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A new SPICE subcircuit model of power p-i-n diode

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1 Author(s)
Strollo, A.G.M. ; Dipartimento di Ingegneria Elettronica, Naples Univ., Italy

A new modeling approach for the power p-i-n diode is proposed. The base region is represented with a two-port network, obtained by solving the ambipolar diffusion equation with the Laplace transform method, and by approximating the resulting transcendental functions in the s-domain with rational approximations. Two different networks have been obtained. The first one, based on Taylor-series approximation is shown to be a generalization of a two-port model already proposed in the literature for the nonquasi-static modeling of bipolar transistors. The second network representation is based on Pade' approximation and is shown to be more accurate than the Taylor-series approach, The obtained RLC networks are easily implemented in a PSPICE subcircuit which also takes into account the emitter recombination effects and the dynamic of the space-charge voltage build-up. Good agreement has been obtained by comparing the results of the proposed model with numerical device simulations

Published in:

Power Electronics, IEEE Transactions on  (Volume:9 ,  Issue: 6 )

Date of Publication:

Nov 1994

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