A Novel Turn-On/Off Snubber for Interleaved Boost Converters

This paper proposes an interleaved boost converter with a novel L-C-D snubber to reduce turn-on and turn-off switching losses. The proposed L-C-D snubber is composed of a single capacitor to form turn-off snubber, and an inductor and a diode connected in parallel to form a turn-on snubber. In this circuit structure, the turn-off snubber is used to limit rising rate of voltage across switch of the proposed converter and to reduce turn-off switching loss. While, the turn-on ones are used to smooth out current through switch of the proposed one and to reduce turn-on switching loss. Furthermore, the proposed converter is operated in an interleaved fashion to reduce output current ripple. Compared with the counterparts of conventional converter topologies, the proposed converter has merits of less component count, higher efficiency, smaller size, and they are easier to implement. Hardware measurement obtained from experimental prototype has been verified these merits.