一种用于能量收集系统的开关电感变换器的超低功率零电流检测器电路

2017 IEEE Electrical Design of Advanced Packaging and Systems Symposium (EDAPS) Pub Date : 2017-12-01 DOI:10.1109/EDAPS.2017.8276949

Shiquan Fan, Zhongming Xue, Zhuoqi Guo, W. Gou, Xu Yang, Li Geng

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引用次数: 3

摘要

本文提出了一种超低功耗零电流检测器(ZCD)电路，该电路采用亚阈值设计方法和停止工作时间来降低功耗，可广泛应用于升压、降压或降压-升压等开关电感变换器。所设计的ZCD电路工作时仅消耗40 nA的静态电流，可实现近70 dB的直流增益和650 kHz的增益带宽。ZCD电路的主比较器具有高灵敏度和极低的延迟时间，可以准时关断DC-DC变换器的同步开关。在最小开关时间为1ms的情况下，工作时间仅为40 μs，平均静态电流消耗小于1.6 nA。最后，将设计的ZCD电路应用于振动能量收集的升压变换器中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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An ultra-low power (ULP) zero-current-detector (ZCD) circuit for switching inductor converter applied in energy harvesting system

In this paper, we present an ultra-low power (ULP) zero-current-detector (ZCD) circuit by using sub-threshold design method and discontinued operating time to decrease power consumption, which can be widely used in switching inductor converters such as boost, buck or buck-boost converters. The designed ZCD circuit consumes only 40 nA quiescent current to realize nearly 70 dB DC gain and 650 kHz gain-bandwidth (GBW) when it operates. The main comparator of the ZCD circuit has high sensitivity and very low delay time to turn-off the synchronous switches of the DC-DC converter on time. The average quiescent current consumption is less than 1.6 nA because the operating time is only 40 μs under the minimum switching period of 1 ms. Finally, the designed ZCD circuit is used in a boost converter for vibrational energy harvesting applications.

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来源期刊

2017 IEEE Electrical Design of Advanced Packaging and Systems Symposium (EDAPS)

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