Abstract 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%.

中文翻译：

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具有非对称相移控制的交错式降压转换器

摘要 本文提出了一种新的控制算法来操作具有扩展降压比的交错式降压转换器。该算法是对两个有源开关的导通周期进行非对称相移，即部分重叠导通间隔。因此，有源开关之一可以受益于零电压开关 (ZVS)。这提高了硬开关交错降压转换器的电源效率。此外，输出电压是通过调整占空比来调节的，而不是改变开关频率。在本文中，设计并实现了一个 120 W 原型，输入电压范围为 54 至 84 V，输出电压为 24 V。根据实验结果，最高效率可达96%。