Design of a Multiple-Input SC DC-DC Converter Realizing Long Battery Runtime

Kei EGUCHI  Sawai PONGSWATD  Amphawan JULSEREEWONG  Kitti TIRASESTH  Hirofumi SASAKI  Takahiro INOUE  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E93-A   No.5   pp.985-988
Publication Date: 2010/05/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E93.A.985
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Circuit Theory
Keyword: 
DC-DC converters,  switched-capacitor circuits,  back-lighting applications,  clean energy,  

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Summary: 
A multiple-input switched-capacitor DC-DC converter which can realize long battery runtime is proposed in this letter. Unlike conventional converters for a back-lighting application, the proposed converter drives some LEDs by converting energy from solar cells. Furthermore, the proposed converter can charge a lithium battery when an output load is light. The validity of circuit design is confirmed by theoretical analyses, simulations, and experiments.