Mainboard cold standby power supply circuit and storage server

Abstract

The invention discloses a mainboard cold standby power supply circuit which comprises a PSU and a BBU used for supplying power to a mainboard, a first switching circuit arranged on a power supply lineof the PSU, a second switching circuit arranged on a power supply line of the BBU, a current limiting switching circuit connected with the first switching circuit in parallel, and a control circuit.When the mains supply is just powered on or the PSU is just inserted into the circuit board, output is not stable, the PSU supplies power to the rear-end circuit through the current-limiting switch circuit. According to the mainboard cold standby power supply circuit, the output current of the PSU is limited, so that the situations of arc and the like caused by impact of large current generated when the output of the PSU is not stable on a rear-end circuit are avoided, namely, PSU hot plugging can be reliably realized without depending on a switching circuit working in an amplification region,and the safety and reliability of the mainboard cold standby power supply circuit are improved. The invention further discloses a storage server which has the same beneficial effects as the mainboardcold standby power supply circuit.

Description

technical field [0001] The invention relates to the field of server power supply, in particular to a motherboard cold standby power supply circuit and a storage server. Background technique [0002] Currently, the power supply of the storage server includes a PSU (Power Supply Unit, power supply unit) and a BBU (Battery Backup Unit, backup battery); wherein, the PSU is an AC-to-DC power supply module with mains input and DC output. When the mains power exists, the PSU supplies power to the storage server, and the BBU exists as a cold backup; when the mains power fails, the PSU exits, and the BBU provides the power required for data backup of the storage server. [0003] In the prior art, the cold standby power supply circuit of the mainboard of the storage server is as follows: figure 1 As shown, the controller detects the PSU in-position signal (for judging whether the PSU is plugged in), the PSU input detection signal (for judging whether there is mains electricity), the ...

AI Technical Summary

Problems solved by technology

However, the existing mainboard cold standby power supply circuit has the following problems: the hot-swapping function is realized by relying on the switch tube in the switch tube circuit to work in the enlarged area, but the switch tube is not easy to control when the switch tube works in the enlarged area, and the switch tube works in the enlarged area Severe heat generation, if it works in the enlarged area for a long time, the switch tube will burn out due to untimely heat dissipation, thus reducing the safety and reliability of the cold standby power supply circuit of the main board

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