| 一种新的应用于降压式DC-DC变换器电流采样电路的设计 |
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| 引用本文： | 皮常明,徐翊华,周文君,王晓南,李文宏.一种新的应用于降压式DC-DC变换器电流采样电路的设计[J].固体电子学研究与进展,2010,30(2). |
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| 作者姓名： | 皮常明 徐翊华 周文君 王晓南 李文宏 |
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| 作者单位： | 1. 复旦大学专用集成电路与系统国家重点实验室,上海,201203
2. 中国人民解放军63883部队,河南,洛阳,471000 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 在分析了传统的应用于大负载电流降压式DC-DC变换器电流采样电路主要缺点的基础上,提出一种新的应用于降压式DC-DC变换器的电流采样电路。该方法通过一个电阻电容网络来消除电感寄生电阻的影响,并利用开关电容积分器来实现降压式DC-DC变换器的电流采样,在Chartered 0.35μm CMOS工艺下实现该电路并流片验证。最终的测试结果显示,提出的电流采样电路实现了对降压式DC-DC变换器精确的电流采样。
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| 关 键 词： | 降压式DC-DC变换器 电流采样 开关电容积分器 |
A New Current-sensing Circuit Applied in Buck DC-DC Converter |
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| PI Changming,XU Yihua,ZHOU Wenjun,WANG Xiaonan,LI Wenhong.A New Current-sensing Circuit Applied in Buck DC-DC Converter[J].Research & Progress of Solid State Electronics,2010,30(2). |
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| Authors: | PI Changming XU Yihua ZHOU Wenjun WANG Xiaonan LI Wenhong |
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| Abstract: | Based on analyzing the reported current-sensing circuit of high-load Buck DC-DC converter,this paper describes a novel current-sensing circuit,which mainly includes a resistor-capacitor network and switched-capacitor integrator. The resistor-capacitor network is used to eliminate the influence of the parasitic resistor of the inductor,and the switched-capacitor integrator is adopted to realize the current sensing of Buck DC-DC converter.The proposed current-sensing circuit of Buck DC-DC converter has been designed and fabricated in Chartered 0.35 μm CMOS process and the measured results show that the circuit presented in this paper can realize current-sensing of Buck DC-DC converter exactly. |
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| Keywords: | Buck DC-DC converter current sensing switched-capacitor integrator |
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