Zero-voltage and zero-current switching convertor with tapped inductor

Abstract

Tapped inductor boost converter disclosed. The tapped inductor boost converter include a tapped inductor, having a primary winding, a secondary winding, and a tap connected to a contact point of the primary winding and the secondary winding, a switch for connecting or disconnecting a current path between the tap and ground, a switch control circuit for detecting a zero voltage crossing during resonance with a first duty signal and a voltage across the switch, and outputting a second duty signal that turns off the switch, a snubber circuit connected in parallel with the switch, a clamping diode for providing a forward current path from an output terminal of the snubber circuit to an output terminal of the tapped inductor boost converter, an output diode for providing a forward current path from the output terminal of the tapped inductor to the output terminal of the converter output terminal, and a recovery capacitor connected between the output terminal of the tapped inductor and the output terminal of the snubber circuit.