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This is for Aime Dugras, who has uploaded two copies of SG3524.zip to the Temp folder, without explanation.

Aime, you forgot to include the model file "Sborka.lib"? Also, the 1N3890 model is missing.? The simulation "test1.asc" can not be run without them.? Remember, uploads should be complete, and include all required files and models that didn't come with LTspice.

I am puzzled why your TIP127.asy symbol requires Sborka.lib, yet there is a separate model file TIP127.lib, which is not used.? Maybe it was a mistake in your TIP127.asy symbol.

In your other schematic "test2.asc", there are three generic diodes "D".? That might work OK, but as a general rule, real diode models might simulate better than the generic default model "D".? The "D" diode model lacks some parameters (e.g., Rs>0, Cjo>0) that can make it less simulation-friendly than a real diode's model.

After you have uploaded a file, please announce it.? Send a new message, tell us what you uploaded a file, and what it is for.

Andy

Also FYI --

There are a couple of places in the group's Files with other SG3524 (or SG1524) models already:

Files > z_yahoo > Files sorted by message number > msg_45136
/g/LTspice/files/z_yahoo/Files%20sorted%20by%20message%20number/msg_45136/

Files > z_yahoo > Files sorted by message number > msg_77851
/g/LTspice/files/z_yahoo/Files%20sorted%20by%20message%20number/msg_77851/

Files > z_yahoo > Files sorted by message number > msg_59940
/g/LTspice/files/z_yahoo/Files%20sorted%20by%20message%20number/msg_59940
This one is puzzling, it MIGHT be an attempt to mimic the behavior of a SG3524, using other components.? I think the messages about that one are here, especially this reply and this reply.

Andy

Hi Andy
Thank you for your remarks. I forgot how i got the diode and the TIP 127.
I didn't be able to got switreg.lib to work. So i tried to make my model, which seems functionnal.
Uploaded it for who wants.

Didn't find 1N3890 in Sborka.lib, so i deleted test1.asc

You might have added the 1N3890 model to your "standard.dio" file that's in LTspiceXVII\lib\cmp.

That is often what gets LTspice users into "trouble", where they have a model and can't figure out where they got it, and they assume that everyone else must have that model too.

If you Generate the Expanded Netlist, you should be able to find every component model definition, without having to find where it was.? It would probably be located near the bottom of that listing.

Andy