An inductor-less MPPT design for light energy harvesting systems

Authors:
Hui Shao;Chi-Ying Tsui;Wing-Hung Ki
Affiliations:
The Hong Kong University of Science and Technology, Hong Kong SAR., P. R. China;The Hong Kong University of Science and Technology, Hong Kong SAR., P. R. China;The Hong Kong University of Science and Technology, Hong Kong SAR., P. R. China
Venue:
Proceedings of the 2009 Asia and South Pacific Design Automation Conference
Year:
2009

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Abstract

An inductor-less maximum power point tracker was designed for light energy harvesting systems. We target at systems under different lighting environments and sometimes the solar cell voltage may be low. A charge pump is used to convert the voltage to a higher value. At the same time, the control circuit tunes the charge pump switching frequency to track the system maximum output power point. The design was fabricated and measured to verify the system operation.