期刊
IEEE JOURNAL OF SOLID-STATE CIRCUITS
卷 54, 期 10, 页码 2671-2679出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2019.2917549
关键词
Automatic source selection; buck-boost converter; dc-dc converter; energy harvesting; reversely polarized energy recycling (RPER)
资金
- Ministry of Science and Technology (MOST), Taiwan [107-2221-E-009-133 MY2, 107-2622-8-009-009-TA, 108-2636-E-009-009]
- Center for Neuromodulation Medical Electronics Systems from The Featured Areas Research Center Program within the Ministry of Education (MoE) in Taiwan
This paper presents a single-inductor triple-source quad-mode (SITSQM) energy-harvesting interface in a 0.18-mu m CMOS process. The proposed reversely polarized energy recycling (RPER) technique improves not only the conversion efficiency at low input voltage but also the system's output power range. The interface employs the buck-boost topology to convert energy from photovoltaic (PV) cells and a thermoelectric generator (TEG) to a regulated 1.2-V output. The proposed converter features four different operating modes, namely, harvesting, recycling, storing, and backup. The operating mode is automatically selected according to the input and load conditions using the automatic source selection mechanism. The experimental results demonstrate 25.3% efficiency improvement and 10x output power range extension from the proposed RPER technique. The proposed SITSQM converter automatically manages three harvesting sources with 82.1% peak conversion efficiency.
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