LLC resonant converter for 48 V to 0.9 V VRM
LLC resonant converter for 48 V to 0.9 V VRM
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DOI：
10.1109/pesc.2004.1355397
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发表时间：
2004-06
期刊：
影响因子：
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通讯作者：
Yanjun Zhang;Dehong Xu;Min Chen;Yuanzheng Han;Zhoong Du
中科院分区：
文献类型：
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作者：
Yanjun Zhang;Dehong Xu;Min Chen;Yuanzheng Han;Zhoong Du
介绍了使用 LLC 谐振转换器的 48 V 至 0.9 V VRM。开关实现了ZVS，转换器可以工作在更高的频率。探讨了如何通过减小功率因数角来减小一次电流幅值。研究了次级漏感的影响，并使用有限元分析方法找到最佳的变压器绕组配置。谐振电感器可以与变压器初级漏感集成，从而减少总磁性元件数量。构建了 48 V 至 0.9 V/50 A VRM 原型来验证结果。
48 V to 0.9 V VRM using LLC resonant converter is presented. ZVS is realized for switches and the converter can operate at higher frequency. How to reduce primary current amplitude by reducing power factor angle is explored. The effect of secondary leakage inductance is studied and FEA method is used to find the optimal transformer winding con figuration. The resonant inductor can be integrated with transformer primary leakage inductance, which reduces the total magnetic component counts. A prototype of 48 V to 0.9 V/50 A VRM is built to verify the result.