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 

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences  Vol.E92-A  No.2  pp.451-455
Publication Date: 2009/02/01
Online ISSN: 1745-1337
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
coupled inductor,  multiphase,  buck converter,  DC-DC converter, 

Full Text: PDF(278KB)

Summary: 
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.