Behzad Soleymani;Omidreza Bagheri;Ehsan Adib;Suzan Eren
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引用次数: 0
摘要
本文提出了一种具有超低输出电流纹波和高电压衰减的新型同步整流转换器。该转换器无需任何额外的有源元件即可实现软开关,从而在保持传统转换器简洁性的同时实现了高效率。所提电路的其他主要特点包括固有的击穿保护、耦合电感器导致的半导体电流应力减小以及低端 MOSFET 上的电压应力较低。此外,电路还采用了脉冲频率调制控制方案,从而扩大了软开关范围,在轻负载时不会产生过大的循环电流。本文介绍了 120 W 原型的稳态分析和实验结果。
A ZVS High Step-Down Converter With Reduced Component Count and Low Ripple Output Current
In this paper, a new synchronous rectified converter with ultra-low output current ripple and high voltage attenuation is proposed. The presented converter can achieve soft switching without requiring any additional active components, leading to high efficiency while maintaining the simplicity of conventional converters. Other main features of the proposed circuit are inherent shoot-through protection, reduced current stress of the semiconductors due to the coupled inductor, and low voltage stress across the low-side MOSFET. In addition, a pulse frequency modulation control scheme is used, which allows for an extended soft-switching range without imposing an excessive circulating current at light loads. The steady-state analysis and experimental results from a 120 W prototype are presented in this paper.