An inductor-less hybrid step-down DC-DC converter architecture for future smart power cable
An inductor-less hybrid step-down DC-DC converter architecture for future smart power cable
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适用于未来智能电力电缆的无电感器混合降压 DC-DC 转换器架构
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Hanh
中科院分区：
文献类型：
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作者：
Gab;Hanh
本文提出了一种DC-DC降压电源转换架构，允许电源线，如USB电缆，提供电力传输和电力转换功能。在这种架构中，提出了一种S-混合转换器拓扑结构，利用寄生电感容易在电缆中的功率转换级。因此，可以消除降压转换器对应物中经常需要的显式电感器及其相关损耗，从而有望实现更好的完全集成和提高的效率，特别是在中到重负载条件下。此外，这种S-Hybrid转换器架构需要更少的电感，并实现更小的电感电流涟漪，从而有助于实现更好的性能。该架构进行了实验验证的概念验证15 W电感器的锂离子电池充电器原型，使用1米的USB 3.0电缆。该转换器在5 V输入下以2 MHz的频率进行开关，实验结果表明，最大效率为89.7%，满载时效率比降压转换器高6.0%。此外，满载时相对45.7%的板上损耗降低高度保证了其出色的集成可行性。
This paper presents a DC-DC step-down power conversion architecture that allows a power cable, such as USB cable, to deliver both power transmission and power conversion functions. In this architecture, an S-Hybrid converter topology is proposed to utilize parasitic inductance readily available in the cable for power conversion stage. As a result, the explicit inductor often required in a buck converter counterpart and its associated loss can be eliminated, promising better full integration and improved efficiency especially in mid to heavy load conditions. In addition, this S-Hybrid converter architecture requires less inductance and achieves smaller inductor current ripple that in turn contributes to better performance. The architecture is experimentally verified with a proof-of-concept 15 W inductor-less Li-ion battery charger prototype using 1 m USB 3.0 cable. The converter, switched at 2 MHz from a 5 V input, experimentally achieves 89.7% maximum efficiency and 6.0% higher efficiency at full load than a buck converter counterpart. In addition, a relative 45.7% on-board loss reduction at full load highly promises its excellent integration feasibility.