A 90.2% peak efficiency multi-input single-inductor multi-output energy harvesting interface with double-conversion rejection technique and buck-based dual-conversion mode

Hyunjin Kim, Junyoung Maeng, Inho Park, Jinwoo Jeon, Dongju Lim, Chulwoo Kim

Research output: Contribution to journalArticlepeer-review

Abstract

This article presents a multi-input single-inductor multi-output energy-harvesting interface that extracts power from three independent sources and regulates three output voltages. The converter employs the proposed double-conversion rejection technique to reduce the double-converted power by up to 81.8% under the light-load condition and operates in various power conversion modes, including the proposed buck-based dual-conversion mode, to improve the power conversion efficiency and maximum load power. The proposed adaptive peak inductor current controller determines the inductor charging period, and the proposed digitally controlled zero-current detector detects the optimum zero-current point according to the operating mode. The proposed converter achieves a peak end-to-end efficiency of 90.2% and a maximum output power of 24 mW, indicating the improvements of approximately 7.52% and 1.85 times, respectively, compared with those of conventional buck-boost converters.

Original languageEnglish
Article number9212601
Pages (from-to)961-971
Number of pages11
JournalIEEE Journal of Solid-State Circuits
Volume56
Issue number3
DOIs
Publication statusPublished - 2021 Mar

Keywords

  • Buck-based dual-conversion (BBDC)
  • dc-dc converter
  • double-conversion rejection technique (DCRT)
  • energy harvesting (EH)
  • Internet of Things
  • multiple inputs
  • multiple outputs

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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