Abstract
This article presents a high-voltage (HV) dual-input buck converter with a bidirectional inductor current (I L) 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.
Original language | English |
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Article number | 9165845 |
Pages (from-to) | 541-553 |
Number of pages | 13 |
Journal | IEEE Journal of Solid-State Circuits |
Volume | 56 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2021 Feb |
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)
ASJC Scopus subject areas
- Electrical and Electronic Engineering