Simplified Resonant DC-DC Converter with High Frequency Drive

Abstract

We present a new circuit for resonant dc-dc converter of forward type made of a small number of components which is almost the same in a fly back converter as a smoothing inductor and a free-wheel diode are removed. As parasitic elements like stray capacitors and inductors are operating as a part of a resonant circuit, high frequency switching of low losses can be obtained. A leakage inductance of the transformer is utilized as a inductor of resonant circuit although it prevents the output power going through the transformer in conventional converters.