Transformerless DC-DC converters with a very high DC line-to-load voltage ratio

Author

Axelrod, B. ; Berkovich, Y. ; Ioinovici, A.

Author_Institution

Dept. Electr. & Electron. Eng., Holon Acad. Inst. of Technol., Israel

Volume

3

fYear

2003

fDate

25-28 May 2003

Abstract

By splitting the output capacitor of a basic boost converter, and combining the resulting capacitors with the main switch in the form of a switched-capacitor circuit, a new step-up structure is realized. Without using a transformer, a high line-to-load DC voltage ratio is obtained. An output filter is added as usual in boost converters for getting a free-ripple output. The circuit compares favorably with a quadratic boost converter as regarding the count of devices and efficiency, even if it presents a lower DC gain. A DC analysis of the novel converter is presented. Experimental and simulation results confirm the theoretical expectations. By increasing the number of capacitors in the switched-capacitor circuit, higher gains are obtained. Versatility, high voltage gain and a good transient response are the features of the proposed converter.

Keywords

DC-DC power convertors; switched capacitor networks; transient response; DC analysis; DC gain; DC line-to-load voltage ratio; boost converter; free-ripple output; line-to-load DC voltage ratio; output capacitor; output filter; step-up structure; switched-capacitor circuit; transformerless DC-DC converters; transient response; Circuit simulation; DC-DC power converters; Diodes; Inductors; Steady-state; Switched capacitor circuits; Switches; Switching circuits; Switching converters; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1205049

Filename

1205049