A Loss Minimization Analysis in a New Interleaved DC-DC Buck Converter with Very High Step-Down Ratio

Vecchia, Mauricio Dalla; Ravyts, Simon; Broeck, Giel Van den; Hallemans, L.; Tant, Jeroen; Driesen, Johan

doi:10.1109/compel.2019.8769711

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2024

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“…In a two-phase seriescapacitor (SC) converter, the output ripple is reduced and equal to a four-phase buck converter [19]. Replacing the series capacitor with a Valley-Fill structure improves the conversion ratio, and the main switch's voltage stress reduces [20,21]. Two interleaved high step-down structures are introduced in [22,23].…”

Section: Introductionmentioning

confidence: 99%

Very high step‐down coupled inductor two‐phase buck converter with single magnetic element and inherent clamp voltage capability

Esfahani,

Adib

2024

IET Power Electronics

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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.

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