A High-Efficiency 1 MHz 65 W GaN-Based LLC Resonant DC-DC Converter

descriptionPublicationkeyboard_double_arrow_right Article , Conference object , Other literature type 01 Oct 2019 Denmark Publisher:IEEEJournal:2019 IEEE Conference on Power Electronics and Renewable Energy (CPERE)Funded by:EC | LEDLUM

Authors: Ammar, Ahmed M.; Nour, Yasser; Knott, Arnold;

doi: 10.1109/cpere45374.2019.8980041 , 10.5281/zenodo.3491812 , 10.5281/zenodo.3491813

A High-Efficiency 1 MHz 65 W GaN-Based LLC Resonant DC-DC Converter

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Abstract

This paper presents an LLC resonant DC-DC converter for single-phase offline converters. A 1 MHz 400 V to 48 V prototype employing gallium nitride (GaN) switching devices is designed and implemented. A high-frequency magnetic material is used for the magnetic devices, with the resonant inductor integrated in the transformer. The converter operation is based on soft switching and achieves up to 65 W of output power with a peak efficiency of 96 % at full-load. Inherent load regulation capability is demonstrated from 5 to 65 W of power with fixed switching frequency, while line regulation for 360 to 440 V input is verified with a frequency modulation range of 816 to 1256 KHz respectively.

Country

Denmark

Related Organizations

Technical University of Denmark
Denmark

Keywords

Offline converters, dc-dc converters, Resonant power conversion, offline converters, zero voltage switching (ZVS), Zero voltage switching (ZVS), resonant power conversion, wide bandgap semiconductors, Wide bandgap semiconductors

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