Analytical Study of Multi-stage Switched-Capacitor Voltage Boost Converter for Ultra-low Voltage Energy Harvesting

An analytical study of a multi-stage switched-capacitor (SC) voltage boost converter (VBC) for ultra-low voltage energy harvesting is presented. Because the output impedance of the VBC plays an important role in the VBC's performance, we developed an analytical model to achieve a highly efficie...

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Bibliographic Details
Published in2018 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 1 - 5
Main Authors Nakazawa, Yuichiro, Hirose, Tetsuya, Ozaki, Toshihiro, Tsuji, Yuto, Kanzaki, Shuto, Asano, Hiroki, Kuroki, Nobutaka, Numa, Masahiro
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.01.2018
Subjects
Capacitance
Clocks
Frequency-domain analysis
Impedance
Load modeling
Time-domain analysis
Topology
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Summary:An analytical study of a multi-stage switched-capacitor (SC) voltage boost converter (VBC) for ultra-low voltage energy harvesting is presented. Because the output impedance of the VBC plays an important role in the VBC's performance, we developed an analytical model to achieve a highly efficient VBC. In our proposed method, we focus on currents flowing into input and output terminals of each stage and model the VBCs using switching frequency f, charge transfer capacitance Cf, and load capacitance CL. A comparison between simulated and calculated results showed that our model can estimate the output impedance of the VBC accurately. Our model is useful to compare the relative merits of different types of multi-stage SC VBCs.
ISSN:2379-447X
DOI:10.1109/ISCAS.2018.8351466