一种具有高降压增益的新型非隔离gan基DC-DC变换器

2020 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia) Pub Date : 2020-09-23 DOI:10.1109/WiPDAAsia49671.2020.9360280

Longyang Yu, Chengzi Yang, Shuting Feng, Feifei Yan, Xiang Zhou, Laili Wang

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引用次数: 0

摘要

随着宽带隙功率半导体技术和现代铁氧体材料的兴起，氮化镓(GaN)器件的dc-dc变换器的开关频率可以进一步推进到兆赫范围，实现更高的功率密度。针对数据中心的前端dc-dc变换器，提出了一种高降压增益、高效率的非隔离dc-dc变换器。该变换器由三个有源开关、两个同步整流器、两个箝位电容器和两个电感组成。与传统降压变换器相比，该变换器具有更高的电压增益和更低的主动开关电压应力。建立了基于300W/1 MHz氮化镓的实验样机并进行了测试，验证了其正确性和有效性，峰值效率为93.3%，满负荷效率为90.7%。

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A Novel Non-isolated GaN-based DC-DC Converter with High Step-Down Gain

With the emerging technology of wide-band-gap power semiconductors and modern ferrite materials, the switching frequency of dc-dc converters based on gallium nitride (GaN) devices can be further pushed to megahertz range and achieve higher power density. A high step-down gain, high efficiency non-isolated dc-dc converter is proposed for front-end dc-dc converters used in data centers. The proposed converter is composed of three active switches, two synchronous rectifiers, two clamping capacitors and two inductors. Compared with the conventional buck converters, the proposed converter has higher voltage gain and lower voltage stresses across the active switches. A 300W/1 MHz GaN-based experimental prototype is built and tested to verify the correctness and validity, demonstrating a peak efficiency of 93.3% and full-load efficiency of 90.7%.

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来源期刊

2020 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia)

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