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Four Switch Buck-Boost Converter for Telecom DC-DC power supply applications

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5 Author(s)
Xiaoyong Ren ; Aero-Power Sci-tech Center, Nanjing University of Aeronautics and Astronautics, 210016, Jiangsu Province, China ; Zhao Tang ; Xinbo Ruan ; Jian Wei
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Converters for telecom DC/DC power supply applications often require an output voltage somewhere within a wide range of input voltages. While the design of traditional converters will come with a heavy penalty in terms of component stresses and losses, and with the restrictions on the output voltage. Besides that, the high efficiency around the nominal input is another restriction for traditional converters. A controlling scheme for the four switch buck-boost converter is proposed to achieve high efficiency within the line range and the highest efficiency around the nominal input. A 48 V(36-75 V) input 12 V@25 A output two-stage prototype composed of the proposed converter and a full bridge converter is built in the lab. The experimental results verified the analysis.

Published in:

Applied Power Electronics Conference and Exposition, 2008. APEC 2008. Twenty-Third Annual IEEE

Date of Conference:

24-28 Feb. 2008