A 500nW-50μ W Indoor Photovoltaic Energy Harvester with Multi-mode MPPT
Journal
2020 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2020
Date Issued
2020
Author(s)
Abstract
A 500nW-50 \mu \mathrm{W} indoor photovoltaic energy harvester is presented with a multi-mode maximum power point tracking (MPPT) circuit. Three switched-capacitor DC-DC converters (SCDCs) with different switch sizes and flying capacitors are realized. A multi-mode MPPT circuit is presented to tune the voltage conversion ratios and the switching frequency of the SCDCs. In addition, this multi-mode MPPT circuit also utilizes three reconfigurable SCDCs to cover the input power range of 500nW \sim 50 \mu \mathrm{W}. This indoor photovoltaic energy harvester is realized in a 0.18m CMOS process and its active area is 1.15mm2. The measured peak power conversion efficiency is 64.4%. ? 2020 IEEE.
Subjects
Conversion efficiency; Energy harvesting; Maximum power point trackers; Switching frequency; VLSI circuits; Flying capacitor; Input power; Maximum Power Point Tracking; Photovoltaic energy; Reconfigurable; Switch size; Switched-capacitor dc-dc converter; Voltage conversion ratio; DC-DC converters
SDGs
Other Subjects
Conversion efficiency; Energy harvesting; Maximum power point trackers; Switching frequency; VLSI circuits; Flying capacitor; Input power; Maximum Power Point Tracking; Photovoltaic energy; Reconfigurable; Switch size; Switched-capacitor dc-dc converter; Voltage conversion ratio; DC-DC converters
Type
conference paper