A high voltage gain switched-capacitor DC-DC converter based on three parallel-connected Fibonacci converters

Author(s): Ratanaubol Rubpongsea*, Takaaki Ishibashib, Wanglok Doa, Farzin Asadic, Kei Eguchia
a Fukuoka Institute of Technology, Department of Information Electronics, Fukuoka, Japan
b National Institute of Technology, Kumamoto College, Department of Information, Communication and Electronic Engineering, Japan
c Kocaeli University, Department of Mechatronics Engineering, Kocaeli, Turkey
International Journal of Smart Grid and Clean Energy, vol. 9, no. 3, May 2020: pp. 625-634
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.9.3.625-634

Abstract: For use in energy harvesting systems with low voltages energy sources, this paper presents a high voltage gain converter using three parallel-connected Fibonacci converters. By using the parallel connected topology, the proposed converter can actualize a high voltage gain as the power of three. Moreover, owing to the parallel-connected structure, the total internal resistance is minimized. Therefore, the power efficiency of the proposed converter is better than that of traditional converters. Furthermore, unlike traditional converters, the step-up electric charge of the proposed converter is provided in all of the clock cycles. Hence, the proposed converter can connect with a small output capacitor, untroubled by ripple noise. For this reason, when the improved circuit is turned into a chip, the size of the proposed converter will be smaller than traditional converters.

Keywords: three parallel connected topologies; Fibonacci converters; switched-capacitor converters.
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