Gute Nachrichten, Detlef !!
Ich habe einen Experten konsultiert. Dieser hat das UCC21520 model angepasst, sodass es jetzt auch mit LTspice 24.1.9 funktioniert.
Hier zur Info was geändert wurde: Änderungen im Modell UCC21520-Trans.lib
It turns out that 24.1.9 does not appear to convert the diode model parameter N=0.001 to 0.1, as previous versions did. It was one these instances that prevented convergence in 24.1.9,
which caused the simulation to bomb out.I fixed it by changing the diode model to an "ideal" diode using LTspice's
simplified behavioural diode model, e.g.: .model myD D(Ron=50m Vfwd=10m epsilon=5m)
As previously mentioned, the 100V switched side is floating (hence the warning), although LTspice seemingly decided that V(com) ~ -5V.
I added a parallel resistance (1MΩ) to the bridging capacitor, C3.
Anbei die geänderten files als Anhang.
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Gruß Udo
