A Time-Based Direct MPPT Technique for Low-Power Photovoltaic Energy Harvesting

Junyoung Maeng, Junwon Jeong, Inho Park, Minseob Shim, Chulwoo Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


This letter introduces a maximum power point tracking (MPPT) technique for photovoltaic (PV) energy harvesting (EH) systems to enhance the end-to-end efficiency (ηE-E) when the output power of PV cell (PPV,MAX) is low. A ripple-based PV cell current sensing and a time-domain multiplication are proposed to monitor the PV cell power delivered to the charger, which reduces the controller power consumption (PCTR). The PV EH system with the proposed MPPT method is implemented in a 180-nm CMOS process. The PCTR is 1.34 μW. The measured ηE-E at low PPV,MAX (13 μW) is 88%. The measured peak ηE-E is 94.4% at 82 μW.

Original languageEnglish
Pages (from-to)5375-5380
Number of pages6
JournalIEEE Transactions on Industrial Electronics
Issue number5
Publication statusPublished - 2024 May 1

Bibliographical note

Publisher Copyright:
© 1982-2012 IEEE.


  • Low-power energy harvesting
  • maximum power point trackers (MPPT)
  • time-based (TB) MPPT

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering


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