A 400-mA current-mode buck converter with a self-trimming current sensing scheme

被引：0
|
作者：
Youngkook Ahn
Donghun Heo
Hyunseok Nam
Jeongjin Roh
机构：
[1] Hanyang University,Department of Electrical Engineering
来源：
Analog Integrated Circuits and Signal Processing | 2011年 / 66卷
关键词：
DC–DC converter; Power management IC; Buck converter; Current-sensing; Analog circuit;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A current-programmed mode (CPM) controller is designed for improved DC–DC converter control. The key building block of the CPM controller is an accurate current-sensing circuit. This paper proposes a lossless current-sensing technique to measure the inductor current by measuring the current through the power transistor. A self-trimming circuit is used to compensate for any inaccuracies caused by voltage and temperature variations. The measurement results validate the operation of the fabricated chip.
引用
收藏
页码：163 / 170
页数：7
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