A regulated charge pump with a low-power integrated optimum power point tracking algorithm for indoor solar energy harvesting

Jungmoon Kim, Jihwan Kim, Chulwoo Kim

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

This brief presents a regulated charge pump (CP) with an integrated optimum power point tracking (OPPT) algorithm designed for indoor solar energy harvesting. The proposed OPPT circuit does not require a current sensor that consumes power proportionally to the load. The solar cell voltage is regulated at the optimum power point; the CP output is regulated according to the target voltage. The controller of the OPPT circuit and CP dissipates only 450 nW; thus, the proposed technique is appropriate for indoor solar energy harvesting applications under dim lighting conditions.

Original languageEnglish
Article number6082411
Pages (from-to)802-806
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume58
Issue number12
DOIs
Publication statusPublished - 2011 Dec

Keywords

  • Battery charger
  • Charge pump (CP)
  • Maximum power point tracking (MPPT)
  • Optimum power point tracking (OPPT)
  • Photovoltaic (PV) systems
  • Solar energy harvesting
  • Wireless sensor networks (WSNs)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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