Design of High Efficiency and High Frequency GaN DC/DC Converter

Abstract

This paper presents a design of a high efficiency and high frequency synchronous buck converter based on GaN devices. Gallium Nitride (GaN) FETs are applied in this design to achieve the low power losses at high operation frequency. Synchronous buck topology is used to increase the system efficiency and reduce conduction losses. Converter is tested in several frequencies 100, 200, 400 kHz. The paper also contains the theoretical analysis of power losses in the converter. A synchronous buck converter prototype is designed and tested with peak efficiency of 98.9%.