Abstract

LLC resonant converter is a popular topology for DC-DC converters because of its soft switching characteristics. It has many strong points for example high efficiency, high power density, and lower noise. The traditional Si MOSFET LLC resonant converter cannot continue to improve due to the limitations of the Si characteristics in terms of frequency and efficiency. This article explores the advantages of SiC MOSFET in LLC resonant converter, and compares the conversion efficiency for trench-gate SiC MOSFET, planar-gate SiC MOSFET and Si MOSFET.

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