Design of a Single Chip, Single Core, ZVS Buck Converter in MHz Domain

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Abstract

Venturing into MHz switching frequency promotes the integration of inductive DC-DC converter into mobile devices. Combining GaN power switch with low-loss ferrite core materials opens up new possibilities for high-frequency operations. In this work, we investigate the design of a single core inductor and single chip half-bridge switch for ZVS buck converter. Design guidelines are accompanied by preliminary performance assessment via simulations. To demonstrate the performance of our device, we fabricated and tested a 20 W prototype converting 6 - 12 V to 4 V at 2 MHz switching frequency. The prototype achieves η > 90 % at Pout > 15 W and power density of 9.26 W/m2 with < 5 mm thickness.
Original languageEnglish
Title of host publicationProceedings of 2021 IEEE 12th Energy Conversion Congress & Exposition - Asia
PublisherIEEE
Publication date2021
Pages611-617
ISBN (Print)978-1-7281-6345-1
DOIs
Publication statusPublished - 2021
Event2021 IEEE 12th Energy Conversion Congress and Exposition – Asia - Singapore, Singapore
Duration: 24 May 202127 May 2021

Conference

Conference2021 IEEE 12th Energy Conversion Congress and Exposition – Asia
Country/TerritorySingapore
CitySingapore
Period24/05/202127/05/2021
SeriesProceedings of the Energy Conversion Congress and Exposition - Asia, Ecce Asia 2021
ISSN2150-6078

Keywords

  • High frequency
  • High power density
  • Single chip half-bridge
  • ZVS

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