Model description and parameter extraction

AN2657

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Model description and parameter extraction

The model introduced in this application note is a behavioral model with the equations

written in verilog language [1] [2].

Figure 1.

Model schematic

By observing the equivalent model schematic of Figure 1, the following elements can be

noted:

●

Parasitic elements associated with the device

●

Nonlinear current generator

●

JFET resistance

●

Substrate-body diode

Parasitic elements

To model the parasitic elements of the device, a resistor and an inductor are placed in series

at each terminal. The model can change the resistance and inductance values according to

the simulation temperature.

coefficient, T is the temperature used in the simulation and Tnom is the temperature used to

measure the parameter value.

Equation 1

PT

()

PT

NOM

()

1T

C

TT

NOM

–

()

⋅

+

()

⋅

=