Abstract
The purpose of this paper is to present the digital peak current mode phase-shifted full-bridge zero volt switching dc-dc converter for the data center in the higher voltage direct current (HVDC) system, and show its transient response. The proposed peak current mode control circuit is composed of the RC integrator and comparator only and can detect the peak current in real time. At first, the basic operation of proposed method is confirmed by using the buck type dc-dc converter. Furthermore, the proposed method is applied to the prototype of 380V phase-shifted full-bridge zero volt switching dc-dc converter. The system has to be always stable in the transient response even if the input voltage is changed. As a result, the convergence time of output voltage is improved by about 50% compared with the conventional digital voltage mode control when the input voltage is 380V and 300V.
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