Over-temperature protection circuit of fan board, and server system

Abstract

The invention discloses an over-temperature protection circuit of a fan board, and a server system. The over-temperature protection circuit comprises a temperature detection circuit for detecting thetemperature of a power supply input port of the fan board, and a power supply control circuit; and the power supply control circuit is used for utilizing a fan board input hot-plugging chip to cut offpower supply input of the fan board when the temperature is not smaller than a preset temperature threshold value. Compared with other positions of the fan board, the power supply input port of the fan board has fastest temperature rise and maximum heat accumulation, thus the temperature of the power supply input port of the fan board is detected, if the temperature is smaller than the preset temperature threshold value, the fan board is considered to be in a safe state, and a protection action is not executed; and if the temperature is not smaller than the preset temperature threshold value,the fan board is considered to be in an over-temperature state, then power supply input of the fan board is cut off through the fan board input hot-plugging chip, it is guaranteed that the fan boarddoes not have a heat accumulated energy source, thus the fan board is prevented from being burned, and the safe reliability of the server system is improved.

Description

technical field [0001] The invention relates to the field of servers, in particular to an over-temperature protection circuit of a fan board and a server system. Background technique [0002] With the development of network services such as the Internet, servers are widely used in many fields. In the rack cabinet server system, the fan board is an important part, providing heat dissipation for the cabinet to ensure its normal operation. As users have higher and higher heat dissipation requirements for the fan board, the load on the fan board is increasing, and the safety and reliability of the fan board are more important. In the prior art, in the rack cabinet server system, the fan board takes power from the copper bars of the whole cabinet, and then supplies power to each fan respectively. Usually, there are more than 30 server nodes in a cabinet, so the total power of the DC power supply for the cabinet is usually above 6000W. When the fan board is short-circuited, a la...

AI Technical Summary

Problems solved by technology

Usually, there are more than 30 server nodes in a cabinet, so the total power of the DC power supply for the cabinet is usually above 6000W. When the fan board is short-circuited, a large amount of energy will impact the fan board, causing the fan board There is a continuous increase in heat accumulation, and when the heat reaches a certain level, it will cause the fan board to burn out, resulting in a decrease in the security and reliability of the server system.

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