I am trying to simulate SNVA829 (constant current constant voltage) schematic given in the application report from TI. I downloaded the spice model from TI site and imported it to microcap. When I tried to run the transient analysis I get the following error (seems it's a warning but it doesn't start or complete the simulation due to the warning); Warning: Extra Text 'TC=0,0' found. Part: X4.C_C1 File: enter image description here enter image description here enter image description here

Any idea on how to fix it? Is the model not correct?

  • \$\begingroup\$ please do not post pictures of text ... post the text instead \$\endgroup\$
    – jsotola
    Commented Dec 5, 2023 at 22:08
  • \$\begingroup\$ I don't think microcap likes TC in capacitor definitions. Have you tried just removing the 'TC=0,0'? \$\endgroup\$ Commented Dec 5, 2023 at 22:13
  • \$\begingroup\$ I haven't tried to removing TC. Do I need to remove just "TC=0,0" or the whole line. I am not familiar with spice modeling, so didn't want to mess up the model \$\endgroup\$
    – nmr
    Commented Dec 5, 2023 at 22:16
  • \$\begingroup\$ just the "TC=0,0" leave the rest \$\endgroup\$ Commented Dec 5, 2023 at 22:18
  • 1
    \$\begingroup\$ Thanks; removing "TC=0,0" did work. Is TC the same as TC1,TC2? Just weird it works for resistors but not for capacitors. So, Microcap ignores capacitor changes due to temperature? \$\endgroup\$
    – nmr
    Commented Dec 5, 2023 at 22:41

1 Answer 1


According to the manual page 556, Microcap does not use temperature coefficients for capacitors like it does for resistors.

Removing "TC=0,0" will fix the problem


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