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 |
|---|---|
| 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