A 1-mW solar-energy-harvesting circuit using an adaptive MPPT with a SAR and a counter

Hoonki Kim, Young Jae Min, Chan Hui Jeong, Kyu Young Kim, Chulwoo Kim, Soo Won Kim

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

This brief presents an energy-harvesting system that uses an adaptive maximum power point tracking (MPPT) circuit for 1-mW solar-powered wireless sensor networks. The proposed MPPT circuit exploits a successive approximation register and a counter to solve the tradeoff problem between a fast transient response and a small steady-state oscillation with low-power consumption. The proposed energy-harvesting circuit is fabricated using a 0.35-μm CMOS process. The MPPT circuit reduces the transient response time by 76.6%, dissipates only 110 μW , and shows MPPT efficiency of 99.6%.

Original languageEnglish
Article number6514479
Pages (from-to)331-335
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume60
Issue number6
DOIs
Publication statusPublished - 2013

Keywords

  • Energy harvesting
  • maximum power point tracking (MPPT)
  • solar cell
  • wireless sensor network (WSN)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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