A 96.5%-Power-Efficiency Hybrid Buck-Boost Photovoltaic Energy Harvester Employing Adaptive FOCV MPPT Control for >98% MPPT Efficiency Across a 10,000× Dynamic Range

Phan Dang Hung, Hongseok Shin, Yechan Park, Nguyen Kim Hoang, Donghee Cho, Sohmyung Ha, Chul Kim, Minkyu Je

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

Abstract

We present a photovoltaic (PV) energy harvesting (EH) system achieving both high maximum-power-point-tracking efficiency (MPPT) and high power-conversion efficiency (CONV) in an ultra-wide input power (PIN) range. Instead of a complex and power-hungry hybrid MPPT, an MPPT based on an adaptive fractional open-circuit voltage (FOCV) method is used to tune the fraction k based on PIN with little power overhead. Also, a hybrid topology is modified to work as a buck-boost converter to maintain high CONV at low PIN by combining three different control techniques. Zero-current-detection (ZCD) is performed with actively changing the tuning resolution to reduce control bit size and response time.

Original languageEnglish (US)
Title of host publication2022 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages200-201
Number of pages2
ISBN (Electronic)9781665497725
DOIs
StatePublished - 2022
Event2022 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2022 - Honolulu, United States
Duration: Jun 12 2022Jun 17 2022

Publication series

NameDigest of Technical Papers - Symposium on VLSI Technology
Volume2022-June
ISSN (Print)0743-1562

Conference

Conference2022 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2022
Country/TerritoryUnited States
CityHonolulu
Period6/12/226/17/22

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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