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This thesis presents a power harvesting system combining energy from sub-cells of
multi-junction photovoltaic (MJ-PV) cells. A dual-input, inductor time-sharing boost
converter in continuous conduction mode (CCM) is proposed. A hysteresis inductor current
regulation in designed to reduce cross regulation caused by inductor-sharing in CCM. A
modified hill-climbing algorithm is implemented to achieve maximum power point
tracking (MPPT). A dual-path architecture is implemented to provide a regulated 1.8V
output. A proposed lossless current sensor monitors transient inductor current and a time-based power monitor is proposed to monitor PV power. The PV input provides power of
65mW. Measured results show that the peak efficiency achieved is around 85%. The
power switches and control circuits are implemented in standard 0.18um CMOS process.
multi-junction photovoltaic (MJ-PV) cells. A dual-input, inductor time-sharing boost
converter in continuous conduction mode (CCM) is proposed. A hysteresis inductor current
regulation in designed to reduce cross regulation caused by inductor-sharing in CCM. A
modified hill-climbing algorithm is implemented to achieve maximum power point
tracking (MPPT). A dual-path architecture is implemented to provide a regulated 1.8V
output. A proposed lossless current sensor monitors transient inductor current and a time-based power monitor is proposed to monitor PV power. The PV input provides power of
65mW. Measured results show that the peak efficiency achieved is around 85%. The
power switches and control circuits are implemented in standard 0.18um CMOS process.
ContributorsPeng, Qirong (Author) / Kiaei, Sayfe (Thesis advisor) / Bakkaloglu, Bertan (Committee member) / Ogras, Umit Y. (Committee member) / Arizona State University (Publisher)
Created2017