CN211427303U - PCB protection system and server system - Google Patents

PCB protection system and server system Download PDF

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CN211427303U
CN211427303U CN201921914850.7U CN201921914850U CN211427303U CN 211427303 U CN211427303 U CN 211427303U CN 201921914850 U CN201921914850 U CN 201921914850U CN 211427303 U CN211427303 U CN 211427303U
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pcb
temperature
module
protection system
power supply
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张锋
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Suzhou Inspur Intelligent Technology Co Ltd
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Suzhou Inspur Intelligent Technology Co Ltd
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Abstract

本申请公开了一种PCB的保护系统,包括:设于PCB表层、用于采集PCB温度的温度采集模块;与温度采集模块连接、用于当PCB温度大于预设温度值生成控制信号的控制模块;与控制模块连接、用于在接收到控制信号停止为PCB供电的外部供电模块。本申请通过温度采集模块监控PCB温度,当PCB温度过高时,通过控制模块生成控制信号控制外部供电模块停止为PCB供电,断开大电流通过PCB的通道,从而避免了由于PCB不断处于短路发热状态带来的着火点持续存在并伴随着火现象的问题,提高了PCB的安全性。本申请还公开了一种服务器系统,具有上述有益效果。

Figure 201921914850

The present application discloses a PCB protection system, comprising: a temperature acquisition module arranged on the surface of the PCB and used to collect the temperature of the PCB; a control module connected to the temperature acquisition module and used to generate a control signal when the PCB temperature is greater than a preset temperature value ; An external power supply module connected to the control module and used to stop supplying power to the PCB when a control signal is received. In this application, the temperature of the PCB is monitored by the temperature acquisition module. When the temperature of the PCB is too high, the control module generates a control signal to control the external power supply module to stop supplying power to the PCB, and disconnect the channel of high current passing through the PCB, thereby avoiding the constant short circuit heating of the PCB. The problem that the ignition point caused by the state persists and is accompanied by the fire phenomenon improves the safety of the PCB. The present application also discloses a server system, which has the above beneficial effects.

Figure 201921914850

Description

一种PCB的保护系统及服务器系统A kind of PCB protection system and server system

技术领域technical field

本申请涉及服务器领域,特别是涉及一种PCB的保护系统及服务器系统。The present application relates to the field of servers, and in particular, to a PCB protection system and a server system.

背景技术Background technique

随着互联网数据量出现猛烈增长,计算量及计算频率随之增大,产品的功能需求也越来越多,服务器内部的板卡设计越来越复杂,PCB(Printed Circuit Board,印制电路板)的层数也在不断增加。如果PCB的制作过程中铜皮粘贴不牢,容易产生短路或者电容效应。PCB的钻孔如果不是打在正中间,而是偏向一边,就会产生不均匀匹配,或者容易与中间的电源层或者底层接触,从而产生潜在的短路或者接地不良因素。PCB的材质虽然是阻燃的材质,如UL-94级、HB级等,但是PCB产生燃烧的原因如果是上述短路原因或者是物料造成的,系统电源持续提供的电流,会让PCB不断处于短路发热状态,着火点持续存在并伴随着火现象,安全性低。With the rapid increase in the amount of Internet data, the amount of calculation and the frequency of calculation increase, the functional requirements of products are also increasing, and the board design inside the server is becoming more and more complex. PCB (Printed Circuit Board, printed circuit board) ) is also increasing. If the copper sheet is not firmly pasted during the manufacturing process of the PCB, it is easy to cause a short circuit or a capacitive effect. If the drilling of the PCB is not in the middle, but to one side, uneven matching will occur, or it will be easy to contact the power layer or bottom layer in the middle, resulting in potential short circuit or poor grounding factors. Although the material of the PCB is a flame retardant material, such as UL-94 grade, HB grade, etc., if the cause of the PCB burning is the above-mentioned short circuit or the material, the continuous current provided by the system power supply will keep the PCB in a short circuit. In a heat-generating state, the ignition point persists and is accompanied by a fire phenomenon, and the safety is low.

因此,如何提供一种解决上述技术问题的方案是本领域技术人员目前需要解决的问题。Therefore, how to provide a solution to the above technical problem is a problem that those skilled in the art need to solve at present.

实用新型内容Utility model content

本申请的目的是提供一种PCB的保护系统,当PCB温度过高时,控制外部供电模块停止为PCB供电,断开大电流通过PCB的通道,从而避免了由于PCB不断处于短路发热状态带来的着火点持续存在并伴随着火现象的问题,提高了PCB的安全性;本申请的另一目的是提供一种包括上述PCB的保护系统的服务器系统。The purpose of this application is to provide a protection system for PCB, when the temperature of the PCB is too high, the external power supply module is controlled to stop supplying power to the PCB, and the channel of high current passing through the PCB is disconnected, thereby avoiding the constant short-circuit heating of the PCB. The problem of the continuous existence of the ignition point of the high temperature and the accompanying fire phenomenon improves the safety of the PCB; another object of the present application is to provide a server system including the above-mentioned protection system for the PCB.

为解决上述技术问题,本申请提供了一种PCB的保护系统,包括:In order to solve the above-mentioned technical problems, the present application provides a protection system for PCB, including:

设于PCB表层、用于采集PCB温度的温度采集模块;A temperature acquisition module located on the surface of the PCB and used to collect the temperature of the PCB;

与所述温度采集模块连接、用于当所述PCB温度大于预设温度值生成控制信号的控制模块;a control module connected to the temperature acquisition module for generating a control signal when the PCB temperature is greater than a preset temperature value;

与所述控制模块连接、用于在接收到所述控制信号停止为PCB供电的外部供电模块。An external power supply module connected to the control module and configured to stop supplying power to the PCB upon receiving the control signal.

优选的,该保护系统还包括:Preferably, the protection system further includes:

与所述控制模块连接、用于在接收到所述控制信号切断所述PCB上的电源模块供电的开关模块。A switch module connected to the control module for cutting off the power supply of the power supply module on the PCB after receiving the control signal.

优选的,所述开关模块包括MOS管。Preferably, the switch module includes a MOS transistor.

优选的,所述控制模块为CPLD。Preferably, the control module is a CPLD.

优选的,所述控制模块和所述外部供电模块通过I2C总线连接。Preferably, the control module and the external power supply module are connected through an I2C bus.

优选的,所述控制模块和所述电源模块通过GPIO连接。Preferably, the control module and the power module are connected through GPIO.

优选的,所述温度采集模块为贴装于所述PCB表层上的温度监控芯片。Preferably, the temperature acquisition module is a temperature monitoring chip mounted on the surface layer of the PCB.

优选的,所述温度采集模块为埋于所述PCB表层的覆膜热电偶温度传感器。Preferably, the temperature acquisition module is a film-coated thermocouple temperature sensor buried in the surface layer of the PCB.

优选的,所述温度监控芯片为PX8746芯片。Preferably, the temperature monitoring chip is a PX8746 chip.

为解决上述技术问题,本申请还提供了一种服务器系统,包括如上文任意一项所述的PCB的保护系统。In order to solve the above technical problem, the present application also provides a server system, including the PCB protection system described in any one of the above.

本申请提供了一种PCB的保护系统,通过温度采集模块监控PCB温度,当PCB温度过高时,通过控制模块生成控制信号控制外部供电模块停止为PCB供电,断开大电流通过PCB的通道,从而避免了由于PCB不断处于短路发热状态带来的着火点持续存在并伴随着火现象的问题,提高了PCB的安全性。本申请还提供了一种服务器系统,具有和上述PCB的保护系统相同的有益效果。The present application provides a PCB protection system. The temperature of the PCB is monitored by a temperature acquisition module. When the temperature of the PCB is too high, a control signal is generated by the control module to control the external power supply module to stop supplying power to the PCB, and to disconnect the channel of high current passing through the PCB. Thereby, the problem of the continuous existence of the ignition point and the accompanying fire phenomenon caused by the continuous short-circuit heating state of the PCB is avoided, and the safety of the PCB is improved. The present application also provides a server system, which has the same beneficial effects as the above-mentioned PCB protection system.

附图说明Description of drawings

为了更清楚地说明本申请实施例中的技术方案,下面将对现有技术和实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the prior art and the drawings required in the embodiments. Obviously, the drawings in the following description are only some of the drawings in the present application. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

图1为本申请所提供的一种PCB的保护系统的结构示意图;1 is a schematic structural diagram of a protection system for a PCB provided by the application;

图2为本申请所提供的另一种PCB的保护系统的结构示意图。FIG. 2 is a schematic structural diagram of another PCB protection system provided by the present application.

具体实施方式Detailed ways

本申请的核心是提供一种PCB的保护系统,当PCB温度过高时,控制外部供电模块停止为PCB供电,断开大电流通过PCB的通道,从而避免了由于PCB不断处于短路发热状态带来的着火点持续存在并伴随着火现象的问题,提高了PCB的安全性;本申请的另一核心是提供一种包括上述PCB的保护系统的服务器系统。The core of this application is to provide a PCB protection system, when the temperature of the PCB is too high, the external power supply module is controlled to stop supplying power to the PCB, and the channel of high current passing through the PCB is disconnected, thereby avoiding the constant short-circuit heating of the PCB. The problem of continuous existence of the ignition point of the high temperature and the accompanying fire phenomenon improves the safety of the PCB; another core of the present application is to provide a server system including the above-mentioned protection system for the PCB.

为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

随着互联网数据量出现猛烈增长,计算量及计算频率随之增大,产品的功能需求也越来越多,服务器内部的板卡设计越来越复杂,PCB的层数也在不断增加。如果PCB的制作过程中铜皮粘贴不牢,容易产生短路或者电容效应。PCB的钻孔如果不是打在正中间,而是偏向一边,就会产生不均匀匹配,或者容易与中间的电源层或者底层接触,从而产生潜在的短路或者接地不良因素。如果PCB产生燃烧的原因如果是上述短路原因或者是物料造成的,系统电源仍会持续提供的电流,会让PCB不断处于短路发热状态,着火点持续存在并伴随着火现象,安全性低。基于相关技术的种种问题,本申请通过以下几个实施例提供的PCB的保护系统,能够达到当PCB温度过高时,控制外部供电模块停止为PCB供电,断开大电流通过PCB的通道,提高PCB的安全性的目的。With the rapid increase in the amount of Internet data, the amount of calculation and the frequency of calculation increase, the functional requirements of products are also increasing, the board design inside the server is becoming more and more complex, and the number of layers of the PCB is also increasing. If the copper sheet is not firmly pasted during the manufacturing process of the PCB, it is easy to cause a short circuit or a capacitive effect. If the drilling of the PCB is not in the middle, but to one side, uneven matching will occur, or it will be easy to contact the power layer or bottom layer in the middle, resulting in potential short circuit or poor grounding factors. If the reason for the burning of the PCB is the above-mentioned short circuit or the material, the system power supply will continue to provide current, which will keep the PCB in a short-circuit heating state, the ignition point will continue to exist and accompanied by fire, and the safety is low. Based on various problems in the related art, the present application provides the protection system for the PCB through the following embodiments, which can control the external power supply module to stop supplying power to the PCB when the temperature of the PCB is too high, disconnect the channel of the high current passing through the PCB, and improve the performance of the PCB. the purpose of PCB security.

下面对本申请所提供的一种PCB的保护系统进行详细介绍。A PCB protection system provided by the present application will be introduced in detail below.

请参照图1,图1为本申请所提供的一种PCB的保护系统的结构示意图,该PCB的保护系统包括:Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a protection system for a PCB provided by the application. The protection system for the PCB includes:

设于PCB表层、用于采集PCB温度的温度采集模块1;A temperature acquisition module 1 located on the surface of the PCB and used to collect the temperature of the PCB;

与温度采集模块1连接、用于当PCB温度大于预设温度值生成控制信号的控制模块2;a control module 2 connected to the temperature acquisition module 1 for generating a control signal when the PCB temperature is greater than a preset temperature value;

与控制模块2连接、用于在接收到控制信号停止为PCB供电的外部供电模块3。An external power supply module 3 that is connected to the control module 2 and used to stop supplying power to the PCB when a control signal is received.

具体的,本实施例中温度采集模块1设于PCB表层,以便温度采集模块1采集PCB温度,并将PCB温度发送至与其连接的控制模块2;控制模块2中预先设置有预设温度值,预设温度值与起火点对应,具体应小于起火点对应的温度值,控制模块2将PCB温度与预设温度值进行比较,当PCB温度大于预设温度值时,生成控制信号;外部供电模块3与控制模块2连接,以便接收控制模块2输出的控制信号,外部供电模块3在接收到控制信号后,不再为PCB供电,从而达到断开大电流通过PCB的通道的目的,进而避免了由于PCB不断处于短路发热状态带来的着火点持续存在并伴随着火现象的问题,提高了PCB的安全性。这里的外部供电模块3为服务器系统中的电源模块,不是PCB上的电源模块,当其未接收到控制信号时,为PCB正常供电。作为一种优选的实施例,控制模块2为CPLD(Complex Programmable LogicDevice,复杂可编程逻辑器件)。Specifically, in this embodiment, the temperature acquisition module 1 is arranged on the surface layer of the PCB, so that the temperature acquisition module 1 collects the PCB temperature and sends the PCB temperature to the control module 2 connected to it; the control module 2 is preset with a preset temperature value, The preset temperature value corresponds to the ignition point, and should be smaller than the temperature value corresponding to the ignition point. The control module 2 compares the PCB temperature with the preset temperature value, and when the PCB temperature is greater than the preset temperature value, a control signal is generated; the external power supply module 3 is connected to the control module 2 to receive the control signal output by the control module 2. After receiving the control signal, the external power supply module 3 will no longer supply power to the PCB, so as to achieve the purpose of disconnecting the channel of high current passing through the PCB, thereby avoiding The safety of the PCB is improved due to the continuous existence of the ignition point and the accompanying fire phenomenon caused by the continuous short-circuit heating of the PCB. The external power supply module 3 here is a power supply module in the server system, not a power supply module on the PCB. When it does not receive a control signal, it supplies power to the PCB normally. As a preferred embodiment, the control module 2 is a CPLD (Complex Programmable Logic Device, complex programmable logic device).

具体的,作为一种优选的实施例,温度采集模块1具体可以为贴装于PCB表层的温度监控芯片,温度监控芯片可以选用PX8746芯片,此芯片支持Temp Sence的监控功能,本实施例利用PX8746芯片的温度监控功能采集PCB温度。作为另一种优选的实施例,温度采集模块1可以为埋于PCB表层的覆膜热电偶温度传感器。Specifically, as a preferred embodiment, the temperature acquisition module 1 can be a temperature monitoring chip mounted on the surface of the PCB. The temperature monitoring chip can be a PX8746 chip. This chip supports the monitoring function of Temp Sence. In this embodiment, the PX8746 is used. The temperature monitoring function of the chip collects the PCB temperature. As another preferred embodiment, the temperature acquisition module 1 may be a film-coated thermocouple temperature sensor buried in the surface layer of the PCB.

本申请提供了一种PCB的保护系统,通过温度采集模块监控PCB温度,当PCB温度过高时,通过控制模块生成控制信号控制外部供电模块停止为PCB供电,断开大电流通过PCB的通道,从而避免了由于PCB不断处于短路发热状态带来的着火点持续存在并伴随着火现象的问题,提高了PCB的安全性。The present application provides a PCB protection system. The temperature of the PCB is monitored by a temperature acquisition module. When the temperature of the PCB is too high, a control signal is generated by the control module to control the external power supply module to stop supplying power to the PCB, and to disconnect the channel of high current passing through the PCB. Thereby, the problem of continuous existence of the ignition point and accompanying fire phenomenon caused by the PCB constantly being in a short-circuit heating state is avoided, and the safety of the PCB is improved.

请参照图2,图2为本申请所提供的另一种PCB的保护系统的结构示意图,该PCB的保护系统在上述实施例的基础上:Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of another PCB protection system provided by the application. The PCB protection system is based on the above-mentioned embodiment:

作为一种优选的实施例,该保护系统还包括:As a preferred embodiment, the protection system further includes:

与控制模块2连接、用于在接收到控制信号切断PCB上的电源模块供电的开关模块4。The switch module 4 is connected to the control module 2 and used to cut off the power supply of the power supply module on the PCB after receiving the control signal.

具体的,本实施例在PCB内部的电源模块中还设置了受控于温度变化的开关模块4,该开关模块4与控制模块2通过GPIO(General-purpose input/output,通用型输入输出)连接,以便接收控制模块2输出的控制信号,当接收到控制信号后,该开关模块4断开,以切断PCB内部的供电通路。可以理解的是,这里的电源模块可以指PCB内部的DC-DC转换模块、AC-DC转换模块等电压转换模块,通过控制开关模块4断开,切断电源模块对PCB的负载供电,进一步提高PCB的安全性。作为一种优选的实施例,开关模块4包括MOS管,能够更早识别PCB高温隐患,比传统的Fuse保险丝设计更易用于产品。Specifically, in this embodiment, a switch module 4 controlled by temperature changes is also set in the power module inside the PCB, and the switch module 4 is connected to the control module 2 through GPIO (General-purpose input/output, general-purpose input and output). , so as to receive the control signal output by the control module 2. After receiving the control signal, the switch module 4 is turned off to cut off the power supply path inside the PCB. It can be understood that the power module here can refer to voltage conversion modules such as DC-DC conversion modules and AC-DC conversion modules inside the PCB. By controlling the switch module 4 to be disconnected, the power supply module to the PCB load is cut off, and the PCB is further improved. security. As a preferred embodiment, the switch module 4 includes a MOS tube, which can identify the hidden danger of PCB high temperature earlier, and is easier to use in products than the traditional Fuse fuse design.

可以理解的是,一个PCB内部可以包括多个电源模块,因此,应设置相应个数的开关模块。It can be understood that a PCB may include multiple power modules, therefore, a corresponding number of switch modules should be provided.

作为一种优选的实施例,控制模块2和外部供电模块3通过I2C总线连接。As a preferred embodiment, the control module 2 and the external power supply module 3 are connected through an I2C bus.

具体的,在外部供电模块3中预先设置一个与PCB温度对应的寄存器,控制模块2通过I2C总线修改该寄存器的值,比如,当PCB温度正常时,该寄存器的值为0,当PCB温度过高时,控制模块2将该寄存器的值修改为1,当控制器检测到该寄存器的值为1后,使外部电源模块3停止为PCB供电。Specifically, a register corresponding to the PCB temperature is preset in the external power supply module 3, and the control module 2 modifies the value of the register through the I2C bus. For example, when the PCB temperature is normal, the value of the register is 0. When it is high, the control module 2 modifies the value of the register to 1, and when the controller detects that the value of the register is 1, the controller makes the external power module 3 stop supplying power to the PCB.

综上所述,本申请利用PX8746芯片的温度监控功能,以及增加的MOS电路,根据PCB温度进行主动切断外部供电电源的操作并主动切断MOS电路供电,断开大电流通过PCB的通道,有效实现了产品防火防燃,保证机器无重大安全事故发生。To sum up, this application uses the temperature monitoring function of the PX8746 chip and the added MOS circuit to actively cut off the external power supply according to the PCB temperature, actively cut off the power supply of the MOS circuit, and disconnect the channel of high current passing through the PCB. The product is fire-proof and fire-proof to ensure that no major safety accident occurs in the machine.

另一方面,本申请还提供了一种服务器系统,包括如上文任一实施例的PCB的保护系统。On the other hand, the present application also provides a server system, including the PCB protection system according to any of the above embodiments.

本申请所提供的一种服务器系统具有和上述PCB的保护系统相同的有益效果。The server system provided by the present application has the same beneficial effects as the above-mentioned PCB protection system.

对于本申请所提供的一种服务器系统的介绍请参照上述实施例,本申请在此不再赘述。For the introduction of a server system provided by the present application, please refer to the above-mentioned embodiments, which will not be repeated in the present application.

还需要说明的是,在本说明书中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、物品或者设备中还存在另外的相同要素。It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Furthermore, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, article or device comprising a list of elements includes not only those elements, but also others not expressly listed elements, or also include elements inherent to such a process, article or equipment. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, article, or device that includes the element.

对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下,在其他实施例中实现。因此,本申请将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments enables any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, this application 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.

Claims (9)

1. A protection system of a PCB, comprising:
the temperature acquisition module is arranged on the surface layer of the PCB and used for acquiring the temperature of the PCB;
the control module is connected with the temperature acquisition module, arranged on the PCB and used for generating a control signal when the temperature of the PCB is greater than a preset temperature value;
the external power supply module is connected with the control module and used for stopping supplying power to the PCB when receiving the control signal;
the protection system further comprises:
and the switch module is connected with the control module and used for cutting off the power supply of the power supply module on the PCB after receiving the control signal.
2. The protection system of the PCB of claim 1, wherein the switch module comprises a MOS transistor.
3. The PCB protection system of claim 1, wherein the control module is a CPLD.
4. The protection system of the PCB of claim 1, wherein the control module and the external power module are connected through an I2C bus.
5. The protection system of the PCB of claim 1, wherein the control module and the power module are connected through GPIO.
6. The PCB protection system of any one of claims 1-5, wherein the temperature acquisition module is a temperature monitoring chip attached to the surface layer of the PCB.
7. The PCB protection system of any one of claims 1-5, wherein the temperature acquisition module is a film-covered thermocouple temperature sensor embedded in the surface layer of the PCB.
8. The PCB protection system of claim 6, wherein the temperature monitoring chip is a PX8746 chip.
9. A server system, characterized in that it comprises a protection system of a PCB according to any of claims 1-8.
CN201921914850.7U 2019-11-07 2019-11-07 PCB protection system and server system Active CN211427303U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112099612A (en) * 2020-09-18 2020-12-18 联想(北京)有限公司 Server mainboard, server and power supply control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112099612A (en) * 2020-09-18 2020-12-18 联想(北京)有限公司 Server mainboard, server and power supply control method
US12101885B2 (en) 2020-09-18 2024-09-24 Lenovo (Beijing) Limited Server motherboard, server, and power supply control method

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