MODEL


Ideal Semiconductor Parameters.
Function Specify piece-wise linear model parameters for a diode, IGBT, Mosfet, Zener, Schottky, thyristor, DIAC, TRIAC or a GTO.
Model parameters are defined in a .MODEL command line. See the menu items Insert/Edit Commands, Insert/Include Files
Format .Model Modelname Type <Ron=r><Roff=r> <VthOn=r><VthOff=r> <VthGate=r>
ModelnameName which is used for identifying the model.
TypeType of the model, choose between:
Dswitch, SCR, DIAC, TRIAC, GTO
<Ron>On resistance of the device. Default value = 1e-3 ohm
<Roff>Off resistance of the device. Default value = 1e+6 ohm
<VthOn>Threshold voltage Vak of the diode. If Vak > VthOn the diode turns on. Default value=0.6.
<VthOff>Threshold voltage Vak of the diode. If Vak < VthOff the diode turns off. Default value=0.
<VBR> 
<VthGate>Threshold voltage of the gate ( only for thyristors and GTOs). If (Ngate or Sgate) > VthGate, the thyristor or the GTO is turned on. If (Ngate or Sgate) < -VthGate, the GTO is turned off. Default value=0.6.
Special
DswitchDiode
SCRThyristor (Silicon Controlled Rectifier)
GTOGate Turn-Off Thyristor
DIACThe threshold voltage of the DIAC in the on state is defined by VthOff
TRIACThe TRIAC is turned on if the value of Sgate is bigger than zero. The gate of the TRIAC has only a logic function.
Initial condition: (Specified at the component)
IC=OnP
Conduction from node1 to node2
IC=OnN
Conduction from node2 to node1
ZENERSame functionality as the Diode
SCHOTTKYSame functionality as the Diode
MOSFET 
IGBT 
Forward voltage of the Diode, SCR, GTO, DIAC and TRIAC.
The forward voltage of a Diode, SCR, GTO, DIAC or TRIAC is defined by VthOff.
The Diode, SCR, GTO, DIAC or TRIAC turns on if Vak>VthOn, having a forward voltage of VthOff. As soon as the voltage across the diode, SCR, GTO, DIAC or TRIAC drops below VthOff, causing a negative current, the device turns off. Default the forward voltage is set to 0 volt.
Example
.Model Dfree
.Model matrix
.Model GTOmodel
.Model Ddiac
Dswitch
SCR
GTO
DIAC
ron=1
Vthgate=0
Vthgate=1
VthOn=0.8
roff=10000
Vthon=0.01

VthOff=0.6
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