A Single Phase Voltage Regulator Module (VRM) With Stepping Inductance for Fast Transient Response

Author

Lu, Dylan Dah-Chuan ; Liu, Joe C P ; Poon, Franki N K ; Pong, Bryan Man Hay

Author_Institution

Sch. of Electr. & Inf. Eng., Sydney Univ., NSW

Volume

22

Issue

2

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

417

Lastpage

424

Abstract

A single-phase fast transient converter topology with stepping inductance is proposed. The stepping inductance method is implemented by replacing the conventional inductor in a buck converter by two inductors connecting in series. One has large inductance and the other has small inductance. The inductor with small inductance will take over the output inductor during transient load change and speed up dynamic response. In steady state, the large inductance takes over and keeps a substantially small ripple current and minimizes root mean square loss. It is a low cost method applicable to converters with an output inductor. A hardware prototype of a 1.5-V dc-dc buck converter put under a 100-A transient load change has been experimented upon to demonstrate the merit of this approach. It also serves as a voltage regulator module and powers up a modern PC computer system

Keywords

DC-DC power convertors; inductance; transient response; voltage regulators; 1.5 V; 100 A; dc-dc buck converter; dynamic response; fast transient response; single phase voltage regulator module; stepping inductance; transient load change; Buck converters; Inductance; Inductors; Joining processes; Regulators; Root mean square; Steady-state; Topology; Transient response; Voltage; Buck converter; fast transient; voltage regulator (VR);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2006.889909

Filename

4118317