Title :
A high efficiency topology for 12 V VRM-push-pull buck and its integrated magnetics implementations
Author :
Wei, Jia ; Xu, Peng ; Lee, Fred C.
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
As computer processors move forward quickly, their power management becomes more and more challenging. Nowadays, for the desktop and workstation applications, voltage regulator module (VRM) input voltage has moved to the 12 V output of the silver box. The state of the art 12 V VRM topology is buck. Because of the extreme duty-cycle, buck has a lot of limitations however. This paper presents a high efficiency, fast transient response topology for the 12 V VRM application-push-pull buck (PPB). The push-pull buck has significantly better performance over buck converter. A few integrated magnetics implementations are discussed and tested. Experimental results confirm the theoretical prediction
Keywords :
DC-DC power convertors; computer power supplies; microprocessor chips; network topology; transient response; voltage regulators; 12 V; VRM; computer processors; fast transient response topology; integrated magnetics; power management; push-pull buck topology; state of the art; voltage regulator module; Application software; Buck converters; Energy management; Magnetics; Regulators; Silver; Topology; Transient response; Voltage; Workstations;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989319
