阅读说明：本技术 一种服务器及其防烧板电路和方法 (Server and board burning prevention circuit and method thereof ) 是由 郭伯亚 于 2021-07-29 设计创作，主要内容包括：本发明公开了一种服务器及其防烧板电路和方法。本申请可实时监测服务器内温度变化,并在温度过高时关闭电源保护系统,且本申请采用纯电路监测温度变化,可靠度较高且监测速度较快；另外,本申请将不同电源基于是否影响服务器正常运行进行区分,以决定是关闭局部电源还是服务器整体电源,从而尽可能延长服务器的工作时间,提升用户的使用体验。(The invention discloses a server and a board burning prevention circuit and method thereof. The temperature change in the server can be monitored in real time, the power supply protection system is turned off when the temperature is too high, and a pure circuit is adopted to monitor the temperature change, so that the reliability is high and the monitoring speed is high; in addition, this application distinguishes different power based on whether influence the server normal operating to decide whether to close local power or the whole power of server, thereby prolong the operating time of server as far as possible, promote user's use and experience.)

1. A burn-in prevention circuit for a server, comprising:

the temperature acquisition circuit is used for respectively acquiring temperature information of different positions on a circuit board in the server in real time;

the temperature comparison circuit is used for comparing the temperature information of the target position with a preset temperature threshold corresponding to the target position in real time, and if the temperature information is greater than the preset temperature threshold, generating an over-temperature signal; wherein the target position is any one of the positions;

the controller is used for dividing the power supplies corresponding to the different positions into a first power supply which does not influence the normal operation of the server and a second power supply which influences the normal operation of the server in advance; when the over-temperature signal of the target position is received, if a target power supply corresponding to the target position belongs to the first power supply, the target power supply is turned off; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

2. The burn-in prevention circuit for a server of claim 1, wherein the temperature acquisition circuit comprises a plurality of temperature acquisition sub-circuits for acquiring temperature information of different positions on the circuit board, each temperature acquisition sub-circuit comprising a thermistor and a fixed resistor; wherein:

the first end of the fixed resistor is connected with a preset direct current power supply, the second end of the fixed resistor is connected with the first end of the thermistor, the public end of the fixed resistor is used as the output end of the temperature acquisition sub-circuit, and the second end of the thermistor is grounded.

3. The burn-in prevention circuit for a server of claim 2, wherein the temperature comparison circuit comprises a plurality of voltage comparators; wherein:

when the thermistor is an NTC resistor, the input positive ends of the voltage comparators are all connected with a preset voltage threshold, the input negative ends of the voltage comparators are connected with the output ends of the temperature acquisition sub-circuits one by one, and the output ends of the voltage comparators are all connected with the controller;

when the thermistor is a PTC resistor, the input negative terminals of the voltage comparators are all connected to a preset voltage threshold, the input positive terminals of the voltage comparators are connected with the output terminals of the temperature acquisition sub-circuits one by one, and the output terminals of the voltage comparators are all connected with the controller.

4. The burn-in prevention circuit for a server according to claim 3, wherein the controller is specifically configured to turn off the target power supply if the target power supply belongs to the first power supply when receiving a high level signal output by the voltage comparator corresponding to the target position; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

5. The burn-in prevention circuit of a server of claim 1, wherein the temperature comparison circuit is further configured to generate a no over-temperature signal if the temperature information is not greater than the preset temperature threshold;

the controller is further configured to restart the target power supply if the non-over-temperature signal of the target location is received again after the target power supply is turned off.

6. The burn-in prevention circuit for a server of claim 1 wherein a power supply on said circuit board for powering said server hard disk is said first power supply and the remaining power supplies on said circuit board are said second power supply.

7. The server burn-in prevention circuit board of any one of claims 1-6, wherein the server burn-in prevention circuit board further comprises a delay circuit; wherein:

a plurality of input ends of the delay circuit are connected with a plurality of output ends of the temperature comparison circuit one by one, and a plurality of output ends of the delay circuit are connected with the controller;

the delay circuit is used for delaying a plurality of signals output by the temperature comparison circuit for a preset time and then transmitting the signals to the controller for processing; the preset time is equal to the time from the power-on of the burning-prevention board circuit to the stable work of the controller.

8. The burn-in prevention board circuit of a server of claim 7, wherein the burn-in prevention board circuit of a server further comprises a filter circuit; wherein:

a plurality of input ends of the filter circuit are connected with a plurality of output ends of the delay circuit one by one, and a plurality of output ends of the filter circuit are connected with the controller;

the filtering circuit is used for filtering the plurality of signals output by the delay circuit and transmitting the plurality of filtered signals to the controller for processing.

9. A burn-in prevention method for a server, which is applied to the burn-in prevention circuit for a server according to any one of claims 1 to 8, and which comprises:

dividing power supplies corresponding to different positions on a circuit board in a server into a first power supply which does not influence the normal operation of the server and a second power supply which influences the normal operation of the server in advance;

when an over-temperature signal of a target position is received, if a target power supply corresponding to the target position belongs to the first power supply, the target power supply is turned off; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

10. A server, comprising the server burn-in prevention board circuit according to any one of claims 1 to 8.

Technical Field

The invention relates to the field of server safety, in particular to a server and a circuit and a method for preventing a server from being burnt.

Background

The server is used as a basic device for bearing key services such as data operation, data storage, data processing and the like, and the safety of the server is particularly important. For the server, the most serious situation is that a board is burned, which means that a circuit board of the server is damaged destructively, and not only a single server is damaged and cannot be recovered, but also other cabinets and servers in a machine room are more likely to be subjected to risks. Therefore, in server design, burn-in prevention board design is a part of design that is quite important.

At present, a plurality of temperature sensors are mainly designed on a circuit board in a server to detect temperature information of each component in a system, and transmit the temperature information to a Baseboard Management Controller (BMC) through an I2C bus, so that the BMC can monitor and display the temperature information in the server, and send a command for turning off a system power supply to a Complex Programmable Logic Device (CPLD) when the temperature information is too high, so as to prevent a board burning condition caused by the too high temperature in the system.

However, the BMC is required to actively access the temperature sensors for transferring the temperature information, but actually due to BMC performance limitation and I2C bus limitation, the BMC does not access the temperature sensors in real time, but sets a polling time, and accesses the temperature sensors one by one in each polling time, however, most burn-in occurs very quickly, and if the temperature sensor is just in the polling time, the BMC cannot sense abnormal temperature information, so that effective protection cannot be achieved, and the security of the server is reduced.

Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a server and a board burning prevention circuit and a board burning prevention method thereof, which can monitor the temperature change in the server in real time and turn off a power protection system when the temperature is too high; in addition, this application distinguishes different power based on whether influence the server normal operating to decide whether to close local power or the whole power of server, thereby prolong the operating time of server as far as possible, promote user's use and experience.

In order to solve the above technical problem, the present invention provides a burn-in prevention circuit for a server, comprising:

the temperature acquisition circuit is used for respectively acquiring temperature information of different positions on a circuit board in the server in real time;

the temperature comparison circuit is used for comparing the temperature information of the target position with a preset temperature threshold corresponding to the target position in real time, and if the temperature information is greater than the preset temperature threshold, generating an over-temperature signal; wherein the target position is any one of the positions;

the controller is used for dividing the power supplies corresponding to the different positions into a first power supply which does not influence the normal operation of the server and a second power supply which influences the normal operation of the server in advance; when the over-temperature signal of the target position is received, if a target power supply corresponding to the target position belongs to the first power supply, the target power supply is turned off; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

Preferably, the temperature acquisition circuit comprises a plurality of temperature acquisition sub-circuits for acquiring temperature information of different positions on the circuit board one by one, and each temperature acquisition sub-circuit comprises a thermistor and a fixed resistor; wherein:

the first end of the fixed resistor is connected with a preset direct current power supply, the second end of the fixed resistor is connected with the first end of the thermistor, the public end of the fixed resistor is used as the output end of the temperature acquisition sub-circuit, and the second end of the thermistor is grounded.

Preferably, the temperature comparison circuit comprises a plurality of voltage comparators; wherein:

when the thermistor is an NTC resistor, the input positive ends of the voltage comparators are all connected with a preset voltage threshold, the input negative ends of the voltage comparators are connected with the output ends of the temperature acquisition sub-circuits one by one, and the output ends of the voltage comparators are all connected with the controller;

when the thermistor is a PTC resistor, the input negative terminals of the voltage comparators are all connected to a preset voltage threshold, the input positive terminals of the voltage comparators are connected with the output terminals of the temperature acquisition sub-circuits one by one, and the output terminals of the voltage comparators are all connected with the controller.

Preferably, the controller is specifically configured to, when receiving a high level signal output by the voltage comparator corresponding to the target position, turn off the target power supply if the target power supply belongs to the first power supply; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

Preferably, the temperature comparison circuit is further configured to generate a non-over-temperature signal if the temperature information is not greater than the preset temperature threshold;

the controller is further configured to restart the target power supply if the non-over-temperature signal of the target location is received again after the target power supply is turned off.

Preferably, a power supply on the circuit board for supplying power to the server hard disk is used as the first power supply, and the rest of the power supplies on the circuit board are used as the second power supply.

Preferably, the burn-in prevention circuit of the server further comprises a delay circuit; wherein:

a plurality of input ends of the delay circuit are connected with a plurality of output ends of the temperature comparison circuit one by one, and a plurality of output ends of the delay circuit are connected with the controller;

the delay circuit is used for delaying a plurality of signals output by the temperature comparison circuit for a preset time and then transmitting the signals to the controller for processing; the preset time is equal to the time from the power-on of the burning-prevention board circuit to the stable work of the controller.

Preferably, the burn-in prevention circuit of the server further comprises a filter circuit; wherein:

a plurality of input ends of the filter circuit are connected with a plurality of output ends of the delay circuit one by one, and a plurality of output ends of the filter circuit are connected with the controller;

the filtering circuit is used for filtering the plurality of signals output by the delay circuit and transmitting the plurality of filtered signals to the controller for processing.

In order to solve the above technical problem, the present invention further provides a method for preventing a server from being burned, which is applied to any one of the above anti-burning circuits of the server, and includes:

dividing power supplies corresponding to different positions on a circuit board in a server into a first power supply which does not influence the normal operation of the server and a second power supply which influences the normal operation of the server in advance;

when an over-temperature signal of a target position is received, if a target power supply corresponding to the target position belongs to the first power supply, the target power supply is turned off; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

In order to solve the technical problem, the invention also provides a server which comprises the burning-resistant board circuit of any one of the servers.

The invention provides a board burning prevention circuit of a server, which comprises a temperature acquisition circuit, a temperature comparison circuit and a controller. The temperature acquisition circuit is used for respectively acquiring temperature information of different positions on the circuit board in real time; the temperature comparison circuit is used for generating an over-temperature signal if the temperature information of the target position is greater than a preset temperature threshold corresponding to the target position; the controller is used for dividing power supplies corresponding to different positions into a first power supply which does not influence the normal operation of the server and a second power supply which influences the normal operation of the server in advance; when an over-temperature signal of a target position is received, if a target power supply corresponding to the target position belongs to a first power supply, the target power supply is turned off; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence. Therefore, the temperature change in the server can be monitored in real time, the power supply protection system is turned off when the temperature is too high, and the pure circuit is adopted to monitor the temperature change, so that the reliability is high and the monitoring speed is high; in addition, this application distinguishes different power based on whether influence the server normal operating to decide whether to close local power or the whole power of server, thereby prolong the operating time of server as far as possible, promote user's use and experience.

The invention also provides a server and a burning-resistant method thereof, which have the same beneficial effects as the burning-resistant circuit.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a burn-in prevention circuit of a server according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a burn-in prevention circuit of a server according to an embodiment of the present invention;

fig. 3 is a flowchart of a method for preventing a server from being burned in according to an embodiment of the present invention.

Detailed Description

The core of the invention is to provide a server and a circuit and a method for preventing the server from being burnt, which can monitor the temperature change in the server in real time and turn off a power protection system when the temperature is too high; in addition, this application distinguishes different power based on whether influence the server normal operating to decide whether to close local power or the whole power of server, thereby prolong the operating time of server as far as possible, promote user's use and experience.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a board burning prevention circuit of a server according to an embodiment of the present invention.

This board circuit that prevents burning of server includes:

the temperature acquisition circuit 1 is used for respectively acquiring temperature information of different positions on a circuit board in the server in real time;

the temperature comparison circuit 2 is used for comparing the temperature information of the target position with a preset temperature threshold corresponding to the target position in real time, and generating an over-temperature signal if the temperature information is greater than the preset temperature threshold; wherein the target position is any position;

the controller 3 is used for dividing power supplies corresponding to different positions into a first power supply which does not influence the normal operation of the server and a second power supply which influences the normal operation of the server in advance; when an over-temperature signal of a target position is received, if a target power supply corresponding to the target position belongs to a first power supply, the target power supply is turned off; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

Specifically, the board circuit that prevents burning of server of this application includes temperature acquisition circuit 1, temperature comparison circuit 2 and controller 3, and its theory of operation is:

the temperature acquisition circuit 1 respectively acquires temperature information of different positions on a circuit board (such as a mainboard, a power board and a fan board) in the server in real time, and actively transmits the temperature information of different positions on the circuit board to the temperature comparison circuit 2. For temperature information of any position (referred to as a target position) on the circuit board, the temperature comparison circuit 2 performs the following operations: the temperature comparison circuit 2 compares the temperature information of the target position with a preset temperature threshold corresponding to the target position in real time, generates an over-temperature signal of the target position if the temperature information of the target position is greater than the preset temperature threshold corresponding to the target position, and actively sends the over-temperature signal of the target position to the controller 3.

The controller 3 divides power supplies corresponding to different positions on the circuit board in the server into two power supplies in advance: one is a power supply that does not affect the normal operation of the server (referred to as a first power supply) and the other is a power supply that does affect the normal operation of the server (referred to as a second power supply). When the controller 3 receives the over-temperature signal of the target position, if the power supply corresponding to the target position (called as the target power supply) belongs to the first power supply, which indicates that the normal operation of the server is not affected by the turning-off of the target power supply, only the target power supply is turned off (local power supply is turned off); and if the target power supply belongs to the second power supply, which indicates that the normal operation of the server is influenced by the turning-off of the target power supply, gradually turning off the power supply of the server according to a preset turning-off time sequence (turning-off of the whole power supply of the server).

Therefore, the temperature change in the server can be monitored in real time, the power supply protection system is turned off when the temperature is too high, and the pure circuit is adopted to monitor the temperature change, so that the reliability is high and the monitoring speed is high; in addition, this application distinguishes different power based on whether influence the server normal operating to decide whether to close local power or the whole power of server, thereby prolong the operating time of server as far as possible, promote user's use and experience.

On the basis of the above-described embodiment:

referring to fig. 2, fig. 2 is a schematic diagram of a specific structure of a server burn-proof circuit according to an embodiment of the present invention (the number of components in the diagram is only one embodiment, and the number of components actually installed in the circuit cannot be limited).

As an alternative embodiment, the temperature acquisition circuit 1 includes a plurality of temperature acquisition sub-circuits for acquiring temperature information of different positions on the circuit board one by one, and each temperature acquisition sub-circuit includes a thermistor R1 and a fixed resistor R2; wherein:

the first end of the fixed resistor R2 is connected with a preset direct current power supply, the second end of the fixed resistor R2 is connected with the first end of the thermistor R1, the common end of the fixed resistor R2 is used as the output end of the temperature acquisition sub-circuit, and the second end of the thermistor R1 is grounded.

Specifically, the temperature acquisition circuit 1 of the present application includes a plurality of temperature acquisition sub-circuits, each temperature acquisition sub-circuit includes a thermistor R1 and a fixed resistor R2, and its operating principle is:

the plurality of thermistors R1 may be disposed at different positions on the circuit board (where a position where board burning is likely to occur is selected, such as a backplane power connector, a fan power connector, a GPU (graphics processing unit) card slot (slot) on the motherboard or the power board, or a position where main power consumption is output such as a fan board, and the thermistors R1 are disposed at positions as close as possible to each other). The thermistor R1 is used to detect the temperature information of its own location, and convert the detected temperature information into a voltage signal for processing by the temperature comparison circuit 2.

For example, when the thermistor R1 is an NTC (Negative Temperature Coefficient resistor), if the Temperature of the NTC resistor increases, the resistance of the NTC resistor decreases, and the voltage across the NTC resistor decreases, that is, the voltage output by the Temperature acquisition sub-circuit in which the thermistor R1 is located decreases.

When the thermistor R1 is a PTC (Positive Temperature Coefficient resistor), if the Temperature at the position of the PTC resistor increases, the resistance of the PTC resistor increases, and the voltage at the two ends of the PTC resistor increases, that is, the voltage output by the Temperature acquisition sub-circuit at the position of the thermistor R1 increases.

As an alternative embodiment, the temperature comparison circuit 2 includes a plurality of voltage comparators D; wherein:

when the thermistor R1 is an NTC resistor, the input positive terminals of the voltage comparators D are all connected to a preset voltage threshold, the input negative terminals of the voltage comparators D are connected to the output terminals of the temperature acquisition sub-circuits one by one, and the output terminals of the voltage comparators D are all connected to the controller 3;

when the thermistor R1 is a PTC resistor, the input negative terminals of the voltage comparators D are all connected to the preset voltage threshold, the input positive terminals of the voltage comparators D are connected to the output terminals of the temperature acquisition sub-circuits one by one, and the output terminals of the voltage comparators D are all connected to the controller 3.

Specifically, the temperature comparison circuit 2 of the present application includes a plurality of voltage comparators D, and the operating principle thereof is as follows (taking the first thermistor, the first voltage comparator connected to the first thermistor as an example):

when the first thermistor is an NTC resistor, if the temperature of the position where the first thermistor is located is increased, the resistance value of the first thermistor is reduced, the voltage at two ends of the first thermistor is reduced, and when the voltage at two ends of the first thermistor is reduced to be smaller than a preset voltage threshold value, the first voltage comparator outputs a high level signal (1, which represents over-temperature); otherwise, the first voltage comparator outputs a low level signal (0, indicating no over-temperature).

When the first thermistor is a PTC (positive temperature coefficient) resistor, if the temperature of the position where the first thermistor is located rises, the resistance value of the first thermistor is increased, the voltage at two ends of the first thermistor is increased, and when the voltage at two ends of the first thermistor rises to be larger than a preset voltage threshold value, the first voltage comparator outputs a high level signal (1, which represents over-temperature); otherwise, the first voltage comparator outputs a low level signal (0, indicating no over-temperature).

As an alternative embodiment, the controller 3 is specifically configured to, when receiving a high level signal output by the voltage comparator D corresponding to the target position, turn off the target power supply if the target power supply belongs to the first power supply; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

Specifically, when receiving a high level signal output by a voltage comparator D corresponding to a target position, the controller 3 of the present application determines that the target position is over-temperature, and then enters a power off operation (if the target power belongs to a first power, the target power is turned off, and if the target power belongs to a second power, the power of the server is turned off step by step according to a preset power off timing sequence); and when a low level signal output by the voltage comparator D corresponding to the target position is received, if the target position is not over-temperature, the power supply is not turned off.

As an alternative embodiment, the temperature comparison circuit 2 is further configured to generate a non-over-temperature signal if the temperature information is not greater than the preset temperature threshold;

the controller 3 is further configured to restart the target power supply if the non-over-temperature signal of the target location is received again after the target power supply is turned off.

Further, the temperature comparison circuit 2 generates a non-over-temperature signal when the temperature information of the target position is not greater than the preset temperature threshold corresponding to the target position (the above embodiments have been mentioned, and no further description is given herein). Based on this, after the target power supply is turned off, if the controller 3 receives the non-over-temperature signal of the target position again, which indicates that the temperature of the target position is recovered to be normal, the target power supply is restarted.

As an alternative embodiment, the power supply on the circuit board for supplying power to the server hard disk is used as the first power supply, and the rest of the power supplies on the circuit board are used as the second power supply.

Specifically, the power supplies corresponding to different positions on the circuit board are divided into a first power supply and a second power supply, wherein the first power supply does not influence the normal operation of the server, and the second power supply influences the normal operation of the server.

As an optional embodiment, the burn-proof board circuit of the server further includes a delay circuit 4; wherein:

a plurality of input ends of the delay circuit 4 are connected with a plurality of output ends of the temperature comparison circuit 2 one by one, and a plurality of output ends of the delay circuit 4 are connected with the controller 3;

the delay circuit 4 is used for delaying a plurality of signals output by the temperature comparison circuit 2 for a preset time and then transmitting the signals to the controller 3 for processing; wherein the preset time is equal to the time from the power-on of the burn-proof board circuit to the stable operation of the controller 3.

Further, the board circuit is prevented burning by server of this application still includes delay circuit 4, and its theory of operation is:

when the burning-proof board circuit is electrified, the temperature acquisition circuit 1, the temperature comparison circuit 2 and the controller 3 are all electrified to work. Considering that the controller 3 is not stable in the initial power-on period, if the controller 3 processes the signal output by the temperature comparison circuit 2 at this time, an over-temperature misjudgment may occur, so the present application adds the delay circuit 4 between the temperature comparison circuit 2 and the controller 3, and functions as: when the burn-proof board circuit is powered on, the delay circuit 4 delays a plurality of signals output by the temperature comparison circuit 2 for preset time and then transmits the signals to the controller 3 for processing, and the signals output by the temperature comparison circuit 2 are just delayed until the controller 3 works stably and then are transmitted to the controller 3, so that the phenomenon that the controller 3 is unstable to cause over-temperature misjudgment is avoided.

As an alternative embodiment, the burn-proof board circuit of the server further includes a filter circuit 5; wherein:

a plurality of input ends of the filter circuit 5 are connected with a plurality of output ends of the delay circuit 4 one by one, and a plurality of output ends of the filter circuit 5 are connected with the controller 3;

the filter circuit 5 is configured to perform filtering processing on the multiple signals output by the delay circuit 4, and transmit the multiple filtered signals to the controller 3 for processing.

Further, the board circuit is prevented burning by server of this application still includes filter circuit 5, and its theory of operation is:

considering that the signal output by the temperature comparison circuit 2 may be doped with an interference signal to cause the controller 3 to have an over-temperature misjudgment, the application further adds the filter circuit 5 between the delay circuit 4 and the controller 3, and has the following functions: the filter circuit 5 performs filtering processing on a plurality of signals output by the delay circuit 4 (i.e., a plurality of signals output by the temperature comparison circuit 2), and transmits the plurality of filtered signals to the controller 3 for processing, so as to avoid over-temperature misjudgment caused by doping interference signals in the signals output by the temperature comparison circuit 2.

It should be noted that the functions of the controller 3, the delay circuit 4, and the filter circuit 5 in the present application can all be implemented by using the original CPLD in the server.

Referring to fig. 3, fig. 3 is a flowchart of a method for preventing a server from being burned in according to an embodiment of the present invention.

The burning-resistant board method of the server is applied to any one of the burning-resistant board circuits of the server, and comprises the following steps:

step S1: the power supplies corresponding to different positions on the circuit board in the server are divided into a first power supply which does not influence the normal operation of the server and a second power supply which influences the normal operation of the server in advance.

Step S2: when an over-temperature signal of a target position is received, if a target power supply corresponding to the target position belongs to a first power supply, the target power supply is turned off; and if the target power supply belongs to the second power supply, gradually closing the power supply of the server according to a preset shutdown time sequence.

For the introduction of the burn-in prevention circuit provided in the present application, reference is made to the above-mentioned embodiment of the burn-in prevention circuit, which is not described herein again.

The application also provides a server, which comprises the burning-resistant board circuit of any one of the servers.

For the introduction of the server provided in the present application, please refer to the embodiment of the above burning-prevention circuit, which is not described herein again.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.