Fan power supply circuit and server

Abstract

The embodiment of the invention provides a fan power supply circuit and a server, the fan power supply circuit can be applied to the server comprising a target component and a target fan, the target fan can cool the target component, and the fan power supply circuit comprises a first power supply unit used for outputting a first voltage when the server is in an S0 state. The second power supply unit is used for outputting a second voltage when the server is in the S5 state; the main power supply unit is used for conducting a path between the first power supply unit and the power supply input end of the target fan when the server is in the S0 state, and the auxiliary power supply unit is used for conducting a path between the second power supply unit and the power supply input end of the target fan when the server is in the S5 state. Through the fan power supply circuit, the server can enable the target fan to operate in the S5 state, so that normal heat dissipation is carried out on the target part, and the problem of hardware faults or server performance reduction is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of computer equipment, and in particular to a fan power supply circuit and a server. Background Art

[0002] With the development of information technology, servers are increasingly used in all walks of life. Servers have two operating states: S0 and S5. In S0, all components in the server system are in working order; in S5, only basic functional components of the server are in working order. Currently, more and more components are required to work in S5.

[0003] For servers in S5 state, the fans will not work. However, as more and more components are required to work in S5 state, the working state of the original fans cannot meet the normal heat dissipation of the servers in S5 state, which may cause hardware failure or server performance degradation. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present application example provides a fan power supply circuit and a server.

[0005] In a first aspect, an embodiment of the present invention provides a fan power supply circuit, which is applied to a server; the server comprises: a target component and a target fan, wherein the target fan is used to dissipate heat for the target component; the fan power supply circuit comprises: a first power supply unit, a second power supply unit, a main power supply unit and a secondary power supply unit;

[0006] The first power supply unit is configured to output a first voltage when the server is in a first state;

[0007] The second power supply unit is configured to output a second voltage when the server is in a second state, wherein a current corresponding to the first voltage is greater than a current corresponding to the second voltage;

[0008] The main power supply unit is used to connect the path between the first power supply unit and the power input terminal of the target fan when the server is in the first state, and disconnect the path between the first power supply unit and the power input terminal of the target fan when the server is in the second state;

[0009] The auxiliary power supply unit is used to disconnect the path between the second power supply unit and the power input terminal of the target fan when the server is in the first state, and to connect the path between the second power supply unit and the power input terminal of the target fan when the server is in the second state.

[0010] The first state is the S0 state of the server, and the second state is the S5 state of the server. Through the fan power supply circuit of the present application, the server can use the second power supply unit to operate the target fan through the auxiliary power supply unit in the S5 state, thereby providing normal heat dissipation for the target components and avoiding hardware failures or server performance degradation.

[0011] In a possible implementation manner, the main power supply unit includes a first subunit and a second subunit;

[0012] The first power supply unit is electrically connected to the first subunit, the first subunit is electrically connected to the second subunit, and the second subunit is electrically connected to the power input terminal of the target fan;

[0013] The first subunit is used to conduct the path between the first power supply unit and the ground terminal and send a first level signal to the control terminal of the second subunit when receiving a valid first enable signal sent by the control unit;

[0014] The second subunit is used to connect the path between the first power supply unit and the power input terminal of the target fan after receiving the first level signal.

[0015] By dividing the main power supply unit into two parts through the enable signal, the on-off of the main power supply circuit can be controlled, thereby improving the stability and controllability of the circuit.

[0016] In a possible implementation manner, the first subunit includes a first capacitor, a first switch tube, a first resistor, and a second resistor;

[0017] The first end of the first resistor is electrically connected to the first power supply unit and the first end of the second subunit, and the second end of the first resistor is electrically connected to the first end of the second resistor, the first end of the first capacitor, and the control end of the second subunit;

[0018] The second end of the second resistor is electrically connected to the first end of the first switch tube;

[0019] The second end of the first switch tube is electrically connected to the ground end, and the control end of the first switch tube is used to receive the first enable signal;

[0020] The second end of the first capacitor is electrically connected to the ground end.

[0021] The first power supply unit is powered by a first resistor and a second resistor to divide the voltage, and the first capacitor is used to filter out high-frequency noise, thereby playing a filtering role, reducing the interference of noise on voltage stability and ensuring the stability of the circuit.

[0022] In a possible implementation manner, the second subunit includes a second switch tube, a third resistor, a fourth resistor and a fifth resistor;

[0023] The first end of the second switch tube is electrically connected to the first end of the third resistor, the first end of the fourth resistor and the first end of the first resistor, and the second end of the second switch tube is electrically connected to the second end of the third resistor, the second end of the fourth resistor, the first end of the fifth resistor and the power input end of the target fan;

[0024] A first end of the fifth resistor is connected to a power input end of the target fan, and a second end of the fifth resistor is electrically connected to a ground end.

[0025] By setting the third resistor and the fourth resistor, the voltage impact on the second switch tube is reduced, so that the power-on process of the second switch tube is smoother. The fifth resistor can ensure that the voltage state of the circuit node is stable, avoiding the pin connected to the second switch tube from being in a floating state.

[0026] In a possible implementation manner, the secondary power supply unit includes a third subunit, a fourth subunit and a fifth subunit;

[0027] The third subunit is electrically connected to the fourth subunit, the fifth subunit and the second power supply unit, the fourth subunit is also electrically connected to the fifth subunit and the second power supply unit, and the fifth subunit is also electrically connected to the power input terminal of the target fan and the second power supply unit;

[0028] The third subunit is used to disconnect the path between the second power supply unit and the ground terminal and send a second level signal to the fourth subunit when the second enable signal sent by the control unit fails;

[0029] The fourth subunit is configured to, when receiving the second level signal, conduct a path between the second power supply unit and the ground terminal, and send a third level signal to the fifth subunit;

[0030] The fifth subunit is used to connect the path between the second power supply unit and the power input terminal of the target fan when receiving the third level signal.

[0031] The auxiliary power supply unit is divided into three parts, and the on-off of the circuit corresponding to the power supply of the second power supply unit can be controlled by an enable signal.

[0032] In a possible implementation manner, the third subunit includes a third switch tube, a sixth resistor and a seventh resistor;

[0033] The first end of the third switch tube is electrically connected to the first end of the sixth resistor, the control end of the third switch tube is electrically connected to the first end of the seventh resistor, the control end of the third switch tube is used to receive the second enable signal sent by the control unit, and the second end of the third switch tube is electrically connected to the second end of the seventh resistor and the ground end;

[0034] The second end of the sixth resistor is electrically connected to the second power supply unit, the first end of the fourth subunit and the first end of the fifth subunit.

[0035] The power supply of the second power supply unit is divided by the sixth resistor and the seventh resistor to prevent the third switch tube from being subjected to excessive voltage shock.

[0036] In a possible implementation manner, the second subunit further includes a fourth switch tube;

[0037] The first end of the fourth switch tube is electrically connected to the power input end of the target fan, the second end of the fourth switch tube is electrically connected to the first end of the fifth resistor, and the control end of the fourth switch tube is electrically connected to the first end of the third switch tube.

[0038] A fourth switch tube is introduced into the second subunit to prevent the second power supply unit from supplying power to the main power supply unit, causing current to break through circuit elements in the main power supply unit, thereby protecting the circuit elements in the circuit.

[0039] In a possible implementation manner, the fourth subunit includes a fifth switch tube, an eighth resistor, a ninth resistor, a tenth resistor and a second capacitor;

[0040] The control end of the fifth switch tube is electrically connected to the first end of the eighth resistor, the first end of the fifth switch tube is electrically connected to the first end of the ninth resistor, and the second end of the fifth switch tube is electrically connected to the ground end;

[0041] The second end of the eighth resistor is electrically connected to the first end of the sixth resistor and the first end of the third switch tube;

[0042] The second end of the ninth resistor is electrically connected to the first end of the tenth resistor, the first end of the second capacitor and the control end of the fifth subunit;

[0043] The second end of the tenth resistor is electrically connected to the second power supply unit and the first end of the fifth subunit;

[0044] The second end of the second capacitor is electrically connected to the ground end.

[0045] The power supply of the second power supply unit is divided by the ninth resistor and the tenth resistor, and the high-frequency noise is filtered out by the second capacitor, thereby playing a filtering role, reducing the interference of noise on voltage stability and ensuring the stability of the circuit.

[0046] In a possible implementation manner, the fifth subunit includes a sixth switch tube;

[0047] The first end of the sixth switch tube is electrically connected to the second power supply unit, the second end of the sixth switch tube is electrically connected to the power input end of the target fan, and the control end of the sixth switch tube is electrically connected to the second end of the ninth resistor.

[0048] The sixth switch tube determines whether to use the second power supply unit power provided by the second power supply unit to power the target fan, thereby ensuring that the circuit can be turned on under the mutual constraints of each sub-unit, thereby avoiding uncontrollable situations in the circuit.

[0049] In a second aspect, an embodiment of the present application provides a server, comprising: a target component, a target fan, and the fan power supply circuit in the first aspect;

[0050] The fan power supply circuit is used to provide a power supply voltage for the target fan;

[0051] The target fan is used to dissipate heat for the target component.

[0052] An embodiment of the present application provides a fan power supply circuit and a server, wherein the fan power supply circuit can be applied to a server including a target component and a target fan, the target fan can dissipate heat for the target component, the fan power supply circuit includes a first power supply unit for outputting a first voltage when the server is in a first state, and a second power supply unit for outputting a second voltage when the server is in a second state; and a main power supply unit for conducting a path between the first power supply unit and the power input terminal of the target fan when the server is in the first state, and an auxiliary power supply unit for conducting a path between the second power supply unit and the power input terminal of the target fan when the server is in the second state, wherein the first state is the S0 state of the server, and the second state is the S5 state of the server. Through the fan power supply circuit of the present application, the server can run the target fan in the S5 state, thereby dissipating heat for the target component normally and avoiding hardware failure or server performance degradation. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0054] Figure 1 A schematic diagram of the structure of a server provided in an embodiment of the present application;

[0055] Figure 2 A structural block diagram of a fan power supply circuit provided in an embodiment of the present application;

[0056] Figure 3 A schematic diagram of the structure of a fan power supply circuit provided in an embodiment of the present application;

[0057] Figure 4 A schematic diagram of the structure of another fan power supply circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0059] It should be noted that the terms "including" and "having" and their variations involved in the documents of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0060] The terms "first" and "second" in this document are used for descriptive purposes only and should not be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0061] The word “exemplary” is used hereinafter to mean “serving as an example, example, or illustration.” Any embodiment described as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0062] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0063] Figure 1 A schematic diagram of the structure of a server provided in an embodiment of the present application is shown, and the server is an application scenario of the fan power supply circuit of the present application, see Figure 1 As shown, the server 100 internally includes a baseboard management controller (BMC) 200, a fan power supply circuit 300, a target fan 400, and a target component 500, wherein the BMC 110 can determine whether the server is in the S0 state or the S5 state by detecting the in-place signal in the server. For example, when the server 100 is in the S0 state, the BMC can detect that the in-place signal is at a high level; when the server 100 is in the S5 state, the BMC can detect that the in-place signal is at a low level. It should be noted that the in-place signal can be set differently, and a high level can be used to indicate that the server 100 is in the S0 state, but a high level can also be used to indicate that the server 100 is in the S5 state. Similarly, a low level can be used to indicate that the server 100 is in the S0 state, and a low level can also be used to indicate that the server 100 is in the S5 state. When BMC200 detects that the server 100 is in the S0 state or the S5 state, it can send the state of the server 100 to the fan power supply circuit 300. The fan power supply circuit 300 can use different power supply units to provide power supply voltage to the target fan 400 according to the different states of the server 100, so that the target fan 400 can dissipate heat for the target component 500.

[0064] The classification and extraction method provided by the exemplary embodiment of the present application is described below in combination with the application scenarios described above and with reference to the accompanying drawings. It should be noted that the above application scenarios are only shown to facilitate understanding of the spirit and principles of the present application, and the implementation of the present application is not limited in this regard.

[0065] Figure 2 FIG. 4 shows a structural block diagram of a fan power supply circuit provided in an embodiment of the present application. Figure 2As shown, the fan power supply circuit 300 includes a first power supply unit 310, a second power supply unit 320, a main power supply unit 330, and an auxiliary power supply unit 340, wherein the first power supply unit 310 may be MAIN power (main power supply) provided by the mainboard power supply. When the server is in the S0 state, that is, after the server is started, all components in the server system are in working state, the MAIN power can supply a 12V voltage. However, when the server is in the S5 state, that is, when the server is in the standby state or only the basic functional components are in working state, the MAIN power does not supply voltage; the second power supply unit 320 may be STBY power (standby power supply) provided by the mainboard power supply. Regardless of whether the server is in the S0 state or the S5 state, the STBY power can supply a 12V voltage with a smaller current, or a 5V voltage. The voltage provided may also be different depending on the server. The STBY power can support some background activities of the mainboard when the server is in the standby state.

[0066] In the related art, the server fan is powered only by MAIN power, and STBY power is not used, resulting in that in the S5 state, the MAIN power cannot power the target fan. In addition, as more and more components are required to work in the S5 state, the working state of the original fan cannot meet the normal heat dissipation of the server in the S5 state, which may cause hardware failure or server performance degradation.

[0067] However, the present application can use STBY power to supply power to the target fan in the S5 state, so that the speed of the target fan in the S5 state can meet the normal heat dissipation of the server, avoiding hardware failure or server performance degradation.

[0068] The classification and extraction method provided by the exemplary embodiment of the present application is described below in combination with the application scenarios described above and with reference to the accompanying drawings. It should be noted that the above application scenarios are only shown to facilitate understanding of the spirit and principles of the present application, and the implementation of the present application is not limited in this regard.

[0069] Figure 3 FIG. 4 shows a schematic diagram of a fan power supply circuit provided in an embodiment of the present application. Figure 3As shown, the circuit structure can be divided into two parts with the power input end of the target fan as a dividing line, namely a main power supply unit connected to the first power supply unit, and a secondary power supply unit connected to the second power supply unit. Wherein, the first power supply unit can be used to output a first voltage (MAIN power) when the server is in a first state (S0 state), the second power supply unit can be used to output a second voltage (STBY power) when the server is in a second state (S5 state), the main power supply unit can be used to conduct the path between the first power supply unit and the power input terminal of the target fan when the server is in the first state, so that the first power supply unit can supply power to the target fan, and when the server is in the second state, disconnect the path between the first power supply unit and the power input terminal of the target fan, thereby avoiding interference with the second power supply unit supplying power to the target fan, and when the server is in the second state, conduct the path between the second power supply unit and the power input terminal of the target fan, so that the second power supply unit can supply power to the target fan. The main power supply unit and the auxiliary power supply unit will be introduced according to the division of different sub-units.

[0070] In a possible embodiment, the main power supply unit can be divided into a first subunit and a second subunit, wherein the first subunit may include R1 (first resistor), R2 (second resistor), C1 (first capacitor) and Q1 (first switch tube), the second subunit may include Q2 (second switch tube), R3 (third resistor), R4 (fourth resistor), R5 (fifth resistor), the first power supply unit is electrically connected to the first subunit, the first subunit is electrically connected to the second subunit, and the second subunit is electrically connected to the power input terminal of the target fan. It should be noted that Q1 can be an NMOS tube and Q2 can be a PMOS tube.

[0071] In a possible embodiment, the first subunit can conduct the path between the first power supply unit and the ground terminal and send a first level signal to the control terminal of the second subunit when receiving a valid first enable signal sent by the control unit, wherein the control unit can be a complex programmable logic device (CPLD), and the CPLD can decide to set the first enable signal to a high level or a low level according to whether the server system is started and whether the server system contains a target component. Usually, when the server system is started or does not contain a target component, the CPLD can set the first enable signal to a high level, that is, valid. If the server system is not started and the server system contains a target component, the CPLD can set the first enable signal to a low level, that is, invalid. The second subunit can conduct the path between the first power supply unit and the power input terminal of the target fan after receiving the first level signal sent by the first subunit.

[0072] Specifically, through Figure 3 It can be determined that the first end of R1 in the first subunit is electrically connected to the first power supply unit, the first end of R1 is also electrically connected to the first end of the second subunit, that is, the first end of R1 is electrically connected to the first end of Q2, the second end of R1 is electrically connected to the first end of R2, the second end of R1 is also electrically connected to the first end of C1, the second end of R1 is also electrically connected to the control end of the second subunit, that is, electrically connected to the control end of Q2, the second end of R2 is electrically connected to the first end of Q1, the second end of Q1 is electrically connected to the ground end, the control end of Q1 can receive the first enable signal sent by the CPLD, and the second end of C1 is electrically connected to the ground end. The first end of Q2 in the second subunit is electrically connected to the first end of R3, the first end of Q2 is electrically connected to the first end of R4, the first end of Q2 is also electrically connected to the first end of R1, the second end of Q2 is electrically connected to the second end of R3, the second end of Q2 is also electrically connected to the second end of R4, the second end of Q2 is also electrically connected to the first end of R5, the first end of R5 is electrically connected to the power input end of the target fan, and the second end of R5 is electrically connected to the ground end.

[0073] In a possible embodiment, the auxiliary power supply unit can be divided into a third subunit, a fourth subunit and a fifth subunit, wherein the third subunit may include Q3 (third switch tube), R6 (sixth resistor), R7 (seventh resistor), the fourth subunit may include Q5 (fifth switch tube), R8 (eighth resistor), R9 (ninth resistor), R10 (tenth resistor), C2 (second capacitor), the fifth subunit may include Q6 (sixth switch tube), the third subunit is electrically connected to the fourth subunit, the third subunit is also electrically connected to the team subunit, the third subunit is also electrically connected to the second power supply unit, the fourth subunit is electrically connected to the second power supply unit, the fourth subunit is also electrically connected to the fifth subunit, the fifth subunit is also electrically connected to the power input terminal of the target fan, and the team subunit is also electrically connected to the second power supply unit. It should be noted that Q3 and Q5 can be NMOS tubes, and Q6 can be a PMOS tube.

[0074] In a possible embodiment, the third subunit can disconnect the path between the second power supply unit and the ground terminal and send a second level signal to the fourth subunit when the second enable signal sent by the received CPLD fails. The fourth subunit can open the path between the second power supply unit and the ground segment and send a third level signal to the fifth subunit when the second level signal is received. The fifth subunit can open the path between the second power supply unit and the power input terminal of the target fan when the third level signal is received.

[0075] Specifically, through Figure 3It can be determined that the first end of Q3 in the third subunit is electrically connected to the first end of R6, the control end of Q3 is electrically connected to the first end of R7, and at the same time, the control end of Q3 can also be used to receive the second enable signal sent by the CPLD, the second end of Q3 is electrically connected to the second end of R7, the second end of Q3 is electrically connected to the ground end, the second end of R6 is electrically connected to the second power supply unit, R6 is also electrically connected to the first end of the fourth subunit, R6 is also electrically connected to the first end of the fifth subunit, the control end of Q5 in the fourth subunit is electrically connected to the first end of R8, the first end of Q5 is electrically connected to the first end of R9, and the second end of Q5 is electrically connected to the ground end. The second end of R8 is electrically connected to the first end of R6, the second end of R8 is also electrically connected to the first end of Q3, the second end of R9 is electrically connected to the first end of R10, the second end of R9 is electrically connected to the first end of C2, the second end of R9 is also electrically connected to the control end of the fifth subunit, the second end of R10 is electrically connected to the second power supply unit, the second end of R10 is also electrically connected to the first end of the fifth subunit, the second end of C2 is electrically connected to the ground end, Q6 of the fifth subunit is electrically connected to the second power supply unit, the second end of Q6 is electrically connected to the power input end of the target fan, and the control end of Q6 is electrically connected to the second end of R9. It should be noted that some connection relationships that are not expressed are implied in the above connection relationship, for example, the second end of R9 is electrically connected to the first end of R10, and the control end of Q6 is electrically connected to the second end of R9, then it can be determined that the electrical connection relationship between the control end of Q6 and the first end of R10 is implied.

[0076] In a possible embodiment, through the connection method of the above-mentioned main power supply unit and the auxiliary power supply unit, it is possible to power the target fan in the S5 state by using STBY power, so that the speed of the target fan in the S5 state can meet the normal heat dissipation of the server, avoiding hardware failure or server performance degradation.

[0077] Specifically, when the server is in the S0 state, regardless of whether the target component is included in the server system, the first enable signal and the second enable signal sent by the CPLD are both high-level, the first power supply unit can output MAIN power, and the second power supply unit can output STBY power. In the main power supply unit, when the first enable signal is high-level, the control end of Q1 is high-level, Q1 acts as an NMOS tube, and when the control end potential is high-level, Q1 is turned on. At this time, the MAIN power provided by the first power supply unit is divided by R1 and R2, and the voltage is less than 12V. C1 can filter out high-frequency noise, thereby playing a filtering role, which can reduce the interference of noise on voltage stability. Since the voltage at the control end of Q2 is less than 12V, Q2 is turned on, and R3 and R4 can play the role of current limiting and stabilizing the power-on voltage. The resistance value is much larger than the state of Q2 being on. When Q2 is on, the resistance inside Q2 is close to 0 compared with R3 and R4, so the current can pass through Q2, thereby outputting the MAIN power to the power input terminal of the target fan. By setting R3 and R4, the voltage impact on Q2 can be reduced, and the power-on process is smoother. R5 is a pull-down resistor. When Q2 is not working, the pin connected to Q2 is in an uncertain state. R5 can ensure that the voltage state of the circuit node is stable, avoiding the pin connected to Q2 from being in a floating state. In the auxiliary power supply unit, the control end of Q3 is at a high level, and Q3 can be turned on as an NMOS tube. When Q3 is turned on, the STBY power output by the second power supply unit is electrically connected to the ground terminal, and the third sub-unit cannot send the second level signal to the fourth sub-unit. The fourth sub-unit cannot send the third level signal to the fifth sub-unit, and the fifth sub-unit cannot conduct the path between the second power supply unit and the power input terminal of the target fan. Therefore, the auxiliary power supply unit cannot be turned on, and the STBY power cannot be input to the power input terminal of the target fan, thereby realizing that when the server is in S0 state, the MAIN power is used to power the target fan.

[0078] Specifically, when the server is in the S5 state, if the server system includes the target component, the first enable signal and the second enable signal sent by the CPLD are both low level, the first power supply unit does not output voltage, and the second power supply unit can output STBY power. In the auxiliary power supply unit, the control end of Q3 is low level, and Q3 as an NMOS tube cannot conduct the circuit between the second power supply unit and the ground terminal. R6 and R7 both play the role of smoothing the voltage. When the circuit between the second power supply unit and the ground terminal is not conducting, the fourth subunit receives the second level signal, which is equivalent to the control end of Q5 in the fourth subunit being connected to the second power supply unit. Q5 is conducting, and the STBY power is divided by R9 and R10, and the STBY power output to Q6 of the fifth subunit is less than 12V. Therefore, Q6 is conducting, and the STBY power can be output to the voltage input end of the target fan through Q6, wherein the functions of R9 and R10 are basically the same as those of R1 and R2, and will not be repeated here. Since the first power supply unit connected to the main power supply unit does not output voltage, whether the main power supply unit is turned on or off will not affect the power supply voltage received by the target fan.

[0079] Specifically, when the server is in the S5 state, if the server system does not include the target component, the first enable signal and the second enable signal sent by the CPLD are both high level, the first power supply unit does not output voltage, and the second power supply unit can output STBY power. In the auxiliary power supply unit, the control end of Q3 is high level, and Q3, as an NMOS tube, conducts the circuit between the second power supply unit and the ground terminal. Therefore, Q5 and Q6 will not be turned on, and STBY power will not be output to the voltage input terminal of the target fan. Since the first power supply unit connected to the main power supply unit does not output voltage, whether the main power supply unit is turned on or not will not affect the power supply voltage received by the target fan.

[0080] In another possible embodiment, Figure 4 FIG. 2 shows a schematic diagram of the structure of another fan power supply circuit provided in an embodiment of the present application. Figure 4As shown, Q4 (fourth switch tube) can be set in the second subunit, the first end of Q4 is electrically connected to the power input end of the target fan, the second end of Q4 is electrically connected to the first end of R5, and the control end of Q4 is electrically connected to the first end of Q3 in the third subunit. When the server is in the S5 state, if the server system includes the target component, the first enable signal and the second enable signal sent by the CPLD are both low level, the first power supply unit does not output voltage, and the second power supply unit can output STBY electricity. Since the second enable signal is low level, Q3 is in a non-conducting state, then the level signal connected to the control end of Q4 should be high level, and Q4 will not be turned on. When the second power supply unit uses STBY electricity to provide voltage to the power input end of the target fan, the current will not flow back to the main power supply circuit, and Q4 can protect the main power supply circuit.

[0081] An embodiment of the present application provides a fan power supply circuit and a server, wherein the fan power supply circuit can be applied to a server including a target component and a target fan, the target fan can dissipate heat for the target component, the fan power supply circuit includes a first power supply unit for outputting a first voltage when the server is in a first state, and a second power supply unit for outputting a second voltage when the server is in a second state; and a main power supply unit for conducting a path between the first power supply unit and the power input terminal of the target fan when the server is in the first state, and an auxiliary power supply unit for conducting a path between the second power supply unit and the power input terminal of the target fan when the server is in the second state, wherein the first state is the S0 state of the server, and the second state is the S5 state of the server. Through the fan power supply circuit of the present application, the server can run the target fan in the S5 state, thereby dissipating heat for the target component normally and avoiding hardware failure or server performance degradation.

[0082] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0083] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0084] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0085] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0086] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A fan power supply circuit, characterized in that: Applied to servers; The server comprises: a target component and a target fan, wherein the target fan is used to dissipate heat for the target component; the fan power supply circuit comprises: a first power supply unit, a second power supply unit, a main power supply unit and a secondary power supply unit; The first power supply unit is configured to output a first voltage when the server is in a first state; The second power supply unit is configured to output a second voltage when the server is in a second state, wherein a current corresponding to the first voltage is greater than a current corresponding to the second voltage; The main power supply unit is used to connect the path between the first power supply unit and the power input terminal of the target fan when the server is in the first state, and disconnect the path between the first power supply unit and the power input terminal of the target fan when the server is in the second state; The auxiliary power supply unit is used to disconnect the path between the second power supply unit and the power input terminal of the target fan when the server is in the first state, and to connect the path between the second power supply unit and the power input terminal of the target fan when the server is in the second state.

2. The circuit according to claim 1, characterized in that The main power supply unit includes a first subunit and a second subunit; The first power supply unit is electrically connected to the first subunit, the first subunit is electrically connected to the second subunit, and the second subunit is electrically connected to the power input terminal of the target fan; The first subunit is used to conduct the path between the first power supply unit and the ground terminal and send a first level signal to the control terminal of the second subunit when receiving a valid first enable signal sent by the control unit; The second subunit is used to connect the path between the first power supply unit and the power input terminal of the target fan after receiving the first level signal.

3. The circuit according to claim 2, characterized in that The first subunit includes a first capacitor, a first switch tube, a first resistor and a second resistor; The first end of the first resistor is electrically connected to the first power supply unit and the first end of the second subunit, and the second end of the first resistor is electrically connected to the first end of the second resistor, the first end of the first capacitor, and the control end of the second subunit; The second end of the second resistor is electrically connected to the first end of the first switch tube; The second end of the first switch tube is electrically connected to the ground end, and the control end of the first switch tube is used to receive the first enable signal; The second end of the first capacitor is electrically connected to the ground end.

4. The circuit according to claim 3, characterized in that The second subunit includes a second switch tube, a third resistor, a fourth resistor and a fifth resistor; The first end of the second switch tube is electrically connected to the first end of the third resistor, the first end of the fourth resistor and the first end of the first resistor, and the second end of the second switch tube is electrically connected to the second end of the third resistor, the second end of the fourth resistor, the first end of the fifth resistor and the power input end of the target fan; A first end of the fifth resistor is connected to a power input end of the target fan, and a second end of the fifth resistor is electrically connected to a ground end.

5. The circuit according to claim 2, characterized in that The secondary power supply unit includes a third subunit, a fourth subunit and a fifth subunit; The third subunit is electrically connected to the fourth subunit, the fifth subunit and the second power supply unit, the fourth subunit is also electrically connected to the fifth subunit and the second power supply unit, and the fifth subunit is also electrically connected to the power input terminal of the target fan and the second power supply unit; The third subunit is used to disconnect the path between the second power supply unit and the ground terminal and send a second level signal to the fourth subunit when the second enable signal sent by the control unit fails; The fourth subunit is configured to, when receiving the second level signal, conduct a path between the second power supply unit and the ground terminal, and send a third level signal to the fifth subunit; The fifth subunit is used to connect the path between the second power supply unit and the power input terminal of the target fan when receiving the third level signal.

6. The circuit according to claim 5, characterized in that The third subunit includes a third switch tube, a sixth resistor and a seventh resistor; The first end of the third switch tube is electrically connected to the first end of the sixth resistor, the control end of the third switch tube is electrically connected to the first end of the seventh resistor, the control end of the third switch tube is used to receive the second enable signal sent by the control unit, and the second end of the third switch tube is electrically connected to the second end of the seventh resistor and the ground end; The second end of the sixth resistor is electrically connected to the second power supply unit, the first end of the fourth subunit and the first end of the fifth subunit.

7. The circuit according to claim 6, characterized in that The second subunit further includes a fourth switch tube; The first end of the fourth switch tube is electrically connected to the power input end of the target fan, the second end of the fourth switch tube is electrically connected to the first end of the fifth resistor, and the control end of the fourth switch tube is electrically connected to the first end of the third switch tube.

8. The circuit according to claim 6, characterized in that The fourth subunit includes a fifth switch tube, an eighth resistor, a ninth resistor, a tenth resistor and a second capacitor; The control end of the fifth switch tube is electrically connected to the first end of the eighth resistor, the first end of the fifth switch tube is electrically connected to the first end of the ninth resistor, and the second end of the fifth switch tube is electrically connected to the ground end; The second end of the eighth resistor is electrically connected to the first end of the sixth resistor and the first end of the third switch tube; The second end of the ninth resistor is electrically connected to the first end of the tenth resistor, the first end of the second capacitor and the control end of the fifth subunit; The second end of the tenth resistor is electrically connected to the second power supply unit and the first end of the fifth subunit; The second end of the second capacitor is electrically connected to the ground end.

9. The circuit according to claim 8, characterized in that The fifth subunit includes a sixth switch tube; The first end of the sixth switch tube is electrically connected to the second power supply unit, the second end of the sixth switch tube is electrically connected to the power input end of the target fan, and the control end of the sixth switch tube is electrically connected to the second end of the ninth resistor.

10. A server, characterized in that: include: A target component, a target fan, and a fan power supply circuit as claimed in any one of claims 1 to 9; The fan power supply circuit is used to provide a power supply voltage for the target fan; The target fan is used to dissipate heat for the target component.

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