A 12 mV Input, 90.8% Peak Efficiency CRM Boost Converter With a Sub-Threshold Startup Voltage for TEG Energy Harvesting

被引:38
作者
Mu, Junchao [1 ]
Liu, Lianxi [1 ]
机构
[1] Xidian Univ, Sch Microelect, Xian 710071, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Boost converter; cold start; low power; TEG energy harvester; SINGLE-INDUCTOR; POWER; DESIGN; CMOS; TRANSCEIVER; INTERFACE; SOLAR; MPPT; LOOP; DBM;
D O I
10.1109/TCSI.2018.2789449
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper proposed a high efficiency boost converter targeting thermoelectric generator energy harvesting. The proposed converter adopts the critical conduction mode rather than the discontinuous mode to reduce the conduction loss, which can improve the peak efficiency at high input power. To reduce the minimum input voltage, an adaptive on-resistance switch, which can automatically change the high side and low side on-resistance according to the input voltage, is used. To maximize the output power, a maximum power point tracking circuit is designed to track the internal source resistance. Radio frequency (RF) kick-up and low voltage startup are used to improve the cold start voltage. The proposed converter is implemented in a 0.18-mu m standard CMOS process, which occupies a chip area of about 0.48 mm(2). Measurement results show that the peak efficiency of the converter can be up to 90.8% and 60% at 180 and 20 mV of the open-circuit voltage, respectively. Owing to the cold startup circuit, the proposed converter can start successfully with 260-mV open-circuit voltage or -16-dBm RF input. Moreover, the open-circuit voltage can be further lowered to 12 mV with 1.5-mu W output power after startup.
引用
收藏
页码:2631 / 2640
页数:10
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