CN115728665A - A power failure detection circuit, method and system - Google Patents

Abstract

The invention discloses a power failure detection circuit, method and system. The power failure detection circuit includes a complex programmable logic device, a power supply chip, a substrate management controller, a detection module, and a storage chip. The first output terminal is connected to the input terminal of the complex programmable logic device, the first output terminal of the complex programmable logic device is connected to the input terminal of the baseboard management controller through the I2C bus, and the baseboard management controller The output end of the described memory chip is connected to the first input end of the memory chip; the second output end of the complex programmable logic device is connected to the first input end of the detection module, and the second output end of the power supply chip is connected to the The second input end of the detection module, and the output end of the detection module are connected to the second input end of the memory chip. The technical solution of the invention can not only detect power failure, but also detect the cause of power failure.

Description

A power failure detection circuit, method and system

technical field

The invention belongs to the field of electronic technology, and in particular relates to a power failure detection circuit, method and system.

Background technique

At present, during the use of the server, due to some reasons, the power supply of the motherboard and other boards may be unexpectedly powered off, and when the board is powered off, it is difficult to save the fault information in real time.

In addition, it is also difficult to know what causes the board to lose power. The current power chip protection is relatively sufficient, and there are many types of protection, but the chip does not output its own fault information independently, so a monitoring system is needed at this time to monitor the fault information and output error logs to facilitate diagnosis. Specific failure.

Most servers now use complex programmable logic devices (CPLD) to monitor the power signal of the power chip (PWRGD signal, used to indicate the power supply status of the power supply) to determine whether the power chip is faulty, and then through the baseboard management controller (BMC) To read the information in the CPLD to output the error log to realize the diagnosis of the server failure. Although this method of monitoring the PWRGD signal can determine which power chip is faulty, the cause of the power fault is unknown.

There are many types of protection for the power chip, such as over-current protection, short-circuit protection, over-temperature protection, under-voltage protection, over-voltage protection, etc. However, setting the PWRGD signal low can only indicate that the power supply has no output. Therefore, the limitation is very strong, and if the entire board is powered off, there will be no chance to read the information of the BMC, and the information will be directly erased due to the power failure.

Contents of the invention

In order to solve the problems of the prior art, the present invention provides a power failure detection circuit, method and system, the power failure detection circuit includes a complex programmable logic device, a power supply chip, a substrate management controller, a detection module, a storage chip, The storage chip includes a register, the first output end of the power supply chip is connected to the input end of the complex programmable logic device, and the first output end of the complex programmable logic device communicates with the base board management control through an I2C bus connected to the input terminal of the device, the output terminal of the baseboard management controller is connected to the first input terminal of the memory chip; the second output terminal of the complex programmable logic device is connected to the first input terminal of the detection module The second output terminal of the power supply chip is connected to the second input terminal of the detection module, and the output terminal of the detection module is connected to the second input terminal of the memory chip. The technical solution of the invention can not only detect power failure, but also detect the cause of power failure.

Described technical scheme is as follows:

In the first aspect, a power failure detection circuit, the power failure detection circuit includes a complex programmable logic device, a power chip, a baseboard management controller, a detection module, and a storage chip, and the storage chip includes a register,

The first output terminal of the power chip is connected to the input terminal of the complex programmable logic device, and the first output terminal of the complex programmable logic device is connected to the input terminal of the baseboard management controller through the I2C bus, so The output end of the baseboard management controller is connected to the first input end of the memory chip;

The second output end of the complex programmable logic device is connected to the first input end of the detection module, the second output end of the power supply chip is connected to the second input end of the detection module, and the detection module The output terminal is connected to the second input terminal of the memory chip;

The detection module is used to convert the result of power failure detection information into binary information, and store the binary information in the register; the baseboard management controller is used to obtain the power failure detection information of the register, and output an error log.

In some embodiments, the power failure detection circuit includes a capacitor module,

The output terminal of the capacitor module is connected to the third input terminal of the memory chip;

The capacitor module is used for the backup power supply of the memory chip.

In some embodiments, the power failure detection further includes a hard disk,

The output terminal of the memory chip is connected to the input terminal of the hard disk;

The hard disk is used for backing up information stored in the memory chip.

In some embodiments, the power failure detection circuit further includes a load module,

The second output terminal of the power chip is connected to the input terminal of the load module at the same time.

In the second aspect, the present invention also provides a power failure detection method, the method comprising:

Obtain the power supply number signal of the power supply chip through the complex programmable logic device;

confirming that the detection module is turned on according to the power signal of the power chip;

The cause of the failure of the power supply chip is detected by the detection module.

In some embodiments, the confirmation of starting the detection module according to the power signal signal of the power chip includes:

judging whether the power chip is faulty according to the power signal of the power chip;

If so, the baseboard management controller sends an alarm message to the complex programmable logic device according to the received error information that the power chip is faulty, and the complex programmable logic device turns on the detection module according to the alarm signal; if If not, the power signal of the power chip is obtained again through the complex programmable logic device.

In some embodiments, the detection of the cause of the failure of the power supply chip through the detection module includes:

The detection module sequentially detects the type of circuit protection involved in the failure of the power chip;

Judging whether to detect the type of circuit protection that causes the power chip to fail and cause problems;

If so, then convert the power failure detection information result into corresponding binary information according to the detected circuit protection type of the problem, and store the binary information in the register of the memory chip; The type of circuit protection involved in the failure of the power chip is detected.

In some embodiments, after the detection module detects the cause of the failure of the power supply chip, it includes:

The capacitor module is used as a backup power supply, and the binary information corresponding to the power failure detection information result received by the register is backed up to the hard disk.

In some embodiments, after detecting the cause of the failure of the power supply chip through the detection module, it further includes:

The baseboard management controller acquires binary information corresponding to the power failure detection information result stored in the register, and outputs an error log according to the binary information corresponding to the power failure detection information result.

In a third aspect, the present invention also provides a power failure detection system, said system comprising the power failure detection circuit according to any one of the first aspect.

The beneficial effects brought by the technical solutions disclosed in the embodiments of the present invention are:

The invention discloses a power failure detection circuit, method and system. The power failure detection circuit includes a complex programmable logic device, a power chip, a substrate management controller, a detection module, and a storage chip. The storage chip includes a register. The first output terminal of the power chip is connected to the input terminal of the complex programmable logic device, and the first output terminal of the complex programmable logic device is connected to the input terminal of the baseboard management controller through the I2C bus, and the The output terminal of the baseboard management controller is connected to the first input terminal of the storage chip; the second output terminal of the complex programmable logic device is connected to the first input terminal of the detection module, and the second output terminal of the power chip The output terminal is connected to the second input terminal of the detection module, and the output terminal of the detection module is connected to the second input terminal of the memory chip. The technical solution of the invention can not only detect power failure, but also detect the cause of power failure.

The technical solution design disclosed in the embodiment of the present invention can be used to monitor the system for the fault of the power chip on the board, which kind of fault occurs in the power chip can be specifically identified, and the error log can be recorded through the BMC, and the specific fault can be determined by accessing the error log. reason.

The technical solution disclosed in the embodiment of the present invention can write the binary fault information of the memory chip register into the hard disk through the supercapacitor module when the 12V power failure of the board occurs, so as to prevent the loss of the fault information.

The technical solution disclosed in the embodiment of the present invention detects the specific failure cause of the power supply VR (Voltage Regulation) chip, which facilitates later maintenance and debugging work, and at the same time diagnoses specific problems of the board; using BMC to realize this function can intuitively output errors The log is convenient for maintenance personnel to deal with and solve problems; the fault information is backed up by using the super capacitor circuit to prevent the loss of monitoring fault data after the entire board is powered off.

Description of drawings

The above-mentioned features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.

Fig. 1 shows the structural diagram of the power failure detection circuit of the present invention;

Fig. 2 shows the flowchart of the power failure detection method of the present invention;

Fig. 3 shows the register numerical chart of the overtemperature protection problem of the present invention;

Fig. 4 shows the specific flowchart of the power failure detection method of the present invention;

Fig. 5 shows a structural diagram of the power failure detection device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Some, but not all, embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. In the description of the present invention, "plurality" or "several" means two or more, unless otherwise specifically defined.

Embodiment one

An embodiment of the present invention provides a power failure detection circuit. As shown in FIG. 1, the power failure detection circuit includes a complex programmable logic device, a power supply chip, a substrate management controller, a detection module, and a storage chip. including registers,

The first output terminal of the power chip is connected to the input terminal of the complex programmable logic device, and the first output terminal of the complex programmable logic device is connected to the input terminal of the baseboard management controller through the I2C bus, so The output end of the baseboard management controller is connected to the first input end of the memory chip;

The second output end of the complex programmable logic device is connected to the first input end of the detection module, the second output end of the power supply chip is connected to the second input end of the detection module, and the detection module The output terminal is connected to the second input terminal of the memory chip;

The detection module is used to convert the result of power failure detection information into binary information, and store the binary information in the register; the baseboard management controller is used to obtain the power failure detection information of the register, and output an error log.

Specifically, the technical solution of the present invention adds a detection circuit between the power supply chip and the load module to realize real-time monitoring of various power supply protection statuses, and input the monitored results into the registers of the memory chip, and the substrate management control The device reads the power failure detection data in the register through I2C communication, and outputs an error log according to the reading of the power failure detection data.

The detection module is used to write the power failure detection information into a set of six-digit binary numbers, and then write the binary numbers into the memory chip, because the binary numbers corresponding to the power failure detection data will be erased due to power failure, Therefore, it is necessary to use a supercapacitor, that is, a capacitor module, as a backup power supply to back up the power failure detection data stored in the memory chip to the hard disk to prevent data loss.

In this embodiment, the power failure detection circuit includes a capacitor module,

The output terminal of the capacitor module is connected to the third input terminal of the memory chip;

The capacitor module is used for the backup power supply of the memory chip.

In this embodiment, the power failure detection further includes a hard disk,

The output terminal of the memory chip is connected to the input terminal of the hard disk;

The hard disk is used for backing up information stored in the memory chip.

In this embodiment, the power failure detection circuit further includes a load module,

The second output terminal of the power chip is connected to the input terminal of the load module at the same time.

Specifically, the load module includes power-consuming devices at the back end of the server, such as a CPU and the like.

The beneficial effects brought by the technical solutions disclosed in the embodiments of the present invention are:

The power failure detection circuit includes a complex programmable logic device, a power chip, a baseboard management controller, a detection module, and a storage chip, the storage chip includes a register, and the first output terminal of the power chip is connected to the complex programmable The input terminal of the logic device, the first output terminal of the complex programmable logic device is connected to the input terminal of the baseboard management controller through the I2C bus, and the output terminal of the baseboard management controller is connected to the first output terminal of the storage chip. The input terminal is connected; the second output terminal of the complex programmable logic device is connected to the first input terminal of the detection module, and the second output terminal of the power chip is connected to the second input terminal of the detection module, so The output end of the detection module is connected to the second input end of the memory chip. The technical solution of the invention can not only detect power failure, but also detect the cause of power failure.

The technical solution design disclosed in the embodiment of the present invention can be used to monitor the system for the fault of the power chip on the board, which kind of fault occurs in the power chip can be specifically identified, and the error log can be recorded through the BMC, and the specific fault can be determined by accessing the error log. reason.

Embodiment two

The present invention provides a power failure detection method, as shown in Figure 2, the method includes:

Step S1, acquiring the power signal of the power chip through the complex programmable logic device.

Specifically, the PWRGD signal of the power chip is obtained through the complex programmable logic device,

Wherein, the PWRGD signal is used to indicate the power supply state of the power supply.

Step S2, confirming that the detection module is turned on according to the power signal signal of the power chip.

Specifically, the complex programmable logic device CPLD detects the PWRGD signal of the power chip on the board, and the baseboard management controller BMC communicates with the complex programmable logic device CPLD to read the status of the PWRGD signal and report The programmable logic device CPLD issues instructions, and the CPLD can control the opening and closing of the detection module according to the instructions.

Step S2 also includes:

Step S21, judging whether the power chip is faulty according to the power signal of the power chip;

If so, the baseboard management controller sends an alarm message to the complex programmable logic device according to the received error information that the power chip is faulty, and the complex programmable logic device turns on the detection module according to the alarm signal; if If not, the power signal of the power chip is obtained again through the complex programmable logic device.

Specifically, judge whether the power signal PWRGD signal of the power chip is low level according to the power signal signal of the power chip, that is, whether the power chip fails;

If so, the baseboard management controller sends an alarm Alert message to the complex programmable logic device according to the received error information that the power supply chip is faulty, and the complex programmable logic device turns on the detection module according to the alarm signal; If not, the power supply number signal of the power supply chip is obtained again through the complex programmable logic device.

Step S3, detecting the cause of the failure of the power supply chip through the detection module.

Step S3 also includes:

Step S31, the detection module sequentially detects the type of circuit protection involved in the failure of the power chip;

Judging whether to detect the type of circuit protection that causes the power chip to fail and cause problems;

If so, then convert the power failure detection information result into corresponding binary information according to the detected circuit protection type of the problem, and store the binary information in the register of the memory chip; The type of circuit protection involved in the failure of the power chip is detected.

Specifically, the detection module forms a group of six-digit binary numbers into the power failure detection result information, and writes the binary numbers into the memory chip.

Here, the power failure detection circuit monitors the types of over-current protection, short-circuit protection, over-temperature protection, over-voltage protection, and under-voltage protection. The above six types correspond to each other; '0' means that the protection has not occurred, and '1' means that the protection has occurred.

Wherein, when a problem occurs in the overcurrent protection, the current of the electrical device is large; when a problem occurs in the short circuit protection, a short circuit occurs in the electrical device; The temperature is high; when there is a problem with the undervoltage protection, the output voltage of the electrical device decreases; when there is a problem with the overvoltage protection, the output voltage of the electrical device increases.

As shown in Figure 3, there is a register value diagram of a problem with the over-temperature protection. When there is a problem with the over-temperature protection, the register outputs a value. At this time, the over-temperature protection of the power supply is repaired and key detected through the error log output by the BMC.

Step S4, using the capacitor module as a backup power supply, and backing up the binary information corresponding to the power failure detection information result received by the register to the hard disk.

Specifically, the memory chip feeds back the power failure detection result to the BMC, and uses the supercapacitor as a backup power supply and a hard disk to back up the information of the memory chip.

Step S5, the baseboard management controller acquires binary information corresponding to the power failure detection information result stored in the register, and outputs an error log according to the binary information corresponding to the power failure detection information result.

Fig. 4 is the specific flow chart of described power supply fault detection method, and the present invention is after the complex programmable logic device CPLD monitors that PWRGD signal is low level, by I2C communication, the error message that the power supply number signal is low level is sent to BMC, BMC return command to let CPLD start the detection module, the detection module will sequentially detect over-current protection, short-circuit protection, over-temperature protection, over-voltage protection, under-voltage protection; Type, when the system is interrupted, output the detection result of the detected power failure. When none of the previous five protection types are detected, that is, there is no problem with the first five protection types, the system will output other protection results at this time.

Here, in order to prevent the baseboard management controller BMC from losing power, the system uses a supercapacitor module as a backup power supply to back up the power failure detection results received by the registers of the memory chip to the hard disk.

When the BMC is working normally, the detection result of the register can be read through the BMC. After the BMC is powered off, the cause of the power failure can also be judged through the backup detection result in the hard disk.

The technical scheme of the present invention is that when the power chip fails, the fault cause of the power chip is diagnosed by the power fault detection method, and the error log of the fault is output through the BMC, and the supercapacitor is used as a backup power source to realize the power supply on the storage chip. The fault detection information is backed up to prevent accidental loss of power fault detection information.

The power failure detection method provided by the embodiment of the present invention can be improved and optimized without departing from the technical solution of the present invention, and these improvements and optimizations should also be regarded as the protection scope of the present invention.

Finally, there are many protection types that can be triggered by the power chip. This technical solution can also add detection of more protection types to improve the reliability of the detection. The present invention is based on the diagnosis of the protection type of the power chip protection. VR damage can detect the cause of a specific power failure.

The beneficial effects brought by the technical solutions disclosed in the embodiments of the present invention are:

The technical solution disclosed in the embodiment of the present invention can write the binary fault information of the memory chip register into the hard disk through the supercapacitor module when the 12V power failure of the board occurs, so as to prevent the loss of the fault information.

The technical solution disclosed in the embodiment of the present invention detects the specific failure cause of the power supply VR (Voltage Regulation) chip, which facilitates later maintenance and debugging work, and at the same time diagnoses specific problems of the board; using BMC to realize this function can intuitively output errors The log is convenient for maintenance personnel to deal with and solve problems; the fault information is backed up by using the super capacitor circuit to prevent the loss of monitoring fault data after the entire board is powered off.

Embodiment Three

The present invention provides a computer device, including a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the computer program, it can perform the following power failure detection method:

Obtain the power supply number signal of the power supply chip through the complex programmable logic device;

confirming that the detection module is turned on according to the power signal of the power chip;

The cause of the failure of the power supply chip is detected by the detection module.

The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

The technical solution disclosed in the embodiment of the present invention detects the specific failure cause of the power supply VR (Voltage Regulation) chip, which facilitates later maintenance and debugging work, and at the same time diagnoses specific problems of the board; using BMC to realize this function can intuitively output errors The log is convenient for maintenance personnel to deal with and solve problems; the fault information is backed up by using the super capacitor circuit to prevent the loss of monitoring fault data after the entire board is powered off.

Embodiment four

The present invention provides a power failure detection device. As shown in FIG. 5 , the device includes an acquisition module, a processing module, a detection module, and a post-processing module.

In this embodiment, the acquiring module is configured to acquire the power signal signal of the power chip through the complex programmable logic device;

A processing module, configured to confirm that the detection module is turned on according to the power signal of the power chip;

The detection module is used to detect the cause of the failure of the power supply chip through the detection module.

In this embodiment, the processing module is configured to judge whether the power chip is faulty according to the power signal signal of the power chip;

If so, the baseboard management controller sends an alarm message to the complex programmable logic device according to the received error information that the power chip is faulty, and the complex programmable logic device turns on the detection module according to the alarm signal; if If not, the power signal of the power chip is obtained again through the complex programmable logic device.

In this embodiment, the detection module is also used to sequentially detect the type of circuit protection involved in the failure of the power supply chip;

Judging whether to detect the type of circuit protection that causes the power chip to fail and cause problems;

If so, then convert the power failure detection information result into corresponding binary information according to the detected circuit protection type of the problem, and store the binary information in the register of the memory chip; The type of circuit protection involved in the failure of the power chip is detected.

In this embodiment, the post-processing module is configured to use the capacitor module as a backup power supply, and back up the binary information corresponding to the power failure detection information result received by the register to the hard disk.

In this embodiment, the post-processing module is used for the baseboard management controller to obtain binary information corresponding to the power failure detection information result stored in the register, and to output an error log according to the binary information corresponding to the power failure detection information result.

The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

The technical solution design disclosed in the embodiment of the present invention can be used to monitor the system for the fault of the power chip on the board, which kind of fault occurs in the power chip can be specifically identified, and the error log can be recorded through the BMC, and the specific fault can be determined by accessing the error log. reason.

The technical solution disclosed in the embodiment of the present invention can write the binary fault information of the memory chip register into the hard disk through the supercapacitor module when the 12V power failure of the board occurs, so as to prevent the loss of the fault information.

Embodiment five

The present invention provides a power failure detection system. The power failure detection system includes a power failure detection circuit. The power failure detection circuit includes a complex programmable logic device, a power chip, a substrate management controller, a detection module, and a storage chip. The memory chip includes registers,

The first output terminal of the power chip is connected to the input terminal of the complex programmable logic device, and the first output terminal of the complex programmable logic device is connected to the input terminal of the baseboard management controller through the I2C bus, so The output end of the baseboard management controller is connected to the first input end of the memory chip;

The second output end of the complex programmable logic device is connected to the first input end of the detection module, the second output end of the power supply chip is connected to the second input end of the detection module, and the detection module The output terminal is connected to the second input terminal of the memory chip;

The detection module is used to convert the result of power failure detection information into binary information, and store the binary information in the register; the baseboard management controller is used to obtain the power failure detection information of the register, and output an error log.

In some embodiments, the power failure detection circuit includes a capacitor module,

The output terminal of the capacitor module is connected to the third input terminal of the memory chip;

The capacitor module is used for the backup power supply of the memory chip.

In some embodiments, the power failure detection further includes a hard disk,

The output terminal of the memory chip is connected to the input terminal of the hard disk;

The hard disk is used for backing up information stored in the memory chip.

In some embodiments, the power failure detection circuit further includes a load module,

The second output terminal of the power chip is connected to the input terminal of the load module at the same time.

The technical solution design disclosed in the embodiment of the present invention can be used to monitor the system for the fault of the power chip on the board, which kind of fault occurs in the power chip can be specifically identified, and the error log can be recorded through the BMC, and the specific fault can be determined by accessing the error log. reason.

The technical solution disclosed in the embodiment of the present invention can write the binary fault information of the memory chip register into the hard disk through the supercapacitor module when the 12V power failure of the board occurs, so as to prevent the loss of the fault information.

All the above optional technical solutions can be combined in any way to form an optional embodiment of the present invention, which will not be repeated here.

Although the preferred embodiments of the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once the basic inventive concept is understood. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the application.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Claims (10)

1. The power failure detection circuit is characterized by comprising a complex programmable logic device, a power chip, a substrate management controller, a detection module and a storage chip, wherein the storage chip comprises a register,

the first output end of the power supply chip is connected to the input end of the complex programmable logic device, the first output end of the complex programmable logic device is connected with the input end of the substrate management controller through an I2C bus, and the output end of the substrate management controller is connected with the first input end of the storage chip;

a second output end of the complex programmable logic device is connected to a first input end of the detection module, a second output end of the power supply chip is connected to a second input end of the detection module, and an output end of the detection module is connected to a second input end of the storage chip;

the detection module is used for converting a power failure detection information result into binary information and storing the binary information in the register; and the substrate management controller is used for acquiring the power failure detection information of the register and outputting an error log.

2. The power failure detection circuit of claim 1, wherein the power failure detection circuit comprises a capacitive module,

the output end of the capacitor module is connected to the third input end of the memory chip;

the capacitor module is used for a standby power supply of the memory chip.

3. The power failure detection circuit of claim 1, wherein the power failure detection further comprises a hard disk,

the output end of the storage chip is connected to the input end of the hard disk;

the hard disk is used for backing up information stored by the storage chip.

4. The power failure detection circuit of claim 1, further comprising a load module,

and the second output end of the power supply chip is simultaneously connected to the input end of the load module.

5. A power failure detection method applied to a power failure detection circuit according to any one of claims 1 to 4, the method comprising:

acquiring a power supply number signal of the power supply chip through the complex programmable logic device;

confirming to start the detection module according to the power supply number signal of the power supply chip;

and detecting the reason of the power supply chip failure through the detection module.

6. The method according to claim 5, wherein the step of confirming the activation of the detection module according to the power supply number signal of the power supply chip comprises:

judging whether the power supply chip has a fault according to the power supply signal of the power supply chip;

if so, the substrate management controller sends alarm information to the complex programmable logic device according to the received error information that the power supply chip fails, and the complex programmable logic device starts a detection module according to the alarm signal; and if not, acquiring the power supply number signal of the power supply chip again through the complex programmable logic device.

7. The method according to claim 5, wherein the detecting, by the detecting module, the cause of the power chip failure comprises:

the detection module detects the circuit protection types related to the power chip faults in sequence;

judging whether a circuit protection type causing a problem due to the fault of the power supply chip is detected;

if yes, converting the power failure detection information result into corresponding binary information according to the detected circuit protection type with problems, and storing the binary information into a register of the storage chip; if not, the types of the circuit protection related to the power supply chip failure are continuously and sequentially detected.

8. The method according to claim 5, wherein after the detecting the cause of the power chip failure by the detecting module, the method comprises:

and taking the capacitor module as a standby power supply, and backing up binary information corresponding to the power failure detection information result received by the register to the hard disk.

9. The method according to claim 5, wherein after the detecting the cause of the power chip failure by the detecting module, the method further comprises:

and the baseboard management controller acquires binary information corresponding to the power failure detection information result stored in the register and outputs an error log according to the binary information corresponding to the power failure detection information result.

10. A power failure detection system, characterized in that the system comprises a power failure detection circuit according to any of claims 1-4.

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