An efficient active LC snubber for multi-output converters with flyback synchronous rectifier

Abstract

An efficient active LC snubber for multi-output converters with flyback synchronous rectifier (SR) is proposed in this paper. The proposed active LC snubber can be used to reset transformer and suppress switching surges. Besides, by storing surge energy in the proposed active LC snubber and then releasing it to the flyback SR, the converter can achieve high efficiency. For a forward converter with flyback SR, 90.8%, the maximum output efficiency, can be achieved. Experimental results also show that the output efficiency of this converter with the proposed active LC snubber is higher than that of active-clamped-based converters.