| Abstract |
This paper proposes a zero-voltage-transition PWM synchronous buck converter, which is designed to operate at low voltage and high efficiency typically required for portable systems. A new passive auxiliary circuit that allows the main switch to operate with ZVS has been incorporated in the conventional PWM synchronous buck converter. The operation principles with detailed steady-state analysis of the ZVT PWM synchronous converter are presented. Besides the main switch all of the semiconductor devices operate under soft switching conditions. Thus the auxiliary circuit provides larger overall efficiency. The feasibility of the auxiliary circuit is confirmed by simulation and experimental results. |
