A new, soft-switched boost converter with isolated active snubber

A boost power converter which employs an isolated active snubber to reduce the losses caused by the reverse-recovery characteristic of the boost rectifier and the turn-on discharge loss of the output capacitance of the boost switch is described. The proposed isolated active snubber consists of a coupled inductor, clamp capacitor and ground-referenced n-type MOSFET. The performance of the proposed power converter is evaluated on a 1 kW, universal-line-range, boost input-current shaper.