The Study Of High-Voltage Input Two-Stage Voltage Regulator Module

Firstly this paper reviewed the development course of the VRM, status and the facing challenges. The combination of design, as well as the current key issues of the VRM and interleaving parallel technology. A new topology for the future VRM is studied.This paper systematically discussed the key design of 48V input VRM. In view of CUP to VRM's demanding of high-voltage input and low-voltage high-current output, dynamic response, high efficiency and so on., this paper discussed the input filter, synchronous rectifier technology, VRM control technology and its compensation circuit designing.The non-insulated topology characteristics, steady and dynamic principles, parameter design of VRM applied for low-input voltage situation are mainly analyzed. The theory and capability of multi-channel interleaving topology and the magnetic integrated technique are investigated thoroughly. The result of study shows the SR-QSW-Buck converter structure adopted interleaving and magnetic integrated techniques achieves high efficiency, low volume, fast transient response, and satisfies severe performance requirements of VRM.This article has putted the key research on proposed suit to 48V input VRM two-stage converter, and has made the improvement. It explained this converter have some merits of the control to be simple, the high efficiency and the power density. As well as it can improve the dynamic response and reduce the thermal load. Finally the paper has carried on the simulation and the experimental confirmation to this kind of electric circuit topology. Thus the paper has proven the theoretical accuracy.