Power supply circuit

Abstract

Embodiments of the present application provide a power supply circuit. When the power supply of an input power supply of a server is abnormal, a first voltage conversion module inputs a low-level voltage into a gate of a second MOS transistor, so that the second MOS transistor is turned on; in this case, a second voltage input by an external mobile power supply can be input into the second MOS transistor by means of an interface module, and the second MOS transistor divides the second voltage to obtain a third voltage and inputs the third voltage into a second voltage conversion module; and the second voltage conversion module can convert the third voltage into a fourth voltage to supply power to a baseboard management controller. Therefore, the external mobile power supply is used for reversely supplying power to the baseboard management controller, so that the baseboard management controller inside the server is temporarily provided with a working power supply, and background personnel can continue to acquire log information inside the baseboard management controller to quickly know the cause of a power supply abnormality that occurs in the server, thereby achieving rapid positioning of abnormalities, and providing convenience for users.

Description

A power supply circuit

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China on February 5, 2024, with application number 202410166572.0 and application name “A Power Supply Circuit,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of computers, and in particular to a power supply circuit. Background Art

[0004] At present, the electronic information industry is constantly developing towards digitalization and intelligence, and server data centers are developing particularly rapidly. However, the realization of digitalization and intelligent functions of servers still depends on stable and normal power supply.

[0005] In related technologies, when an abnormality occurs in the power supply of a server, the server board needs to be removed from the shelf and repaired, and an external power supply is used to power the baseboard management controller chip and digital chip on the abnormal board by welding flying wires. This method is time-consuming and labor-intensive, and the backstage personnel cannot obtain the cause of the board abnormality in the first time. In addition, the board may be damaged secondary to the welding flying wire process, affecting the collection of board abnormality logs.

[0006] Summary of the Invention

[0007] In view of the above problems, embodiments of the present application are proposed to provide a power supply circuit that overcomes the above problems or at least partially solves the above problems.

[0008] To solve the above problems, the present application discloses a power supply circuit, which includes a first voltage conversion module, a first MOS transistor, a second voltage conversion module, a second MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor), a baseboard management controller, and an interface module;

[0009] The output end of the first voltage conversion module is connected to the input end of the first MOS transistor and the gate of the second MOS transistor respectively, and the input end of the first voltage conversion module is connected to the gate of the first MOS transistor. The first voltage conversion module is used to output a first voltage to the gates of the first MOS transistor and the second MOS transistor when the input power supply is abnormal; the first voltage is a low-level voltage;

[0010] The output end of the first MOS transistor is connected to the input end of the second voltage conversion module and the output end of the second MOS transistor respectively, and the first MOS transistor is used to disconnect when an abnormality in the input power supply is detected;

[0011] The interface module is connected to the input end of the second MOS tube, and the interface module is used to input the second voltage input by the external mobile power supply into the second MOS tube, where the second voltage is a high-level voltage;

[0012] The second MOS transistor is used to be turned on when the first voltage is detected, and input a third voltage obtained by dividing the second voltage into the second voltage conversion module;

[0013] An output end of the second voltage conversion module is connected to the baseboard management controller. The second voltage conversion module is used to convert the third voltage into a fourth voltage to supply power to the baseboard management controller.

[0014] In some embodiments, the power supply circuit also includes: a power protection module, a complex editable logic device; the input end of the power protection module is respectively connected to the output end of the first MOS tube and the output end of the second MOS tube, the output end of the power protection module is connected to the interface module and the input end of the second MOS tube, the input end of the complex editable logic device is connected to the power indication pin of the first voltage conversion module, the output end of the complex editable logic device is connected to the enable pin of the power protection module, the complex editable logic device is used to output a low-level general input and output signal to the power protection module when a low-level signal is detected, and the power protection module is used to disconnect when receiving the low-level general input and output signal.

[0015] In some embodiments, the first voltage conversion module is used to convert the fifth voltage of the input power supply into a sixth voltage when the input power supply is normal, and input the sixth voltage to the gates of the first MOS tube and the second MOS tube respectively, and input the high-level signal to the complex programmable logic device. The sixth voltage is a high-level voltage.

[0016] In some embodiments, the complex programmable logic device is configured to output a high-level general-purpose input / output signal to an enable pin of the power protection module when a high-level signal is detected.

[0017] In some embodiments, the first MOS transistor is further configured to divide the sixth voltage to obtain a seventh voltage, which is input to the second voltage conversion module and the power protection module respectively.

[0018] In some embodiments, the second MOS transistor is further configured to be disconnected when detecting the sixth voltage output by the first voltage conversion module.

[0019] In some embodiments, the power protection module is further configured to be turned on when a high-level universal input / output signal is detected, and to convert the seventh voltage into an eighth voltage and input it to the interface module to charge the external mobile power supply.

[0020] In some embodiments, the power supply circuit further includes a first resistor, one end of the first resistor is connected to the gate of the first MOS transistor, and the other end of the first resistor is connected to the input end of the first voltage conversion module.

[0021] In some embodiments, the power supply circuit also includes a second resistor and a third resistor, one end of the second resistor is connected to the input end of the second voltage conversion module, the other end of the second resistor is respectively connected to one end of the third resistor and the enable pin of the second voltage conversion module, and the other end of the third resistor is grounded.

[0022] In some embodiments, the power supply circuit also includes a fourth resistor and a fifth resistor, one end of the fourth resistor is connected to the output end of the first MOS tube, the other end of the fourth resistor is respectively connected to the enable pin of the power protection module, one end of the fifth resistor, and the output end of the complex editable logic device, and the other end of the fifth resistor is grounded.

[0023] In some embodiments, the power supply circuit further includes a sixth resistor, one end of the sixth resistor is connected to the gate of the second MOS transistor, and the other end of the sixth resistor is connected to the output end of the first voltage conversion module.

[0024] In some embodiments, the power supply circuit further includes a diode, one end of the diode is connected to the interface module, and the other end of the diode is grounded.

[0025] In some embodiments, the power supply circuit further includes a third voltage conversion module and a deployment device, the input end of the third voltage conversion module is connected to the output end of the first MOS tube, and the output end of the third voltage conversion module is connected to the deployment device.

[0026] In some embodiments, the power supply circuit also includes a seventh resistor and an eighth resistor, one end of the seventh resistor is connected to the input end of the third voltage conversion module, the other end of the seventh resistor is respectively connected to the enable pin of the third voltage conversion module and one end of the eighth resistor, and the other end of the eighth resistor is grounded.

[0027] In some embodiments, the first MOS transistor is an N-type MOS transistor, and the second MOS transistor is a P-type MOS transistor.

[0028] The embodiments of the present application include the following advantages:

[0029] The present application discloses a power supply circuit. When an abnormality occurs in the power supply input of a server, a first voltage conversion module inputs a low-level voltage to the gate of a second MOS transistor, turning on the second MOS transistor. At this time, a second voltage input from an external mobile power supply can be input to the second MOS transistor through an interface module. The second MOS transistor divides the second voltage to obtain a third voltage and inputs it to a second voltage conversion module. The second voltage conversion module can convert the third voltage into a fourth voltage to power a baseboard management controller, thereby using an external mobile power supply to reversely power the baseboard management controller, so that the baseboard management controller inside the server temporarily has an operational power supply, so that backstage personnel can continue to obtain log information inside the baseboard management controller, quickly understand the cause of the power supply abnormality of the server, and quickly locate the abnormal problem, providing convenience for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram of a power supply of a related technology provided by an embodiment of the present application;

[0031] FIG2 is a structural block diagram of a power supply circuit provided in an embodiment of the present application;

[0032] FIG3 is a structural block diagram of another power supply circuit provided in an embodiment of the present application;

[0033] FIG4 is a schematic diagram of a power supply circuit when an input power supply is abnormal, provided by an embodiment of the present application;

[0034] FIG5 is a schematic diagram of a power supply circuit when the input power supply is normal, provided by an embodiment of the present application;

[0035] FIG6 is a structural block diagram of another power supply circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0037] At this stage, the electronic information industry is constantly developing in the direction of digitalization and intelligence, and server data centers are developing particularly rapidly. The realization of digital and intelligent functions requires relying on various sensors and digital chips inside the server to collect and transmit information, so that back-end personnel can more intuitively obtain the internal operating status and log information of the server, and carry out business deployment and problem handling in a timely manner.

[0038] The realization of digital and intelligent functions still depends on the stable and normal power supply of the system: the sensors and digital chips that collect information need normal power supply, the baseboard management controller used for control and management needs normal power supply, and the network chip used for data transmission needs normal power supply.

[0039] When the system power supply is abnormal, the sensor, digital chip or baseboard management controller cannot obtain the power supply that can support stable operation. At this time, the back-end personnel cannot obtain any information about the server. The server network is completely interrupted and cannot be connected. Even if the digital chip or baseboard management controller inside the server has a black box log function, the cause of the server power supply abnormality cannot be obtained due to the power supply abnormality.

[0040] In the relevant technical solutions, when an abnormality occurs in the power supply of a server, the server can only be removed from the shelf for maintenance and the abnormal board card can be returned for repair. If you want to understand the log information when the server abnormality occurs, you need to power on the server again. However, in most cases, the abnormality in the power supply of the server is caused by damage to internal components, and the server can basically not be powered on normally again.

[0041] As shown in Figure 1, a power supply diagram of a related technology provided by an embodiment of the present application is shown. In the figure, an external power supply 1 is used to power the baseboard management controller on the abnormal board, and an external power supply 2 is used to power the digital chip on the abnormal board. However, this method is time-consuming and labor-intensive, and the background personnel cannot obtain the cause of the board abnormality in the first time, and the board may be damaged secondary during the welding process, affecting the collection of board abnormality logs.

[0042] One of the core concepts of the embodiments of the present application is that when an abnormality occurs in the power supply input to the server, the first voltage conversion module inputs a low-level voltage to the gate of the second MOS tube, and the second MOS tube is turned on. At this time, the second voltage input by the external mobile power supply can be input into the second MOS tube through the interface module, and the second MOS tube divides the second voltage to obtain a third voltage and inputs it into the second voltage conversion module. The second voltage conversion module can convert the third voltage into a fourth voltage to power the baseboard management controller, thereby using the external mobile power supply to reversely power the baseboard management controller, so that the baseboard management controller inside the server temporarily has a working power supply, so that the background personnel can continue to obtain the log information inside the baseboard management controller, quickly understand the cause of the power supply abnormality of the server, and quickly locate the abnormal problem, providing convenience for users.

[0043] 2 , a block diagram of a power supply circuit 10 according to an embodiment of the present application is shown. The power supply circuit 10 includes a first voltage conversion module 101 , a first MOS transistor 102 , a second voltage conversion module 103 , a second MOS transistor 104 , a baseboard management controller 105 , and an interface module 106 .

[0044] The output end of the first voltage conversion module 101 is respectively connected to the input end of the first MOS transistor 102 and the gate of the second MOS transistor 104. The input end of the first voltage conversion module 101 is connected to the gate of the first MOS transistor 102. The first voltage conversion module 101 is used to output a first voltage to the gates of the first MOS transistor 102 and the second MOS transistor 104 when the input power supply is abnormal. The first voltage is a low-level voltage.

[0045] In the embodiment of the present application, the first voltage conversion module 101 is connected to the input power supply. When the input power supply is abnormal, the voltage value of the input power supply is zero, and the first voltage output by the first voltage conversion module 101 is also zero, that is, a low-level voltage. At this time, the output end of the first voltage conversion module 101 can output the first voltage to the gate of the first MOS transistor 102 and the second MOS transistor 104.

[0046] The output end of the first MOS transistor 102 is connected to the input end of the second voltage conversion module 103 and the output end of the second MOS transistor 104 respectively. The first MOS transistor 102 is used to disconnect when detecting abnormal power supply of the input power supply.

[0047] In the embodiment of the present application, when the gate of the first MOS transistor 102 detects an abnormal input power supply, that is, when the voltage value of the input power supply is detected to be zero, the gate is disconnected, and at this time 102 is in a disconnected state.

[0048] The interface module 106 is connected to the input end of the second MOS transistor 104 and is used to input the second voltage input by the external mobile power supply into the second MOS transistor 104 , where the second voltage is a high-level voltage.

[0049] In the embodiment of the present application, the interface module is connected to the external mobile power supply, and the external mobile power supply can input the second voltage to the second MOS tube through the interface module.

[0050] The second MOS transistor 104 is configured to be turned on when the first voltage is detected, and input a third voltage obtained by dividing the second voltage into the second voltage conversion module 103 .

[0051] In the embodiment of the present application, since the gate of the second MOS transistor 104 is connected to the output end of the first voltage conversion module 101, and the second MOS transistor 104 is turned on when the voltage level is low, the first voltage conversion module 101 outputs the first voltage, which is a low-level voltage. Therefore, the second MOS transistor is turned on. At this time, the second MOS transistor can divide the second voltage input by the interface module 106 to obtain a third voltage and input it to the second voltage conversion module 103.

[0052] In some embodiments of the present application, the first MOS transistor is an N-type MOS transistor, and the second MOS transistor is a P-type MOS transistor.

[0053] An output end of the second voltage conversion module 103 is connected to the baseboard management controller 105 . The second voltage conversion module 103 is configured to convert the third voltage into a fourth voltage to supply power to the baseboard management controller 105 .

[0054] In an embodiment of the present application, after the second voltage conversion module 103 receives the third voltage input by the second MOS tube 104, it can convert the third voltage into a fourth voltage. The fourth voltage is the voltage required for the baseboard management controller to work. In some examples, the third voltage is 10v, and the voltage required for the baseboard management controller to work is 3.8v. The second voltage conversion module 103 can convert 10v into 3.8v, and then input the 3.8v voltage into the baseboard management controller to power it.

[0055] The present application discloses a power supply circuit. When an abnormality occurs in the power supply input of a server, the first voltage conversion module inputs a low-level voltage to the gate of a second MOS tube, and the second MOS tube is turned on. At this time, a second voltage input from an external mobile power supply can be input to the second MOS tube through an interface module. The second MOS tube divides the second voltage to obtain a third voltage and inputs it to the second voltage conversion module. The second voltage conversion module can convert the third voltage into a fourth voltage to power a baseboard management controller, thereby using the external mobile power supply to reversely power the baseboard management controller, so that the baseboard management controller inside the server temporarily has an operational power supply, so that backstage personnel can continue to obtain log information inside the baseboard management controller, quickly understand the cause of the power supply abnormality of the server, and quickly locate the abnormal problem, providing convenience for users.

[0056] 3 , a structural block diagram of a power supply circuit 10 provided in an embodiment of the present application is shown. The power supply circuit may further include: a power protection module 107 and a complex editable logic device 108. The input end of the power protection module 107 is respectively connected to the output end of the first MOS transistor 102 and the output end of the second MOS transistor 104, the output end of the power protection module 107 is connected to the input end of the interface module 106 and the second MOS transistor 104, the input end of the complex editable logic device 108 is connected to the power indication pin of the first voltage conversion module 101, and the output end of the complex editable logic device 108 is connected to the enable pin of the power protection module 107. The complex editable logic device 108 is configured to output a low-level general input / output signal to the power protection module 107 when a low-level signal is detected. The power protection module 107 is configured to disconnect when receiving the low-level general input / output signal.

[0057] In an embodiment of the present application, when the input power supply is abnormal, the complex editable logic device 108 detects that the power indication pin signal of the first voltage conversion module is a low-level signal, and the complex editable logic device 108 will control the output end to enter a low-resistance mode, so that the complex editable logic device 108 can output a low-level general input and output signal to the power protection module 107. When the power protection module 107 detects the low-level general input and output signal input by the complex editable logic control device, it is disconnected, that is, the power protection module 107 does not work at this time.

[0058] FIG4 shows a schematic diagram of a power supply circuit when an input power supply is abnormal, provided in an embodiment of the present application. An external mobile power supply is introduced through the interface module 106 , the gate voltage of the second MOS transistor 104 is zero, and the second MOS transistor 104 is turned on. At this time, the second voltage conversion module operates normally and converts a fourth voltage to power the baseboard management controller load.

[0059] In some embodiments of the present application, the first voltage conversion module 101 is also used to convert the fifth voltage of the input power supply into a sixth voltage when the input power supply is normal, and input the sixth voltage to the gates of the first MOS tube and the second MOS tube respectively, and input the high-level signal to the complex programmable logic device, and the sixth voltage is a high-level voltage.

[0060] In the embodiment of the present application, as shown in FIG3 , the first voltage conversion module 101 is further configured to convert the fifth voltage of the input power supply into a sixth voltage when the input power supply is normal, and then input the sixth voltage to the input end of the first MOS transistor 102 and the gate of the second MOS transistor 104 , respectively. Since the first voltage conversion module 101 is operating normally at this time, the power indication pin of the first voltage conversion module 101 can input a high-level signal to the complex programmable logic device 108 .

[0061] In some embodiments of the present application, the complex programmable logic device 108 is configured to output a high-level general-purpose input / output signal to the enable pin of the power protection module 107 when a high-level signal is detected.

[0062] In an embodiment of the present application, when the complex editable logic device 108 detects a high level input from the power indication pin of the first voltage conversion module 101, it can output a high-level general input / output signal to the enable pin of the power protection module 107, thereby enabling the enable pin of the power protection module 107 to operate normally when detecting a high-level general input / output signal.

[0063] In some embodiments of the present application, the first MOS transistor is further configured to divide the sixth voltage to obtain a seventh voltage, which is input to the second voltage conversion module 103 and the power protection module 107 respectively.

[0064] In the embodiment of the present application, after receiving the sixth voltage, the first MOS transistor 102 can divide the sixth voltage to obtain a seventh voltage which is input to the second voltage conversion module 103 and the power protection module 107 respectively.

[0065] In some embodiments of the present application, the second MOS transistor is further configured to be disconnected when detecting the sixth voltage output by the first voltage conversion module.

[0066] In some embodiments of the present application, the power protection module is further configured to be turned on when a high-level universal input / output signal is detected, and to convert the seventh voltage into an eighth voltage and input it into the interface module to charge the external mobile power supply.

[0067] In the embodiment of the present application, since the sixth voltage output by the first voltage conversion module 101 is a high-level voltage, the gate of the second MOS transistor 104 is disconnected after detecting the sixth voltage, that is, 104 does not work, and the power protection module 107 is turned on when a high-level universal input and output signal is detected. At this time, the power protection module 107 can convert the seventh voltage into an eighth voltage and input it to the interface module 106, thereby charging the external mobile power supply connected to the interface module 106.

[0068] As shown in Figure 5, a schematic diagram of a power supply circuit provided by an embodiment of the present application when the input power supply is normal is shown. The fifth voltage output by the input power supply is normal, the first voltage conversion module 101 operates normally, converts the sixth voltage, and feeds back the high-level signal to the complex editable logic device 108. The complex editable logic device 108 can input the high-level universal input and output signal to the enable pin of the power protection module 107. The power protection module 107 operates normally after detecting the high-level universal input and output signal. The gate of the first MOS tube 102 detects the high-level voltage and turns on. The sixth voltage is converted into the seventh voltage via the first MOS tube. The second voltage conversion module operates normally and can convert the eighth voltage to power loads such as the baseboard management controller. The power protection module 107 can also power the external mobile power supply connected to the interface module 106.

[0069] In some embodiments of the present application, the power supply circuit further includes a first resistor, one end of the first resistor is connected to the gate of the first MOS tube, and the other end of the first resistor is connected to the input end of the first voltage conversion module.

[0070] FIG6 shows a block diagram of another power supply circuit provided in an embodiment of the present application. The power supply circuit 10 may further include a first resistor R1. One end of the first resistor R1 is connected to the gate of the first MOS transistor 102, and the other end of the first resistor R1 is connected to the input end of the first voltage conversion module 101, thereby performing a shunting effect to prevent excessive current input to the first MOS transistor 102 from damaging the first MOS transistor 102.

[0071] In some embodiments of the present application, the power supply circuit also includes a second resistor and a third resistor, one end of the second resistor is connected to the input end of the second voltage conversion module, the other end of the second resistor is respectively connected to one end of the third resistor and the enable pin of the second voltage conversion module, and the other end of the third resistor is grounded.

[0072] In an embodiment of the present application, as shown in Figure 6, the power supply circuit 10 may further include a second resistor R2 and a third resistor R3, one end of the second resistor R2 is connected to the input end of the second voltage conversion module 103, the other end of the second resistor R2 is respectively connected to one end of the third resistor R3 and the enable pin of the second voltage conversion module 103, and the other end of the third resistor R3 is grounded. The second resistor R2 and the third resistor R3 can play a role in voltage division, which can prevent the voltage input to the second voltage conversion module 103 from being too large and causing damage to the second voltage conversion module 103.

[0073] In some embodiments of the present application, the power supply circuit also includes a fourth resistor and a fifth resistor, one end of the fourth resistor is connected to the output end of the first MOS tube, the other end of the fourth resistor is respectively connected to the enable pin of the power protection module, one end of the fifth resistor, and the output end of the complex editable logic device, and the other end of the fifth resistor is grounded.

[0074] In an embodiment of the present application, as shown in Figure 6, the power supply circuit 10 further includes a fourth resistor R4 and a fifth resistor R5. One end of the fourth resistor R4 is connected to the output end of the first MOS tube 102, and the other end of the fourth resistor R4 is respectively connected to the enable pin of the power protection module 107, one end of the fifth resistor R5, and the output end of the complex programmable logic device 108. The other end of the fifth resistor R5 is grounded. In the embodiment of the present application, the fourth resistor R4 and the fifth resistor R5 can divide the voltage output by the first MOS tube 102, thereby protecting the circuit.

[0075] In some embodiments of the present application, the power supply circuit further includes a sixth resistor, one end of the sixth resistor is connected to the gate of the second MOS tube, and the other end of the sixth resistor is connected to the output end of the first voltage conversion module.

[0076] In the embodiment of the present application, the power supply circuit 10 further includes a sixth resistor R6. One end of the sixth resistor R6 is connected to the gate of the second MOS transistor 104, and the other end of the sixth resistor R6 is connected to the output end of the first voltage conversion module 101. The sixth resistor R6 can function as a shunt to prevent excessive current input to the gate of the second MOS transistor 104 from damaging the second MOS transistor 104 and affecting the normal operation of the second MOS transistor 104.

[0077] In some embodiments of the present application, the power supply circuit further includes a diode, one end of the diode is connected to the interface module, and the other end of the diode is grounded.

[0078] In an embodiment of the present application, the power supply circuit may further include a diode D1, one end of the diode D1 being connected to the interface module 106, and the other end of the diode D1 being connected to the ground. The diode D1 may absorb reverse current, thereby preventing the reverse current from being generated at the interface module 106 when the input power supply is cut off, causing the voltage input from the interface module 106 to become a negative value.

[0079] In some embodiments of the present application, the power supply circuit further includes a third voltage conversion module and a deployment device, the input end of the third voltage conversion module is connected to the output end of the first MOS tube, and the output end of the third voltage conversion module is connected to the deployment device.

[0080] Specifically, as shown in Figure 6, the power supply circuit may further include a third voltage conversion module 109 and a deployment device 110. When the input power supply is working normally, the third voltage conversion module 109 may convert the voltage output by the first MOS tube 102 into a target voltage to power the deployment device 110. When the input power supply is working abnormally, the third voltage conversion module 109 may receive the voltage input by the second MOS tube 104, convert the voltage input by the second MOS tube into a target voltage to power the deployment device 110. The deployment device may be other working devices deployed in the server, and the specific type is not limited here.

[0081] In some embodiments of the present application, the power supply circuit also includes a seventh resistor and an eighth resistor, one end of the seventh resistor is connected to the input end of the third voltage conversion module, the other end of the seventh resistor is respectively connected to the enable pin of the third voltage conversion module and one end of the eighth resistor, and the other end of the eighth resistor is grounded.

[0082] As shown in FIG6 , the power supply circuit 10 may further include a seventh resistor R7 and an eighth resistor R8 . The seventh resistor R7 and the eighth resistor R8 may function as a voltage divider to prevent the third voltage conversion module 109 from being damaged by an excessive voltage input to the third voltage conversion module 109 .

[0083] In some embodiments of the present application, the deployment device 110 may include a central processing unit (CPU) or a digital chip.

[0084] In some embodiments of the present application, the interface module 106 may include one of USB (Universal Serial Bus) and Type C (a USB interface form factor standard).

[0085] In the embodiments of the present application, USB (Universal Serial Bus) is an external bus standard that regulates the connection and communication between a computer and external devices. The universal serial bus interface has a hot-swappable function and can connect to a variety of peripherals, such as a mouse and keyboard. Type C is a set of symmetrical connectors. During use, there is no need to identify the interface direction as with USBA (USB Type-A, a USB interface standard), MiniUSB (Mini Universal Serial Bus), and MicroUSB (Micro Universal Serial Bus). It can withstand higher power and can support up to 100W of power. Therefore, the use of this interface can better support fast charging and higher data throughput. The ordinary specification also reaches a data bandwidth of 10Gb / s and can also be used for the transmission of high-definition video. The present application uses USB and Type C to adapt to different external mobile power supplies without the need for customized development, which can provide convenience for users.

[0086] The present application discloses a power supply circuit. When an abnormality occurs in the power supply input of a server, the first voltage conversion module inputs a low-level voltage to the gate of a second MOS tube, and the second MOS tube is turned on. At this time, a second voltage input from an external mobile power supply can be input to the second MOS tube through an interface module. The second MOS tube divides the second voltage to obtain a third voltage and inputs it to the second voltage conversion module. The second voltage conversion module can convert the third voltage into a fourth voltage to power a baseboard management controller, thereby using the external mobile power supply to reversely power the baseboard management controller, so that the baseboard management controller inside the server temporarily has an operational power supply, so that backstage personnel can continue to obtain log information inside the baseboard management controller, quickly understand the cause of the power supply abnormality of the server, and quickly locate the abnormal problem, providing convenience for users.

Claims

1. A power supply circuit, characterized in that: The power supply circuit includes a first voltage conversion module, a first MOS transistor, a second voltage conversion module, a second MOS transistor, a baseboard management controller, and an interface module; The output end of the first voltage conversion module is connected to the input end of the first MOS transistor and the gate of the second MOS transistor respectively, and the input end of the first voltage conversion module is connected to the gate of the first MOS transistor. The first voltage conversion module is used to output a first voltage to the gates of the first MOS transistor and the second MOS transistor when the input power supply is abnormal; the first voltage is a low-level voltage; The output end of the first MOS transistor is connected to the input end of the second voltage conversion module and the output end of the second MOS transistor respectively, and the first MOS transistor is used to disconnect when an abnormality in the input power supply is detected; The interface module is connected to the input end of the second MOS transistor, and the interface module is used to input the second voltage input by the external mobile power supply into the second MOS transistor, where the second voltage is a high-level voltage; The second MOS transistor is configured to be turned on when the first voltage is detected, and input a third voltage obtained by dividing the second voltage into the second voltage conversion module; An output end of the second voltage conversion module is connected to the baseboard management controller, and the second voltage conversion module is used to convert the third voltage into a fourth voltage to power the baseboard management controller.

2. The circuit according to claim 1, wherein: The power supply circuit also includes: a power protection module and a complex editable logic device; the input end of the power protection module is respectively connected to the output end of the first MOS tube and the output end of the second MOS tube, the output end of the power protection module is connected to the input end of the interface module and the second MOS tube, the input end of the complex editable logic device is connected to the power indication pin of the first voltage conversion module, and the output end of the complex editable logic device is connected to the enable pin of the power protection module; the complex editable logic device is used to output a low-level universal input / output signal to the power protection module when a low-level signal is detected, and the power protection module is used to disconnect when receiving the low-level universal input / output signal.

3. The power supply circuit according to claim 2, wherein: The first voltage conversion module is used to convert the fifth voltage input by the input power supply into a sixth voltage when the input power supply is normally supplied, and input the sixth voltage to the gates of the first MOS transistor and the second MOS transistor respectively, and input a high-level signal to the complex programmable logic device. The sixth voltage is a high-level voltage.

4. The power supply circuit according to claim 3, characterized in that: The complex programmable logic device is used to output a high-level universal input and output signal to the enable pin of the power protection module when detecting the high-level signal.

5. The power supply circuit according to claim 4, characterized in that: The first MOS transistor is further configured to divide the sixth voltage to obtain a seventh voltage, which is then input into the second voltage conversion module and the power protection module respectively.

6. The power supply circuit according to claim 5, characterized in that: The second MOS transistor is further configured to be disconnected when detecting the sixth voltage output by the first voltage conversion module.

7. The power supply circuit according to claim 5, characterized in that: The power protection module is further configured to be turned on when the high-level universal input / output signal is detected, and to convert the seventh voltage into an eighth voltage and input it into the interface module to charge the external mobile power supply.

8. The power supply circuit according to claim 1, wherein: The power supply circuit further includes a first resistor, one end of the first resistor is connected to the gate of the first MOS tube, and the other end of the first resistor is connected to the input end of the first voltage conversion module.

9. The power supply circuit according to claim 1, characterized in that: The power supply circuit also includes a second resistor and a third resistor, one end of the second resistor is connected to the input end of the second voltage conversion module, the other end of the second resistor is respectively connected to one end of the third resistor and the enable pin of the second voltage conversion module, and the other end of the third resistor is grounded.

10. The power supply circuit according to claim 2, wherein: The power supply circuit also includes a fourth resistor and a fifth resistor, one end of the fourth resistor is connected to the output end of the first MOS tube, the other end of the fourth resistor is respectively connected to the enable pin of the power protection module, one end of the fifth resistor, and the output end of the complex programmable logic device, and the other end of the fifth resistor is grounded.

11. The power supply circuit according to claim 1, wherein: The power supply circuit further includes a sixth resistor, one end of the sixth resistor is connected to the gate of the second MOS transistor, and the other end of the sixth resistor is connected to the output end of the first voltage conversion module.

12. The power supply circuit according to claim 1, wherein: The power supply circuit further includes a diode, one end of the diode is connected to the interface module, and the other end of the diode is grounded.

13. The power supply circuit according to claim 1, wherein: The power supply circuit further includes a third voltage conversion module and a deployment device. The input end of the third voltage conversion module is connected to the output end of the first MOS tube, and the output end of the third voltage conversion module is connected to the deployment device.

14. The power supply circuit according to claim 13, wherein: The power supply circuit also includes a seventh resistor and an eighth resistor, one end of the seventh resistor is connected to the input end of the third voltage conversion module, the other end of the seventh resistor is respectively connected to the enable pin of the third voltage conversion module and one end of the eighth resistor, and the other end of the eighth resistor is grounded.

15. The power supply circuit according to claim 1, wherein: The first MOS transistor is an N-type MOS transistor, and the second MOS transistor is a P-type MOS transistor.

16. The power supply circuit according to claim 1, characterized in that: The converting the third voltage into a fourth voltage to power the baseboard management controller includes: The third voltage is converted into a fourth voltage and input into a baseboard management controller to power the baseboard management controller, wherein the third voltage is 10V and the fourth voltage is 3.8V.

17. The power supply circuit according to claim 1, wherein: The gate voltage of the second MOS tube is zero, and the second MOS tube is turned on.

18. The power supply circuit according to claim 6, characterized in that: The disconnecting when detecting the sixth voltage output by the first voltage conversion module comprises: The gate of the second MOS transistor is disconnected when it detects that the sixth voltage output by the first voltage conversion module is a high level voltage.

19. The power supply circuit according to claim 12, wherein: The diode is used to absorb the reverse current generated at the interface module when the power is cut off.

20. The power supply circuit according to claim 1, wherein: The interface module is USB or Type C.

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