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

Junyoung Maeng, Inho Park, Minseob Shim, Junwon Jeong, Chulwoo Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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 languageEnglish
Article number9165845
Pages (from-to)541-553
Number of pages13
JournalIEEE Journal of Solid-State Circuits
Volume56
Issue number2
DOIs
Publication statusPublished - 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

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