Re: SD21x spice model?

Thanks Jim and Helmut,

I will try that. (Hope I can figure out how to make the necessary changes in OrCAD's model editor ...)

Klaus

Helmut Sennewald wrote:

"Klaus Bahner" <Klaus.Bahner@xxxxxxxx> schrieb im Newsbeitrag news:e83h4s$b7r$1@xxxxxxxxxxxxxxxxxxxx

Helmut Sennewald wrote:


Does anyone have spice models for the SD210/SD214 DMOS Fets?
I've found the models from Linear Systems, but they produce clearly wrong results at least when used in OrCAD PSPICE.



Hello Klaus,

Every Spice model is an approximation for typical parameters of a device.
What's not correctly simulated?

Well, it's not just an approximation thing. Even applying 20V as gate-source voltage, doesn't switch the Fet completely on. In this case the model just creates a drain current of about 600uA (@Vds ~13V) corresponding to an on resistance in the order of 20k, although it should be only 45 Ohms max.

Wouldn't call this just the usual difference between modelled and real circuit :-)


Cheers,
Klaus


Hello Klaus,

You have to specify the size W and L depending on what FET you want.
Then you will get for the SD210DE about Id=11.9mA @ Vgs=2.5V, Vds=5V.
The Rds_on is only 10 Ohm with Vgs=10V, but the model is
only specified for Vgs up to 2.5V.

Best regards,
Helmut



***** MODEL NAMES: *****
***** SD210DE: DMOS device model W=889um L=0.5um T=27C. *****
***** BIAS RANGE: VDSmax=20V VGSmax=2.5V VBSmax=-2V *****
***** *****
***** SD214DE: DMOS device model W=889um L=0.5um T=27C. *****
***** BIAS RANGE: VDSmax=12V VGSmax=2.5V VBSmax=-2V *****
***** *****
***** SD5400: DMOS device model W=889um L=0.5um T=27C. *****
***** BIAS RANGE: VDSmax=20V VGSmax=3.5V VBSmax=-2V *****
***** *****
***** SD5400CY: DMOS device model W=889um L=0.5um T=27C. *****
***** BIAS RANGE: VDSmax=12V VGSmax=3.5V VBSmax=-2V *****
***** *****
***** SST211: DMOS device model W=889um L=0.5um T=27C. *****
***** BIAS RANGE: VDSmax=30V VGSmax=2.5V VBSmax=-2V *****
***** *****
***** SST213: DMOS device model W=889um L=0.5um T=27C. *****
***** BIAS RANGE: VDSmax=10V VGSmax=3.5V VBSmax=-2V *****
***** *****
***** SST215: DMOS device model W=889um L=0.5um T=27C. *****
***** BIAS RANGE: VDSmax=20V VGSmax=3.5V VBSmax=-2V *****
***** *****




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