Title :
A Multiple-Input SC DC-DC Converter with Battery Charge Process
Author :
Eguchi, Kei ; Pongswatd, Sawai ; Zhu, Hongbing ; Tirasesth, Kitti ; Sasaki, Hirofumi ; Inoue, Takahiro
Author_Institution :
Dept. of Technol. Educ., Shizuoka Univ., Shizuoka, Japan
Abstract :
Aimed at a backlighting application, a multiple-input switched-capacitor (SC) DC-DC converter with battery charge process is proposed in this paper. Unlike conventional SC power converters such as a Dickson-type converter, etc., the proposed converter drives some LEDs by converting energy from solar cells when solar cells offer enough energy. Furthermore, the proposed converter can charge a lithium battery when an output load is light. Hence, the proposed converter enables us to realize long battery runtime. The validity of circuit design is confirmed by theoretical analyses, simulations, and experiments. The derived theoretical formulas will be helpful to estimate circuit characteristics, because theoretical results agree well with SPICE simulation results.
Keywords :
DC-DC power convertors; SPICE; power capacitors; secondary cells; Dickson-type converter; LED; SPICE simulation results; backlighting application; battery charge process; circuit design; converter drives; lithium battery; multiple-input SC DC-DC converter; multiple-input switched-capacitors DC-DC converter; solar cells; Analytical models; Batteries; Circuit simulation; Circuit synthesis; DC-DC power converters; Light emitting diodes; Lithium; Photovoltaic cells; Runtime; Switching converters; DC-DC converters; backlighting applications; battery charge; multiple-input converters; switched-capacitor circuits;
Conference_Titel :
Intelligent Networks and Intelligent Systems, 2009. ICINIS '09. Second International Conference on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-5557-7
Electronic_ISBN :
978-0-7695-3852-5
DOI :
10.1109/ICINIS.2009.178
