Design the High-frequency DC-DC Converter with Integrated Coupled Inductor and Current-Balancing-Transformer

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Abstract

This paper presents a design for a high-frequency DC-DC converter with the coupled inductor and integrated current balancing transformer. The converter can deliver 32 W from 12 V intput to the 4 V output. A high efficiency and high power density are achieved by ZVS turn-on and the magnetic integrated. In order to deliver a 6 A rated output current, a two-phase QSW Buck converter operating at the synchronous mode is seleted as the topology to reduce the conduction loss both for the switches and the windings. The current unbalancing issue is solved by an integrated magnetic component with a customized core. The semiconductors selection and the core design are also discussed in the paper. A 1 MHz prototype is built to verify the design process. The prototype achieves 97.45% efficiency at 4 V/ 6 A output and the ZVS turn-on capability is also verified experimentally.

Original languageEnglish
Title of host publicationProceedings of 35th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherIEEE
Publication dateMar 2020
Pages2610-2616
Article number9124329
ISBN (Electronic)9781728148298
DOIs
Publication statusPublished - Mar 2020
Event35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020 - New Orleans, United States
Duration: 15 Mar 202019 Mar 2020

Conference

Conference35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Country/TerritoryUnited States
CityNew Orleans
Period15/03/202019/03/2020
SponsorIEEE, IEEE, Power Sources Manufacturers Association

Keywords

  • Converter design
  • Coupled inductor
  • Current balancing transformer
  • High-frequency DC-DC converter
  • Planar magnetics
  • ZVS Buck converter

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