Single-stage isolated 48V-to-1.8V point-of-load converter utilizing an impedance control network and integrated magnetic structures
Single-stage isolated 48V-to-1.8V point-of-load converter utilizing an impedance control network and integrated magnetic structures
复制标题
采用阻抗控制网络和集成磁性结构的单级隔离式 48V 至 1.8V 负载点转换器
DOI：
10.1109/compel.2017.8013319
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
K. Afridi
中科院分区：
文献类型：
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作者：
Ashish Kumar;Saad Pervaiz;K. Afridi
本文介绍了一种基于阻抗控制网络 (ICN) 谐振转换器架构的单级隔离式 48V 至 1.8V 负载点转换器。该负载点 ICN 转换器可实现大幅降压，同时在较宽的输入电压和输出功率范围内保持高效率。使用新型导抗网络变压器和谐振倍流整流器实现大降压。利用 ICN 架构实现了高效率，该架构可在宽工作范围内实现零电压和接近零电流的开关。通过将其磁性组件组合成两个集成磁性结构，转换器的功率密度得以增强：一个使用两个耦合绕组实现 ICN 的三个电感器，另一个在公共磁芯上实现导抗网络变压器和电流倍增器磁性元件。引入了一种系统方法来设计和优化所提出的 ICN 转换器。原型 90W ICN 转换器采用 PCB 集成磁性元件，设计用于在 36V 至 60V 的输入电压范围和 1.8V 的输出电压范围内运行，并进行了测试。原型 ICN 转换器实现了近 90% 的峰值效率，并在近 2:1 的输入电压范围内保持高于 87.9% 的效率。
This paper introduces a single-stage isolated 48V-to-1.8V point-of-load converter based on the impedance control network (ICN) resonant converter architecture. This point-of-load ICN converter achieves large step-down while maintaining high efficiency across a wide range of input voltage and output power. Large step-down is achieved using a novel immittance network transformer and a resonant current-doubler rectifier. High efficiency is achieved by utilizing the ICN architecture, which enables zero-voltage and near-zero-current switching across wide operating ranges. The power density of the converter is enhanced by combining its magnetic components into two integrated magnetic structures: one implementing the three inductors of the ICN using two coupled windings, and the other implementing the immittance network transformer and current-doubler magnetics on a common core. A systematic methodology is introduced to design and optimize the proposed ICN converter. A prototype 90-W ICN converter utilizing PCB-integrated magnetics, designed to operate over an input voltage range of 36 V to 60 V and an output voltage of 1.8 V is built and tested. The prototype ICN converter achieves a peak efficiency of nearly 90%, and maintains greater than 87.9% efficiency across its nearly 2:1 input voltage range.