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低功耗无损电流检测技术的分析与设计
引用本文:刘布民,蔡伟,陆铁军,王宗民. 低功耗无损电流检测技术的分析与设计[J]. 电子科技大学学报(自然科学版), 2008, 37(3): 393-396
作者姓名:刘布民  蔡伟  陆铁军  王宗民
作者单位:电子科技大学微电子与固体电子学院成都,610054;北京微电子技术研究所北京丰台区,100076
摘    要:通过分析DC-DC电流模开关电源的结构,提出了一种新颖的低功耗无损电流检测技术,降低了开关电源的静态功耗。该技术实现了"虚拟"的无损电流检测电阻和一个低功耗高灵敏度的电流检测放大器。通过降低电流检测电路的功耗,优化了电流模开关电源控制环路的功耗,从而实现了静态功耗的最小化。基于无损电流检测技术设计,开关电源的静态功耗为61.22 mW,为典型情况的57.5%。

关 键 词:电流模  开关电源  无损电流检测  低功耗电流检测  寄生电阻
收稿时间:2007-11-24
修稿时间:2007-11-24

Low-Power Lossless Current Sensing in DC/DC Converter
LIU Bu-min,CAI Wei,LU Tie-jun,WANG Zong-min. Low-Power Lossless Current Sensing in DC/DC Converter[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(3): 393-396
Authors:LIU Bu-min  CAI Wei  LU Tie-jun  WANG Zong-min
Affiliation:1.School of Microelectronics and Solid-State Electronics,University of Electronic Science and Technology of China Chengdu 6100541;2.Beijing Microelectronics Technology Institute Fengtai Beijing 100076
Abstract:By analyzing the architecture of current mode DC-DC converter, a novel lossless low-power current-sensing technique for minimizing the static power of DC-DC converter is proposed in the paper. It adopts a lossless current-sensing method and an improved low power current amplifier. The proposed technique can reduce the power of current-sensing circuit and result in the static power optimization of current mode DC-DC converter. Simulation results show that static power of the current mode buck converter based on the proposed technique is 61.22mW, which is only 57.5% compared to the converter with the typical circuit.
Keywords:
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