Integrated Magnetic Self-Driven ZVS Nonisolated Full-Bridge Converter

Author

Jin, Ke ; Sun, Yi ; Xu, Ming ; Sterk, Douglas ; Lee, Fred C.

Author_Institution

Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

Volume

57

Issue

5

fYear

2010

fDate

5/1/2010 12:00:00 AM

Firstpage

1615

Lastpage

1623

Abstract

This paper proposes a high-efficiency high-power-density voltage regulator (VR). An integrated magnetic self-driven full-bridge topology is employed as the main circuit. The proposed VR runs at a 700-kHz switching frequency for a 1 Unit Height (1U) form factor. A novel synchronous rectifier drive method is used to achieve high efficiency. The direct current resistance (DCR) current-sensing method is used for the integrated transformer to achieve adaptive voltage position. Compared with the traditional multiphase buck converter, the proposed solution has higher efficiency, a smaller passive component footprint, and a lower device cost. A 1U 700-kHz VR prototype is built in the laboratory, and it achieves 88.2% efficiency at a 1.2-V/130-A output. The experimental result verifies the theoretical analysis.

Keywords

power transformers; rectifying circuits; switching convertors; voltage regulators; zero voltage switching; ZVS nonisolated full-bridge converter; current 130 A; direct current resistance current-sensing method; frequency 700 kHz; high-power-density voltage regulator; integrated magnetic self-driven ZVS converter; integrated transformer; multiphase buck converter; synchronous rectifier drive; voltage 1.2 V; Self-driven; soft switching; voltage regulator (VR);

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2009.2031192

Filename

5229208