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.
Original languageEnglish
Title of host publicationProceedings of 2019 IEEE Conference on Power Electronics and Renewable Energy
PublisherIEEE
Publication date2020
Pages448-52
ISBN (Print)9781728109107
DOIs
Publication statusPublished - 2020
Event2019 IEEE Conference on Power Electronics and Renewable Energy - Mövenpick Resort, Elphantine Island, Aswan, Egypt
Duration: 23 Oct 201925 Oct 2019
http://www.ieee-cpere.org/

Conference

Conference2019 IEEE Conference on Power Electronics and Renewable Energy
LocationMövenpick Resort, Elphantine Island
CountryEgypt
CityAswan
Period23/10/201925/10/2019
Internet address

Keywords

  • Resonant power conversion
  • dc-dc converters
  • Offline converters
  • Wide bandgap semiconductors
  • Zero voltage switching (ZVS)

Cite this

Ammar, A. M., Nour, Y., & Knott, A. (2020). A High-Efficiency 1 MHz 65 W GaN-Based LLC Resonant DC-DC Converter. In Proceedings of 2019 IEEE Conference on Power Electronics and Renewable Energy (pp. 448-52). IEEE. https://doi.org/10.1109/cpere45374.2019.8980041