PSPICE-FOR-TI: Convergence problem at longer simulation time

Tilden Chen

Expert 5906 points

Part Number: PSPICE-FOR-TI

Hello PSPICE Team,

I'm having issues simulating the attached project at longer simulation times (70 ms).

When I reduce the simulation time (70 ms to 8 ms), period of the voltage source (PW from 35m to 4m and PER from 70m to 8m), and secondary caps (C3 from 6.8u to 900n, C4 from 2.2u to 300n, C5 from 55n to 6.67n) by a few orders of magnitude, PSPICE seems to simulate.
I have autoconverge enabled and have tried adjusting some of the tolerance values, step size, etc suggested in other threads such as here and here but still run into the same error.

Output Window:

ERROR(ORPSIM-15138): Convergence problem in Transient Analysis at Time = 20.97E-06.
ERROR(ORPSIM-15660): These devices failed to converge
X_U1.G_U1_UPRIM_UMODE_G8
X_U1.M_U1_UPRIM_UMODE_VREF_SEL_MN4
INFO(ORPROBE-3185): Simulation paused

Convergence error (70 ms simluation time):