Abstract

To meet high efficiency,low cost and high reliability power requirements of high-performance computer system,12V DC bus distributed power system was developed in this paper.The block diagram and operation principle of power supply for cabinet and motherboard were described.The voltage regulator module for processor in motherboard was analyzed in detail.Based on adaptive voltage position control,the small-signal model of voltage regulator module was presented,and output impedance and system control bandwidth were discussed.Following the proposed design guidelines of compensator,the experimental results demonstrate very good transient response.The application results show the proposed power supply can fully meet the power requirements of high-performance computer system.

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