I have been trying to understand your models of PWM controllers. It never makes sense to add them for any simulation that takes under a minute or two. If these changes don't significantly improve the speed of the simulation, remove them. To me, it means something in the circuit is poorly behaved in other words, there is something in a model that is not realistic.Īll of these settings changes trade off accuracy for speed. See Understanding the Control Options for a more detailed look.īe suspicious of circuits that need something like the alternate solver or cshunt. Adding a small CSHUNT to each node can solve some "internal timestep too small" problems caused by high-frequency oscillations or numerical noise. options cshunt=1e-15 => Capacitance added from each node to ground.
options reltol=0.003 => Increase the allowed tolerance from 0.0001 to 0.003 for theĬonvergence criteria. options abstol=1e-10 => Increase the allowed tolerance from 1e-12 to 1e-10 for the
options gmin=1e-10 => Add a small conductance of 1e10(=10GOhm) parallel to every diode SPICE settings that generally work with Transient Analysis
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