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A Regulated Charge Pump With a Low-Power Integrated Optimum Power Point Tracking Algorithm for Indoor Solar Energy Harvesting
- Authors
- Kim, Jungmoon; Kim, Jihwan; Kim, Chulwoo
- Issue Date
- 12월-2011
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- 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)
- Citation
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, v.58, no.12, pp.802 - 806
- Indexed
- SCIE
SCOPUS
- Volume
- 58
- Number
- 12
- Start Page
- 802
- End Page
- 806
- ISSN
- 1549-7747
- 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.
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