A micro power management system and maximum output power control for solar energy harvesting applications

Authors:
Hui Shao;Chi-Ying Tsui;Wing-Hung Ki
Affiliations:
The Hong Kong University of Science and Technology;The Hong Kong University of Science and Technology;The Hong Kong University of Science and Technology
Venue:
ISLPED '07 Proceedings of the 2007 international symposium on Low power electronics and design
Year:
2007

Citing 2
Cited 5

Maximizing efficiency of solar-powered systems by load matching

Proceedings of the 2004 international symposium on Low power electronics and design
Eco: an ultra-compact low-power wireless sensor node for real-time motion monitoring

IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks

Analysis and design of ultra low power thermoelectric energy harvesting systems

Proceedings of the 16th ACM/IEEE international symposium on Low power electronics and design
Comparison of energy intake prediction algorithms for systems powered by photovoltaic harvesters

Microelectronics Journal
Efficient power conversion for ultra low voltage micro scale energy transducers

Proceedings of the Conference on Design, Automation and Test in Europe
Maximizing the harvested energy for micro-power applications through efficient MPPT and PMU design

Proceedings of the 2010 Asia and South Pacific Design Automation Conference
Modeling, design and cross-layer optimization of polysilicon solar cell based micro-scale energy harvesting systems

Proceedings of the 2012 ACM/IEEE international symposium on Low power electronics and design

Quantified Score

Hi-index	0.00

Visualization

Abstract

A micro power management system is presented for solar energy harvesting applications. An inductor-less solution is proposed which facilitates on-chip integration of the system. We target at applications working in different lighting environments ranging from strong sunlight to dim indoor lighting where the output voltage from the photovoltaic (PV) cells is low. A charge pump is used to step the PV voltage up to charge a battery or directly operate the circuit. The power management system behavior is theoretically analyzed and the control strategy is derived to transfer maximum power from the PV cells to the battery or the circuit. Circuit design and low power techniques for the maximum output power control are proposed for the system. The system was implemented using 0.35μm CMOS process. With the measured PV cells output characteristics, HSPICE simulations for the power management system were carried out to verify the control strategy and to demonstrate the system operation.