john23 wrote, "How I got an error shown in the attached photo.What gone wrong when i tried to use the symbol created by eetech00 good model?"
It looks to me like you forgot to include the SPICE model in your simulation.
eetech00's test schematic, uploaded 27 April, had the line ".inc UCC5304.txt" to include the SPICE model.
Your schematic has nothing that I can see to include the SPICE model.? Therefore, the SPICE model (the subcircuit named "ucc5304") is missing from your simulation.? It can't find a subcircuit that is not there.
What is the symbol SQ3426EV.asy for?? I don't see it on your schematic.? Even if it were on the schematic, where is the model file needed for that device?? It's apparently in "C:\Users\yefimv\Documents\LTspice\sq3426\SQ3426EV_PS.LIB".
Why did you upload it twice?
Why did you create a symbol for what appears to be a FET?? LTspice already has FET symbols (NJF, PJF, NMOS, PMOS, NMOS4, PMOS4) which you should have used.? Having a FET symbol with the Gate on the upper right and Drain on the left is contrary to normal schematic standards.
Since SQ3426EV is an N-channel MOSFET, you should have used LTspice's "NMOS" symbol for that part.
You also wrote, "The LTspice files and models i made were uploaded into sim_mos_driver2 folder below."? Actually, you did not upload any models.? You uploaded only one schematic and two symbols, but no models.
Andy
