LTspice Triac .model doesnt work

[Faringdon]

Hi,
Do you know why this triac model doesnt work in LTspice.
I got it here.
https://www.powerelectronicsnews.com/power-supply-design-note-simulating-a-triac/

[Weston]

Sometimes models you find online do not match the expected pin ordering on the symbol in LTSpice. I checked out of curiosity and the pin order for the netlist seems to match.


What errors / issues are you having? Are you getting an error when you run the simulation? Or just not the expected behavior?

Your triggering circuit looks at least a bit unconventional. Have you tried a simpler circuit?

[Andy Watson]

Looks like you are trying to trigger the triac with a negative going pulse - which will be clamped by D1.

[Faringdon]

Hi,
Sorry my bad....i hadnt sized the RC trigger cct correctly ...