Integrated Common-Mode Filter for GaN Power Module With Improved High-Frequency EMI Performance

被引:20
作者
Jia, Niu [1 ]
Tian, Xingyue [1 ]
Xue, Lingxiao [2 ]
Bai, Hua [1 ]
Tolbert, Leon M. [1 ]
Cui, Han [1 ]
机构
[1] Univ Tennessee, Min H Kao Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA
[2] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA
关键词
Common mode (CM) noise; electromagnetic interference (EMI); GaN power module package; high frequency; integrated common-mode filter;
D O I
10.1109/TPEL.2023.3248092
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
While the employment of wide bandgap (WBG) devices in high-frequency and high-voltage applications brings benefits such as reduced system size and improved efficiency, it aggravates the electromagnetic interference (EMI) issue due to fast switching. High-frequency EMI noise suppression relies mainly on the filter design, where the filter's performance is strongly affected by parasitics. Through analyzing the common-mode (CM) equivalent circuit of a half-bridge power module, this letter identifies the key parasitics that dominate the performance of a common-mode filter (CMF) at high frequencies. To minimize the parasitics, the concept of integrating the CMF inside the WBG power module package is developed to improve the noise attenuation. A p-type CMF is integrated with a half-bridge GaN-based power module as a prototype to validate the concept. Experiments are conducted by measuring the CM noise spectrum received by the line impedance stabilization networks (LISNs) from the hard switching of the designed power module under 70 V and 80 kHz. Comparing the measured results of the integrated CMF to the externally added CMF, up to 50 dB mu V more attenuation is achieved by the integrated CMF in the frequency range of 10 to 100 MHz, verifying the theoretical analysis and the established CM equivalent circuit.
引用
收藏
页码:6897 / 6901
页数:5
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