from the mainboard when the second start-up signal is detected to be triggered; judging whether to execute a PSU start-up operation based on the voltage feedback signal; the judgment of whether to execute the PSU start-up operation based on the voltage feedback signal comprises: obtaining a voltage feedback value of a mainboard feedback pin based on the voltage feedback signal; judging whether the voltage feedback value is within a voltage standard range corresponding to a current PSU type; if yes, the PSU starts up; if no, the PSU does not start up; wherein the mainboard feedback pin is a power pin in the mainboard; wherein the mainboard feedback pin connected with the PSU is connected with an adjustable resistor; when it is necessary to adjust the voltage feedback value of the mainboard feedback pin, the voltage feedback value of the mainboard feedback pin changes by changing a resistance value of the adjustable resistor.

3. A control system for a power supply, characterized by The control method is applied to a mainboard connected with a PSU, and the control method comprises: detecting a first start-up signal; generating a voltage feedback signal corresponding to a current mainboard type when the first start-up signal is detected to be triggered, the voltage feedback signal being used for transmission to the PSU; wherein the voltage feedback signal is used as a basis for judging whether the PSU starts up or not; the generation of the voltage feedback signal corresponding to the current mainboard type comprises: adjusting a voltage feedback value of a mainboard feedback pin, so that the voltage feedback value is within a voltage feedback range corresponding to the current mainboard type; generating a voltage feedback signal representing the voltage feedback value; wherein the mainboard feedback pin is a power pin in the mainboard; the mainboard feedback pin is connected with an adjustable resistor; 4. A power supply system of a power supply, characterized by, the adjustment of the voltage feedback value of the mainboard feedback pin comprises: changing a resistance value of the adjustable resistor, so that the voltage feedback value of the mainboard feedback pin changes. The power supply method is applied to a PSU connected with a mainboard, and the power supply method comprises: detecting a second start-up signal; receiving a voltage feedback signal from the mainboard when the second start-up signal is detected to be triggered; judging whether to execute a PSU start-up operation based on the voltage feedback signal; the judgment of whether to execute the PSU start-up operation based on the voltage feedback signal comprises: obtaining a voltage feedback value of a mainboard feedback pin based on the voltage feedback signal; judging whether the voltage feedback value is within a voltage standard range corresponding to a current PSU type; if yes, the PSU starts up; if no, the PSU does not start up; wherein the mainboard feedback pin is a power pin in the mainboard; wherein the mainboard feedback pin connected with the PSU is connected with an adjustable resistor; when it is necessary to adjust the voltage feedback value of the mainboard feedback pin, the voltage feedback value of the mainboard feedback pin changes by changing a resistance value of the adjustable resistor. The control method is applied to a mainboard connected with a PSU, and the control method comprises: a first detection unit for detecting a first start-up signal; a signal control unit connected with the first detection unit, for generating a voltage feedback signal corresponding to a current mainboard type when the first detection unit detects a first start-up signal to be triggered, the voltage feedback signal being used for transmission to the PSU; wherein the voltage feedback signal is used as a basis for judging whether the PSU starts up or not; the signal control unit is used for: adjusting a voltage feedback value of a mainboard feedback pin, so that the voltage feedback value is within a voltage feedback range corresponding to the current mainboard type; generating a voltage feedback signal representing the voltage feedback value; the signal control unit comprises a CPLD, the CPLD comprises a MOS tube, a source of the MOS tube is connected with an enable end of a PSU, a gate of the MOS tube is connected with an enable end of the CPLD, a drain of the MOS tube is connected with an adjustable resistor, the adjustable resistor is away from the other end of the MOS tube and is connected with the enable end of the PSU; when the resistance value of the adjustable resistor changes, the voltage feedback value of the mainboard feedback pin changes. The power supply method is applied to a PSU connected with a mainboard, and the power supply method comprises: a second detection unit for detecting a second start-up signal; A receiving unit, connected with the second detecting unit, is configured to receive a voltage feedback signal from the mainboard when the second detecting unit detects a second power-on signal trigger; A judging and executing unit is configured to judge whether to execute a PSU power-on operation based on the voltage feedback signal; The judging and executing unit is configured to: acquire a voltage feedback value of a mainboard feedback pin based on the voltage feedback signal; judge whether the voltage feedback value is within a voltage standard range corresponding to a current PSU type; if yes, the PSU is powered on; if no, the PSU is not powered on; The mainboard feedback pin connected with the PSU is connected with an adjustable resistor; When it is necessary to adjust the voltage feedback value of the mainboard feedback pin, the voltage feedback value of the mainboard feedback pin is changed by changing the resistance value of the adjustable resistor.

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