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

27 Citations (Scopus)

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

Bibliographical note

Funding Information:
Manuscript received March 15, 2020; revised July 28, 2020; accepted September 13, 2020. Date of publication October 5, 2020; date of current version February 24, 2021. This article was approved by Guest Editor Wing-Hung Ki. This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea Government (MSIT) 2019R1A2B5B03100756. The chip fabrication and EDA tool were supported by the IC Design Education Center (IDEC), South Korea. (Corresponding author: Chulwoo Kim.) The authors are with the Department of Electrical Engineering, Korea University, Seoul 02841, South Korea (e-mail: [email protected]).

Publisher Copyright:
© 1966-2012 IEEE.

Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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