A novel isolated buck-boost converter

This paper proposed a novel isolated buck-boost PWM DC-DC converter circuit. The topology which merged buck-boost mode with flyback mode can share the transformer and switch. Not only isolated buck-boost mode current but also flyback mode current added on the one output current of the converter because the topology merged buck-boost mode with flyback mode. A new converter has outstanding advantages over the conventional dc-dc converters with respect to high efficiency, high power density, and component utilization. The operation principle of the proposed converter is described and verified by simulation and experiment results. Also this paper presents novel circuit and simulation result of new active isolated buck-boost converter.