Low start-up voltage dc–dc converter with negative voltage control for thermoelectric energy harvesting

The Journal of Engineering

Robert Chen-Hao Chang¹  Ming-Shiun Lee¹  Pui-Sun Lei¹  Chu-Hsiang Chia¹ 

[1] Department of Electrical Engineering, National Chung Hsing University, Taichung, Taiwan

关键词: current 1.5 mA;    low start-up voltage DC-DC converter;    low-power thermoelectric systems;    start-up switch;    thermoelectric energy harvesting;    voltage 300 mV;    thermoelectric generator;    native n-type MOS transistor;    negative voltage control;    0.18 μm CMOS process;    current 3.2 mA;    leakage current reduction;    peak efficiency;   

DOI  :  10.1049/joe.2014.0252

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

This Letter presents a low start-up voltage dc–dc converter for low-power thermoelectric systems which uses a native n-type MOS transistor as the start-up switch. The start-up voltage of the proposed converter is 300 mV and the converter does not need batteries to start up. The negative voltage control is proposed to reduce the leakage current caused by native n-type transistor and increase the efficiency. The proposed converter was designed using standard 0.18 µm CMOS process with chip size of 0.388 mm2. The peak efficiency is 63% at load current of 1.5 mA. The proposed converter provides output voltage >1 V at maximum load current of 3.2 mA.

【 授权许可】

CC BY