20MHz, Two Phase Negative Coupled Inductor Design for Integrated Voltage Regulator in Smartphone Applications
20MHz, Two Phase Negative Coupled Inductor Design for Integrated Voltage Regulator in Smartphone Applications
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DOI：
10.1109/apec39645.2020.9124371
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发表时间：
2020-03
期刊：
影响因子：
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通讯作者：
Feiyang Zhu;Qiang Li;F. Lee
中科院分区：
文献类型：
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作者：
Feiyang Zhu;Qiang Li;F. Lee
为了在智能手机应用中为高性能处理器提供紧凑高效的电源解决方案，工作在超高频(10 MHz以上)的三维集成稳压电源成为一种很有前途的解决方案。最具挑战性的部件之一是具有小占地面积、小损耗和大电流处理能力的超低轮廓磁性设计。提出了一种新型的TKOIN金属-片状复合磁性材料两相负耦合电感结构。在有限元工具的帮助下，对结构的探索和设计过程进行了说明。新的电感结构具有非常小的电感损耗(每相0.15W)和占地面积(每相<；4mm2)、大的电感密度和电流处理能力(每相3A直流电流)，工作在20 MHz的开关频率。为了验证电感的设计和评估电感的热性能，制作了三种不同的电感样品并进行了实验测试。
In order to provide a compact and efficient power solution for high-performance processors in smartphone application, three-dimensional integrated voltage regulator operating at ultra-high frequency(beyond 10MHz) becomes a promising solution. One of the most challenging parts is ultra-low profile magnetic design with small footprint, loss and large current handling capability. In this paper, a novel, two phase negative coupled inductor structure with TKOIN metal- flake composite magnetic material is proposed. The structure exploration and design process are illustrated with the help of finite element tool. The new inductor structure features very small inductor loss(<0.15W per phase) and footprint(<4mm2 per phase), large inductance density and current handling ability(3A dc current per phase) operating at 20MHz switching frequency. Three different inductor samples are fabricated and experimentally tested to verify the design and evaluate thermal performance of inductors.