A 42nJ/conversion on-demand state-of-charge indicator for miniature IoT Li-ion batteries

Junwon Jeong, Seokhyeon Jeong, Chulwoo Kim, Dennis Sylvester, David Blaauw

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

An energy efficient State-of-Charge (SOC) indication algorithm and integrated system for small IoT batteries are introduced in this paper. The system is implemented in a 180-nm CMOS technology. Based on a key finding that small Li-ion batteries exhibit a linear dependence between battery voltage and load current, we propose an instantaneous linear extrapolation (ILE) algorithm and circuit allowing on-demand estimation of SOC. Power consumption is 42nW and maximum SOC indication error is 1.7%.

Original languageEnglish
Title of host publication2017 Symposium on VLSI Circuits, VLSI Circuits 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
PagesC206-C207
ISBN (Electronic)9784863486065
DOIs
Publication statusPublished - 2017 Aug 10
Event31st Symposium on VLSI Circuits, VLSI Circuits 2017 - Kyoto, Japan
Duration: 2017 Jun 52017 Jun 8

Other

Other31st Symposium on VLSI Circuits, VLSI Circuits 2017
CountryJapan
CityKyoto
Period17/6/517/6/8

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Jeong, J., Jeong, S., Kim, C., Sylvester, D., & Blaauw, D. (2017). A 42nJ/conversion on-demand state-of-charge indicator for miniature IoT Li-ion batteries. In 2017 Symposium on VLSI Circuits, VLSI Circuits 2017 (pp. C206-C207). [8008484] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/VLSIC.2017.8008484