Analysis and Modeling of Cross-Coupling and Substrate Capacitances in GaN HEMTs for Power-Electronic Applications

被引:35
作者
Ahsan, Sheikh Aamir [1 ]
Ghosh, Sudip [1 ]
Khandelwal, Sourabh [2 ]
Chauhan, Yogesh Singh [1 ]
机构
[1] IIT Kanpur, Dept Elect Engn, Nanolab, Kanpur 208016, Uttar Pradesh, India
[2] Macquarie Univ, Dept Sci & Engn, Sydney, NSW 2109, Australia
关键词
Capacitance; cross-coupling; GaN HEMTs; mixed-mode; substrate; switching; ALGAN/GAN HEMTS; CIRCUIT;
D O I
10.1109/TED.2017.2654264
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
In this paper, we present a capacitance model for field-plate AlGaN/GaN High Electron Mobility Transistor (HEMTs) accounting for the contribution of substrate capacitances and cross-coupling between field plates. TCAD simulations are performed to analyze both these contributions and analytical expressions for charges corresponding to the cross-coupling and substrate capacitances are presented in terms of our existing surface-potential-based model. The modeled results are validated by comparing the time domain waveforms of a test circuit using a mixed-mode simulation setup in which the impact of cross-coupling and substrate capacitances on accuracy of switching transients predicted by the model is discussed.
引用
收藏
页码:816 / 823
页数:8
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