Design of a Redundant Paralleled Voltage Regulator Module System with Improved Efficiency and Dynamic Response

Author

Mishra, Santanu K. ; Zhou, Steve ; Huang, Wenkang ; Schuellein, George

Author_Institution

Int. Rectifier, Rhode Island IC Design Center, North Kingstown, RI

Volume

5

fYear

2006

fDate

8-12 Oct. 2006

Firstpage

2524

Lastpage

2528

Abstract

This paper discusses the design of true redundant, N+l parallel voltage regulator module (VRM) system with low droop resistance. Average current mode control and limited gain for voltage compensation is used to achieve droop current sharing between parallel modules without single point failure. Small signal model of the current sharing scheme is derived and experimentally validated. A novel local sense feedback is used to improve the dynamic performance of the parallel system. Experimental results from a prototype confirm the current sharing between two VRMs to be within 10 % and the dynamic response improvement by 33 % due to local sense feedback

Keywords

electric current control; redundant number systems; voltage regulators; current mode control; current sharing; dynamic response improvement; local sense feedback; low droop resistance; parallel modules; parallel system; redundant paralleled voltage regulator module system design; single point failure; small signal model; voltage compensation; Circuit faults; Control systems; Diodes; Drives; Feedback; Master-slave; Power supplies; Rectifiers; Regulators; Voltage control; Current Sharing; Parallel Module; Redundancy; VRM;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE

Conference_Location

Tampa, FL

ISSN

0197-2618

Print_ISBN

1-4244-0364-2

Electronic_ISBN

0197-2618

Type

conf

DOI

10.1109/IAS.2006.256894

Filename

4025583