This paper proposed a new two-phase high step-down DC–DC converter is proposed. This converter is derived from the two-phase series-capacitor converter. The proposed converter replaces the series capacitor with a new structure that integrates Valley-Fill circuit and coupled-inductors concepts. This replacement can improve the voltage gain of the converter as well as a considerable reduction of diodes voltage stress. The proposed structure implements a dual-phase buck using a single magnetic element. Also, the proposed structure inherently limits the voltage spikes due to the leakage inductance of coupled inductors without any additional clamp circuit. The proposed converter is analyzed, and design guidelines are provided. A 300–24 V prototype converter is implemented to justify the validity of circuit operation and the theoretical analysis.

中文翻译：

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具有单个磁性元件和固有钳位电压能力的极高降压耦合电感器两相降压转换器

本文提出了一种新型两相高降压DC-DC变换器。该变换器源自两相串联电容器变换器。所提出的转换器用集成了填谷电路和耦合电感器概念的新结构取代了串联电容器。这种替代可以提高转换器的电压增益，并显着降低二极管的电压应力。所提出的结构使用单个磁性元件实现双相降压。此外，所提出的结构本质上限制了由于耦合电感器的漏感而导致的电压尖峰，而无需任何额外的钳位电路。对所提出的转换器进行了分析，并提供了设计指南。采用 300–24 V 原型转换器来证明电路运行和理论分析的有效性。