Analysis And Design Of A Zvs Converter For High Voltage Input-Low Voltage Output Application

This paper proposes a full-bridge (d = 50%) cascaded buck topology which is a very suitable circuit for high voltage inputlow voltage output applications with high output current. Benefiting from working under a large duty cycle, the proposed converter can easily achieve zero voltage switching turn-on and turn-off of active switches in a full bridge. Small-signal model of this topology is analyzed through its corresponding peak current mode control. Its small-signal transfer function is given, and the control loop design is discussed. Advantages of this topology and operation principles are analyzed. Design guidelines, drawn from this analysis, are applied on a low-voltage (3.3 V) output voltage prototype to validate the proposed concept. (C) 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.