Title :
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
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;
Conference_Titel :
Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
1-4244-0364-2
Electronic_ISBN :
0197-2618
DOI :
10.1109/IAS.2006.256894
