Method for designing server board-level power supply with input being 48V

Abstract

The invention provides a method for designing a server board-level power supply with input being 48V and belongs to the field of design of server board-level power supplies. By virtue of the method, two-stage voltage conversion is used; the first-stage voltage conversion is characterized by converting 48V to 12V; the second-stage voltage conversion is characterized by converting 12V to power supplies which are applied to other server systems; the input voltage being 48V is converted to a power supply which is applied to a 12V server; subsequently the voltage is used for supplying power for a DC / DC power supply for a CPU and a memory BUCK, so that the input voltage being 48V is converted to voltage being 5V, 3.3V and the like used by the CPU, the Memory and a system in the server, and the overall conversion efficiency of the power supply is improved.

Description

technical field [0001] The present invention relates to the field of server board-level power supply design, specifically a method for designing a server board-level power supply with an input of 48V, which converts the input voltage of 48V into 5V, 3.3V and other voltages used in the CPU, Memory, and system used in the server . Background technique [0002] Many electrical appliances are powered by low-voltage DC, but the most common form of power supply is AC 220V. So, how do these low-voltage DC appliances work? To make them work, we have to solve two problems: how to step down the voltage, and how to convert AC to DC. Transformers made according to Faraday's law of electromagnetic induction can reduce the voltage of alternating current; alternating current to direct current must first pass through rectified current (generally bridge rectification), in order to obtain pure direct current, a filter circuit (generally composed of capacitors or inductors) is required , so...

AI Technical Summary

Problems solved by technology

[0003] The traditional server power supply converts 220V AC power into 12V DC power for the server through AC / DC power supply. When the number of servers is small, this method is simple to connect, easy to install, and has strong practicability; but in large computing centers and server rooms. , the disadvantages of using traditional 12V DC power supply applications appear

First of all, the conversion efficiency of AC / DC power supply to 12V voltage is lower than that of direct conversion to 48V voltage. Secondly, the power consumption of the server is about kilowatts. Using 12V power supply, the current reaches hundreds of amperes, and the current transmission loss is prominent. Using 48V power supply can reduce the current to the original current. 1 / 4 of the current transmission loss will be as low as 1 / 16 of the original current

Finally, P12V power supply is affected by transmission loss and needs to be close to the server, which has a great impact on the server layout of the computer center.

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