Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Zero-Current-Transition Synchronous Buck Converter Using Auxiliary Circuit with Soft-Switching
Authors Eui-Cheon Lee ; Hyun-Chil Choi
DOI 10.6113/TKPE/2013.18.4.359
Page pp.359-366
ISSN 1229-2214
Keywords ZCT; ZCT-PWM; soft-switching; synchronous buck
Abstract This paper proposes a zero-current-transition(ZCT) synchronous buck converter using auxiliary circuit with soft-switching for light weight and high efficiency. In this scheme, an auxiliary circuit is added to the conventional synchronous rectifier buck converter and used to achieve soft-switching condition for both the main switch and synchronous switch. In addition, the switch in the auxiliary circuit operates under soft-switching conditions. Thus, the proposed converter provides a higher efficiency. The basic operations, in this paper, are discussed and design guidelines are presented. The usefulness of the proposed converter is verified on a 200, 20 prototype converter.