Power MOSFET simulation-a model to predict the behavior of a single cell as well as a hybrid power module

The switching performance of power MOSFETs as a function of the input characteristics is described. The use of highly doped silicon gate material together with a voltage-dependent shunt input capacitance results in a single cell resembling a transmission line element. Thus the MOSFET chip can be described as a two-dimensional line. Since the switching performance is a function of the input voltage, the form of the transmitted gate-trigger pulse mirrors the switching performance of the structure. The model introduced describes the effects of the propagation delay of the gate signal. It can be used to show the effects of the on-chip delay of the applied gate voltage on the surface of a single MOSFET as well as on discrete paralleled cells comprising the vertical power MOSFET. >