Single-wing ladder resonant multilevel converter

Abstract

This paper presents an innovative resonant multilevel modular bidirectional dc-dc switched-capacitor converter based on GaN switching devices. Proposed converter achieves the following advantages; soft switching, low voltage device rating, boost or buck mode, common ground, high conversion ratio, variety of environment temperature operation, simple control algorithm and modular structure. The proposed single-wing ladder resonant multilevel converter is composed of COG temperature compensating ceramic capacitors along with GaN switching devices that can handle high switching frequency hence, high power density. Converter proposed in this paper has superior advantages over the traditional multilevel modular switched capacitor dc-dc converters due to its modular structure, high efficiency, common ground, low voltage device stress, and simplicity of the control algorithm.