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Modeling buffer layer IGBTs for circuit simulation

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1 Author(s)
Hefner, Allen R. ; Semiconductor Electron. Div., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA

The dynamic behavior of commercially available buffer layer IGBTs is described. It is shown that buffer layer IGBTs become much faster at high voltages than nonbuffer layer IGBTs with similar low voltage characteristics. Because the fall times specified in manufacturers' data sheets do not reflect the voltage dependence of switching speed, a new method of selecting devices for different circuit applications is suggested. A buffer layer IGBT model is developed and implemented into the Saber circuit simulator, and a procedure is developed to extract the model parameters for buffer layer IGBTs. It is shown that the new buffer layer IGBT model can be used to describe the dynamic behavior and power dissipation of buffer layer IGBTs in user-defined application circuits. The results of the buffer layer IGBT model are verified using commercially available IGBTs

Published in:

Power Electronics, IEEE Transactions on  (Volume:10 ,  Issue: 2 )