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Abstract

A full-bridge CLLL DC/DC converter that uses an auxiliary circuit is proposed in this paper. The soft switching of lagging leg and auxiliary switches is achieved by the proposed circuit for providing reduced switching losses and high efficiency. The theoretical detail operation of the converter is presented. The proposed converter is verified using MATLAB simulation. Closed loop and open loop circuit models are presented for input step change and output load regulation. A prototype of the proposed DC/DC converter is implemented in MATLAB with switching frequency of 20 KHz and output power of 15 W. The performance of the converter is compared with a conventional full-bridge DC/DC converter.