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 language | English |
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Article number | 6082411 |
Pages (from-to) | 802-806 |
Number of pages | 5 |
Journal | IEEE Transactions on Circuits and Systems II: Express Briefs |
Volume | 58 |
Issue number | 12 |
DOIs | |
Publication status | Published - 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