A Novel Zero-Voltage-Detector for Buck Converter in Discontinuous Conduction Mode(DCM)

Meng Jia, Zhuochao Sun, L. Siek
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引用次数: 1

Abstract

This paper presents a Zero-Voltage-Detector (ZVD) circuit for buck converters working in discontinuous conduction mode (DCM). A novel comparator with pre-amplification property is proposed to provide fast sensing and comparison to optimize the switching timing of power transistors, hence minimizing the power losses caused by the reverse inductor current. The proposed DCM buck converter is fabricated using 0.18um CMOS technology with a chip area of 0.9mm 2. The simulated sensing delay of the proposed ZVD is only about 6ns. It achieves $\gt 85$% power efficiency for load currents of $\gt 10$ mA when the input and output voltages are 3.3V and 2.4V respectively.
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一种用于Buck变换器断续导通模式(DCM)的新型零电压检测器
本文提出了一种用于工作在不连续导通模式下的降压变换器的零电压检测器(ZVD)电路。提出了一种具有预放大特性的新型比较器,提供快速的传感和比较,优化功率晶体管的开关时间,从而最大限度地减少反向电感电流造成的功率损失。该DCM降压变换器采用0.18um CMOS工艺,芯片面积为0.9 mm2。所提出的ZVD的模拟传感延迟仅为6ns左右。当输入和输出电压分别为3.3V和2.4V时,负载电流为10 mA,功率效率为85 %。
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