Light load efficiency improvement for laptop VRs

被引：11
|
作者：
Sun, Julu [1 ]
Ren, Yuancheng [1 ]
Xu, Ming [1 ]
Lee, Fred C. [1 ]
机构：
[1] Virginia Polytech Inst & State Univ, Ctr Power Elect Syst, 146 Whittemore Hall, Blacksburg, VA 24061 USA
来源：
APEC 2007: TWENTY-SECOND ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, VOLS 1 AND 2 | 2007年
基金：
美国国家科学基金会;
关键词：
D O I：
10.1109/APEX.2007.357504
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Extending battery life is a big challenge for today's laptop computer, and light load efficiency is very important for battery life extension. In this paper, a novel non-linear inductor is proposed to improve DCM efficiency for laptop CPU VR. The control method with a thorough analysis is proposed for the non-linear inductor to achieve high efficiency, required output voltage ripple and transient response. Adaptive on time control is then proposed to achieve higher efficiency when Buck is running at CCM. Finally, two-stage power architecture is proposed to achieve higher efficiency within the whole CPU load range keeping the similar cost. All of the above methods are verified by experimental results.
引用
收藏
页码：120 / +
页数：2
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