Title :
Two-stage voltage regulator for laptop computer CPUs and the corresponding advanced control schemes to improve light-load performance
Author :
Wei, Jia ; Lee, Fred C.
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
This paper presents a two-stage voltage regulator (VR) for the laptop computer CPUs. The advanced control schemes to improve light-load efficiency are also discussed. The test results show that the two-stage solution achieves higher efficiency than the single-stage solution over a wide load range under the entire input voltage range. It is a promising solution for future laptop VRs.
Keywords :
DC-DC power convertors; computer power supplies; laptop computers; load regulation; voltage control; voltage regulators; advanced control schemes; laptop VR; laptop computer CPU; light-load efficiency; two-stage voltage regulator; Batteries; Central Processing Unit; DC-DC power converters; Lighting control; Lithium; Microprocessors; Portable computers; Regulators; Virtual reality; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2004. APEC '04. Nineteenth Annual IEEE
Print_ISBN :
0-7803-8269-2
DOI :
10.1109/APEC.2004.1295990
