An interleaved buck converter with asymmetric phase-shift control

作者：Hsieh, Yao Ching^*; Huang, Chien Chun; Lin, Jing Yuan; Chao, Tse Wei; Chiu, Huang Jen

来源：EPE Journal, 2018, 28(4): 151-158.

DOI：10.1080/09398368.2018.1467152

• Asymmetric phase-shift
• interleaved buck converter
• zero-voltage-switching

This paper proposes a new control algorithm to operate an interleaved buck converter with an extended step-down ratio. The algorithm is to asymmetrically phase-shift the turn-on periods of the two active switches, i.e. partially overlapping the turn-on intervals. Therefore, one of the active switches can benefit from zero-voltage-switching (ZVS). This improves the power efficiency of a hard-switched interleaved buck converter. In addition, the output voltage is regulated by adjusting the duty ratio, instead of varying the switching frequency. In this paper, a 120 W prototype with input voltage ranging from 54 to 84 V and output voltage of 24 V is designed and implemented. According to the experimental results, the highest efficiency is up to 96%.

• 出版日期2018
• 单位中山大学