Integrated zero-voltage-switching boost flyback converter

This paper proposes an integrated zero-voltage-switching (ZVS) boost flyback converter. Specifically, in the proposed converter, a boost inductor with an auxiliary winding is used to obtain ZVS of power switches and maintain a continuous input current. A half-bridge flyback is integrated in the proposed converter to provide a regulated output and obtain zero-current-switching (ZCS) of the output rectifier. The proposed converter achieves high efficiency due to soft-switching of all semiconductor devices. The operation principle and steady-state analysis of the proposed converter are provided in detail. A prototype of the proposed converter is developed, and its experimental results are presented for validation.