The Diode 2 component extends the basic Diode as follows:
•
|
It models reverse breakdown.
|
•
|
The parameters are those typically published for real-world diodes.
|
•
|
A series resistance has been added.
|
•
|
The parallel resistance has been replaced by a conductance, which can be set to zero.
|
The model consists of a pure diode section, a resistance, , in series with the pure diode, and a conductance, , in parallel with the pure diode. The current, , through the pure diode is given in the following table.
Region
|
Condition
|
Current
|
Lower half of reverse biased region.
|
|
|
Upper half of reversed biased region, and forward biased region before conduction.
|
|
|
Forward biased region after conduction.
|
|
|
|
|
where
•
|
is the voltage across the pure diode,
|
•
|
is the thermal voltage (k is the Boltzmann constant, q is the elementary charge),
|
•
|
is the linear continuation threshold,
|
•
|
is the current at that threshold, and
|
•
|
is the conductance at the threshold.
|