A new zero-voltage zero-current mixed mode switching DC/DC converter with low device stresses

Abstract

The authors propose a novel soft switching DC/DC converter with combined zero-voltage and zero-current switching. The power transfer mechanism of the proposed converter is different from that of such resonant-type converters as the resonant converter and quasi-resonant converter. The VAr (volt-ampere reactive) rating of the resonant capacitor of the proposed converter is very small compared with that of the resonant-type converter. The applied voltages to all the devices are limited to the supply voltage. This converter can operate in both constant and variable frequency with simple control. The basic operation of the proposed converter is described. Simulation was performed at 100 kHz and several-kilowatt output power, and experimental results are presented.<>