Analysis of Coupled Inductors for Low-Ripple Fast-Response Buck Converter

Santhos A. WIBOWO; Zhang TING; Masashi KONO; Tetsuya TAURA; Yasunori KOBORI; Ken-ichi ONDA; Haruo KOBAYASHI

doi:10.1587/transfun.E92.A.451

Special Section on Analog Circuit Techniques and Related Topics

Analysis of Coupled Inductors for Low-Ripple Fast-Response Buck Converter

Santhos A. WIBOWO, Zhang TING, Masashi KONO, Tetsuya TAURA, Yasunori KOBORI, Ken-ichi ONDA, Haruo KOBAYASHI

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Keywords: coupled inductor, multiphase, buck converter, DC-DC converter

JOURNAL RESTRICTED ACCESS

2009 Volume E92.A Issue 2 Pages 451-455

DOI https://doi.org/10.1587/transfun.E92.A.451

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Abstract

This letter presents an analysis of characteristics of multiphase buck converters with coupled inductors. We derive equivalent inductances that provide both low per-phase steady-state ripple current and fast transient response. The characteristics of coupled-inductor circuits — low per-phase ripple current and fast response — were examined and verified by circuit simulation and experiments.

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