Conference paper Open Access

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

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

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<oai_dc:dc xmlns:dc="" xmlns:oai_dc="" xmlns:xsi="" xsi:schemaLocation="">
  <dc:creator>Ammar, Ahmed M.</dc:creator>
  <dc:creator>Nour, Yasser</dc:creator>
  <dc:creator>Knott, Arnold</dc:creator>
  <dc:description>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.</dc:description>
  <dc:subject>resonant power conversion</dc:subject>
  <dc:subject>dc-dc converters</dc:subject>
  <dc:subject>offline converters</dc:subject>
  <dc:subject>wide bandgap semiconductors</dc:subject>
  <dc:subject>zero voltage switching (ZVS)</dc:subject>
  <dc:title>A High-Efficiency 1 MHz 65 W GaN-Based LLC Resonant DC-DC Converter</dc:title>
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