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Design and implementation of interleaved quasi-resonant DC-DC flyback converter

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4 Author(s)
Zi-Shiuan Ling ; Department of Electrical Engineering, National Cheng-Kung University Tainan, Taiwan, R. O. C. ; Tsorng-Juu Liang ; Lung-Sheng Yang ; Tzuu-Hseng Li

This paper presents the interleaved quasi-resonant (QR) DC-DC flyback converter, which uses two parallel-connection DC-DC flyback converters. The interleaved technique is used to control the active switches of the two flyback converters. Also, the active switches are turned on at voltage-valley condition to reduce switching losses. Thus, this converter can achieve large output power, low output-current ripple, and high efficiency. The operating principle is discussed. Finally, a prototype circuit with input voltage 300-400 V, output voltage 24 V, and output current 8.33 A is implemented to verify the performance.

Published in:

2009 International Conference on Power Electronics and Drive Systems (PEDS)

Date of Conference:

2-5 Nov. 2009