Single-Inductor, Dual-Input CCM Boost Converter for Multi-Junction PV Energy Harvesting

• Other Authors: Peng, Qirong (Author)
• Format: Dissertation
• Language: English
• Published: 2017
• Subjects: Engineering
• Online Access: http://hdl.handle.net/2286/R.I.44995

abstract: 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. === Dissertation/Thesis === Masters Thesis Engineering 2017