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A High-Voltage Dual-Input Buck Converter With Bidirectional Inductor Current for Triboelectric Energy-Harvesting Applications

Authors
Maeng, JunyoungPark, InhoShim, MinseobJeong, JunwonKim, Chulwoo
Issue Date
2월-2021
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords
Buck converter; dc-dc converter; dual input (DI); energy harvesting (EH); high-voltage (HV) sampling; inductor sharing; three-level gate driver (TLGD); triboelectric nanogenerator (TENG)
Citation
IEEE JOURNAL OF SOLID-STATE CIRCUITS, v.56, no.2, pp.541 - 553
Indexed
SCIE
SCOPUS
Journal Title
IEEE JOURNAL OF SOLID-STATE CIRCUITS
Volume
56
Number
2
Start Page
541
End Page
553
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/49697
DOI
10.1109/JSSC.2020.3012991
ISSN
0018-9200
Abstract
This article presents a high-voltage (HV) dual-input buck converter with a bidirectional inductor current ( IL) and a fully integrated maximum power point tracking circuit for triboelectric (TE) energy-harvesting applications. The proposed converter regulates HV inputs through a single shared inductor, and HV inputs can be isolated without using an additional HV protection circuit. In addition, the proposed diode-based HV sampling circuit can accomplish high ac voltage sampling and peak detection to perform the fractional open-circuit voltage method without any external components. Fabricated using a 180-nm bipolar-CMOS-DMOS (BCD) process, the proposed system with a self-manufactured polytetrafluroethylene (PTFE)based TE nanogenerator can regulate two HV inputs up to 70 V and achieve a power conversion efficiency of 84.7% and an end-to-end efficiency of 75.6%, which are 30.2% and 22.7% better than prior work, respectively.
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