Re: Need Help, LTspice SCR model

"amdx" <amdx@xxxxxxxxxxx> schrieb im Newsbeitrag
news:75728$45df8d86$45011502$21227@xxxxxxxxxxxxxx
Hi all, I found the following model of an SCR on the web. I have tried to
use it in a simple circuit and I can't seem to get it to work. It barely
turns on.
I would like a model for a 2N5060, I don't find one.
Is there something obviously wrong with this model?
Or, can someone give me a model of a small signal SCR?
Thanks, Mike
*SCR
*Extracted from PONT_DIPH.CIR file from EDN website.
*I renamed that file as SCR_CKT.CIR
* Anode
* | Cathode
* | | Trigger
* | | |
.subckt SCR 1 2 3

Hello Mike,

The SCR symbol in LTspice has the pin order Anode, Trigger, Cathode.
You could either make a new symbol SCR1 with the netlist order
Anode, Cathode, Trigger or you simply change the pin order in the
subcircuit.

Solution 1: Change the subcircuit line

* Anode
* | Trigger * | | Cathode
* | | |
.subckt SCR 1 3 2


Solution 2:

Make a copy SCR1.asy from the synbol SCR.asy.
Open the new symbol SCR1.asy and change the netlist order
of the gate/trigger pin to 3 and the the cathode pin to 2 as
required by the original subcircuit.


Both methods are ok. Take your choice.

Best regards,
Helmut


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