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LTspice Triac .model doesnt work

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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 ...

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