Open AccessA 43%@0.1V efficiency self-sustaining solar energy harvester in indoor lighting
Author(s) -
Deng-Bang Yu,
Xin-Ning Liu,
Jing Chen
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1311/1/012053
Subject(s) - electrical engineering , capacitor , voltage , boost converter , modulation (music) , dissipation , power (physics) , efficient energy use , computer science , electronic engineering , engineering , physics , quantum mechanics , acoustics , thermodynamics
This paper presents a self-sustaining solar energy harvester (EH) based on 130nm process, which consists of a low voltage cold start (CS) circuit and a high efficiency boost charger. The CS circuit makes the boost charger self-sustaining and start the boost circuit from the 100mV input. An adaptive switch frequency modulation (SFM) and switch capacitor modulation (SCM) are proposed to minimize the switch loss and conduction loss of boost charger, thus reduce overall circuit power consumption. The proposed boost charger utilizes a dual voltage technique for reducing the power dissipation of the internal circuit. The efficiency of the boost charger ranges from 43% at V IN = 100 mV to 65% at V IN = 300 mV .