Computer-aided simulation, especially using the SPICE2 package, has been recently introduced in the analysis and the design of power electronic circuits. However the modelling of power semiconductor devices with the inherent models in the SPICE2 program is inaccurate.
In this paper, a power diode model, compatible with the SPICE2 simulator, is investigated and an improved method to determine the related static and dynamic parameters is described. These parameters are extracted using only data sheet information.
The analysis is based upon the physical structure of a PIN diode. This paper shows how the voltage drop across the middle region, the high order effects which are arised at high current densities and the reverse recovery behaviour are taken into account in the proposed power diode model.
Simulation results are compared with measured points obtained from data sheets. The model is also tested by simulating the switching behaviour of a buck DC-to-DC converter and an excellent correlation is found between simulated and experimental wave-forms.
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