A Three-Switch Single-Inductor Dual-Input Buck/Boost Converter for Light Energy Harvesting

  • 陳 玄儒

學生論文: Master's Thesis

摘要

The design and analysis of energy harvesting (EH) for consumer electronics such as wireless sensor networks (WSNs) is presented in this thesis The system can be powered by ambient energy in conjunction with rechargeable batteries to achieve near-perpetual operation One common solution is to harvest energy from ambient light through photovoltaic (PV) modules In such a system a battery acts as the backup source to supplement energy when the environment’s power provision is insufficient or when the WSN is active and stores surplus energy for future use when the WSN is inactive Accordingly power management in an EH system involves a balance among the PV module battery and load Compared to traditional methods which use two stage dc-dc converter or multi-input multi-output topology an energy-recycling concept is proposed and the corresponding converter is implemented in this thesis It uses fewer switches to balance the power among three elements Additionally the sizes of switches are optimized for reducing power losses Consequently compared with state-of-the-arts both the power loss and chip area can be simultaneously reduced Finally the corresponding voltage regulator with maximum power point tracking are also proposed in this thesis The proposed EH integrated circuit (IC) is fabricated with TSMC 0 35μm 2P4M 3 3V/5V Mixed-Signal CMOS process The total chip area is 0 79mm2 and the active area is 0 5mm2 which is at least less than 30% compared to state-of-the-arts Measured result shows that this IC features 93% peak conversion efficiency which is 12% higher compared to state-of-the-arts Moreover this work also has higher efficiency over the entire load power range than current state-of-the-arts to meet the power- and volume-efficient requirements of WSNs
獎項日期2014 十一月 25
原文English
監督員Tai-Haur Kuo (Supervisor)

引用此

A Three-Switch Single-Inductor Dual-Input Buck/Boost Converter for Light Energy Harvesting
玄儒, 陳. (Author). 2014 十一月 25

學生論文: Master's Thesis