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TPS54218: Warning about voltage pin which does not exist in schematic.

Bob Zwicker
Prodigy 210 points
Part Number: TPS54218
Other Parts Discussed in Thread: TINA-TI

I am using TI-Tina to simulate a power converter with TPS54218.  I think the simulation runs OK.  But I get a warning that Pin 1 of Voltage Pin VF2 is floating.  My schematic has no voltage pins.  I do have a voltage meter VM1 between output and ground.

I tried to submit this to the simulation tools forum but the part number forces me into power management forum.TPS54218 buck July 25 2020a.TSC

  • 0
    TI__Expert 3611 points

    Hi Bob,

    I will check with our SPICE team and I will get back to you asap.

    But you are able to finish the simulation and obtain the results correct?

    Regards,

    Davor

  • 0 in reply to Davor Pavlovski
    Prodigy 210 points

    Thank you, Davor.

    Yes that is correct.  This is not urgent but the warnings do reduce my confidence in the results.  It would be helpful if TINA-TI offered a means of locating what might be an invisible "voltage pin".  If I try adding voltage pins, I get VF1 and then VF3.  So VF2 might exist somewhere.........

  • 0 in reply to Bob Zwicker
    Prodigy 210 points

    I now have (by accident) found VF2.  I wish that there was a way to search for the location of components in the schematic.  Looking at it now, VF2 looks reasonably obvious.  I do miss things sometimes, but I really spent effort looking for VF2 yesterday and could not find it.  This does not make sense.  I wonder whether there is something about TINA-TI which may have hidden VF2 pending closing and re-opening TINA-TI?