Title :
A 0.21-V minimum input, 73.6% maximum efficiency, fully integrated 3-terminal voltage converter with MPPT for low-voltage energy harvesters
Author :
Ozaki, Toshihiro ; Hirose, Tetsuya ; Nagai, Takahiro ; Tsubaki, Keishi ; Kuroki, Nobutaka ; Numa, Masahiro
Author_Institution :
Dept. of Electr. & Electron. Eng., Kobe Univ., Kobe, Japan
Abstract :
We propose a fully integrated 3-terminal voltage converter with a maximum power point tracking (MPPT) circuit for ultra-low voltage energy harvesting. The MPPT circuit dissipates nano-watt power to extract maximum output power. The measurement results demonstrated that the circuit converted a 0.49-V input to a 1.46-V output with 73.6% power conversion efficiency when the output power was 348 μW. The circuit can operate at an extremely low input voltage of 0.21 V.
Keywords :
energy harvesting; maximum power point trackers; power integrated circuits; MPPT circuit; fully integrated 3-terminal voltage converter; maximum output power extraction; maximum power point tracking; nanowatt power dissipation; power 348 muW; power conversion efficiency; ultra low-voltage energy harvester; voltage 0.21 V; Accuracy; Clocks; Current measurement; Maximum power point trackers; Voltage measurement; Voltage-controlled oscillators;
Conference_Titel :
Design Automation Conference (ASP-DAC), 2015 20th Asia and South Pacific
Conference_Location :
Chiba
Print_ISBN :
978-1-4799-7790-1
DOI :
10.1109/ASPDAC.2015.7058931
