Quasi-Resonant Passive Snubber for Improving Power Conversion Efficiency of a DC–DC Step-Down Converter

A quasi-resonant passive snubber for the conventional dc-dc step-down converter is proposed. The snubber uses six passive components to achieve a zero-current turn-on and zero-voltage turn-off of the switch, and to suppress the reverse recovery current of diode. At input voltage of 200 V, output voltage of 100 V, output power of 300 W, and switching frequency of 190 kHz, the snubber increased the ...