CN107575414A - A kind of fan control protection circuit and guard method - Google Patents

Abstract

A kind of fan control protection circuit, including regulation and control and monitoring device, protection control device and BMC devices；Described regulation and control and monitoring device are used to the rotating speed of fan is regulated and controled and monitored；Described protection control device is used to after regulation and control and monitoring device failure fan is carried out continuing to regulate and control；Described BMC devices output I2C signals to regulation and control and monitoring device and protection control device, regulation and control and monitoring device is connected with protection control device by I2C signal wires.Solve machine phenomenon of being delayed caused by server overheat caused by regulation and control and monitoring device damage, reduce client and negatively affected caused by the machine of delaying.

Description

A fan control protection circuit and protection method

technical field

The invention relates to the technical field of server fan protection, in particular to a fan control and protection circuit and protection method.

Background technique

With the continuous upgrading of server products, the demand for high-density servers is increasing. This requires designers to have higher and higher heat dissipation requirements for servers when developing products. Ensuring the heat dissipation of important parts of servers has become our server design. The key work is that when the fan control fails, the server is likely to be down due to equipment component failure.

Contents of the invention

The purpose of the present invention is to provide a fan control and protection circuit and protection method, which are used to solve the problem that the server is likely to be down when the fan control fails.

The technical scheme that the present invention solves its technical problem to take is:

A fan control and protection circuit, including a regulation and monitoring device, a protection control device and a BMC device; the regulation and monitoring device is used to regulate and monitor the speed of the fan; the protection control device is used for regulating and monitoring Continue to regulate the fan after the device fails; the BMC device outputs an I2C signal to the regulation and monitoring device and the protection control device, and the regulation and monitoring device and the protection control device are connected through the I2C signal line.

Further, the control and monitoring device includes a W83795ADG chip, the 4 FANIN pins of the W83795ADG chip are respectively connected to 4 groups of fan connectors; the FANCTL pins of the W83795ADG chip are connected to 4 groups of fan connectors for monitoring the fan speed .

Further, the protection control device includes a PCA9554 chip; the PCA9554 chip is connected to the FANCTL pin of the W83795ADG chip.

Further, an alarm device is also included, the input end of the alarm device is connected to the output end of the BMC device; the alarm device includes a sound alarm device or a light alarm device; the sound alarm device includes a buzzer, and the light alarm device Unit includes warning light.

A protection method for a fan control protection circuit, using the method, specifically includes the following steps:

The control and monitoring device controls and monitors the fan speed in real time;

The BMC device judges whether the control and monitoring device is working normally; if yes, continue to judge, if not, execute the next step;

The BMC device controls the work of the protection control device;

The protection control device controls and monitors the speed of the fan.

Further, when the BMC device judges that the regulation and monitoring device is not working normally, the BMC device also controls the alarm device to give an alarm.

The summary of the invention provided above is only a description of the embodiments of the present invention, rather than the invention itself.

The effects provided in the summary of the invention are only the effects of the embodiments, rather than all the effects of the invention. One of the above technical solutions has the following advantages or beneficial effects:

Use the PCA9554 chip to realize the emergency control of the fan. When the W83795ADG fails to control the fan and read the fan speed, the PCA9554 chip is controlled through the I2C signal to make the fan run at full speed, thereby preventing the downtime caused by the overheating of the server due to the fan failure. occurrence of the phenomenon.

It solves the downtime phenomenon caused by the overheating of the server caused by the damage of the control and monitoring device, and reduces the negative impact caused by the downtime for customers.

Description of drawings

The accompanying drawings described here are used to provide further explanations of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the module connection schematic diagram of the embodiment of the present invention;

Fig. 2 is a schematic diagram of circuit structure connection of an embodiment of the present invention;

Fig. 3 is a schematic flow chart of a method according to an embodiment of the present invention.

detailed description

In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the present invention.

As shown in Figure 1, a fan control and protection circuit includes a regulation and monitoring device, a protection control device and a BMC device; the regulation and monitoring device is used to regulate and monitor the speed of the fan; After the device fails, the fan is continuously regulated; the BMC device outputs an I2C signal to the regulation and monitoring device and the protection control device, and the regulation and monitoring device and the protection control device are connected through the I2C signal line.

It also includes an alarm device, the input end of the alarm device is connected with the output end of the BMC device; the alarm device includes a sound alarm device or a light alarm device; the sound alarm device includes a buzzer, and the light alarm device includes an alarm lamp.

As shown in Figure 2, the control and monitoring device includes a W83795ADG chip. The 4 FANIN pins of the W83795ADG chip are respectively connected to 4 sets of fan connectors; the FANCTL pins of the W83795ADG chip are connected to 4 sets of fan connectors for monitoring the fan speed. . The protection control device includes a PCA9554 chip; the PCA9554 chip is connected to the FANCTL pin of the W83795ADG chip.

As shown in FIG. 3 , a protection method for a fan control protection circuit specifically includes the following steps:

Step 1) The regulating and monitoring device controls and monitors the rotating speed of the fan in real time;

Step 2) The BMC device judges whether the control and monitoring device is working normally; if yes, then continue to judge, if not, then perform the next step;

Step 3) The BMC device controls the work of the protection control device;

Step 4) The protection control device controls and monitors the rotational speed of the fan.

When the BMC device judges that the regulation and monitoring device is not working normally, the BMC device also controls the alarm device to give an alarm.

The above is only a preferred embodiment of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered as the present invention. protection scope of the invention.

Claims (6)

1. a kind of fan control protection circuit, it is characterized in that, including regulation and control and monitoring device, protection control device and BMC devices； Described regulation and control and monitoring device are used to the rotating speed of fan is regulated and controled and monitored；Described protection control device is used to adjust Fan is carried out continuing to regulate and control after control and monitoring device failure；Described BMC devices output I2C signals extremely regulate and control and monitoring device With protection control device, regulation and control and monitoring device are connected with protection control device by I2C signal wires.

2. circuit according to claim 1, it is characterized in that, described regulation and control and monitoring device include W83795ADG chips, 4 FANIN pins of W83795ADG chips connect 4 groups of fan connectors respectively；The FANCTL pins of W83795ADG chips and 4 Group fan connector is connected, for monitoring the rotating speed of fan.

3. circuit according to claim 2, it is characterized in that, described protection control device includes PCA9554 chips； PCA9554 chips are connected with the FANCTL pins of W83795ADG chips.

4. circuit according to claim 1, it is characterized in that, in addition to warning device, the input of the warning device with The output end of BMC devices is connected；Warning device includes audible alarm unit or light alarming device；Described audible alarm unit Including buzzer, described light alarming device includes warning light.

5. a kind of guard method of fan control protection circuit, using the method described in any one of Claims 1-4 4, it is special Sign is to specifically include following steps：

Regulation and control and monitoring device control and monitor the rotating speed of fan in real time；

BMC devices judge regulation and control and monitoring device whether normal work；If it is, continue to judge, if it is not, then under performing Single stepping；

The control protection control device work of BMC devices；

Protection control device controls and monitors the rotating speed of fan.

6. according to the method for claim 5, it is characterized in that, judge that regulation and control and monitoring device do not have normal work in BMC devices When making, in addition to BMC devices control warning device is alarmed.