Under voltage protection (UVP) device and protection method of server PSU power supply

Abstract

The invention discloses an under voltage protection (UVP) device of a server PSU power supply. The device includes the PSU power supply and a server CPU, and further includes: a voltage sampling module, which collects output voltage of the PSU power supply to obtain sampled voltage, and transmits the sampled voltage to a voltage comparison module; the voltage comparison module, which compares thesampled voltage with a preset voltage threshold value, and transmits a comparison result to a frequency-reduction control module; and the frequency-reduction control module, which controls, accordingto the comparison result of the voltage comparison module, whether frequency reduction is carried out on the server CPU. According to the device, a feedback result can be effectively sent to the server CPU in time, frequency reduction of the server CPU can be controlled in time, thus the problem that too much power consumption of the server CPU causes drastic reduction of the output voltage of thePSU power supply is solved, and power-down, restarting or even a crash phenomenon, caused by too low output voltage of the PSU power supply, of a system is avoided.

Description

technical field [0001] The invention relates to the field of server power supplies, in particular to a server PSU power supply low-voltage protection device. Background technique [0002] With the development of server technology and the further improvement of the CPU integration level used in the server, the load current of the CPU is also further increased. Currently, the power consumption of the CPU under research can reach more than 200W, and the transient power consumption can reach more than 400W. Bring further challenges to server development. [0003] In the current server design, due to the large fluctuations in the transient power consumption of the CPU, affected by the impedance on the transmission path, it is very easy to cause a large drop in the output voltage of the server PSU power supply, which in turn triggers the input UVP protection (Under Voltage Protection) of the system. , low voltage protection), power failure, restart, or even downtime occurs, causi...

AI Technical Summary

Problems solved by technology

[0007] The first solution will bring higher cost requirements to the design of the server, and cannot completely avoid the occurrence of this problem

[0008] The second solution is through software processing. Since the voltage value obtained by the BMC can only be obtained once by one polling, the data processing rate is low, which may cause a lagging response, and even for a short voltage drop, it cannot be obtained and there is no response.

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