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TPS22919: PSPICE question

Lucas Pucheta
Intellectual 300 points
Part Number: TPS22919

I do have a question on the TPS22919DCK.  I see there is a PSPICE model for this part, can PSPICE models be used with TI-TINA?

 

The application is using the part for a SW controlled CAN termination.  A snippet of the schematic is below.  The connection to pin 5 has been cut, so pin 5 is not connected.  Basically trying to use the part as an analog switch.  But it’s not working like I thought so I wanted to simulate it with TI-TINA.

 

Can PSICE models be used or modified to work with TI-TINA?

 

Thanks,

  • 0
    TI__Mastermind 32650 points

    Hi Lucas,

    Please follow this training video here: https://training.ti.com/importing-spice-models-tina-titm-simulator

    As far as Pin 5 is concerned on TPS22919, this pin is connected to the internal QOD. If you leave this pin floating or unconnected then the device will still work as normal but will not use QOD. 

    Thanks for using TI Power Switches in your designs.

  • 0 in reply to Shreyas Dmello
    Intellectual 300 points

    Thank you for this resource!

    I was able to import the model and get a simulation going.  I could not find a SPICE model for a CAN transceiver so I was not really able to see what was going on with the TPS22919 and the termination.

    Could you help me with a SPICE model for the CAN termination? Below is the snippet of my circuit.

  • 0 in reply to Lucas Pucheta
    TI__Mastermind 32650 points

    Hi Lucas,

    Unfortunately, I cannot provide a model for the CAN termination. CAN transceivers are not part of our Power Switch portfolio.

    My CAN understanding is basic. I know that you should be expecting a differential signal. Perhaps a workaround is to voltage probe your CAN lines and match the strings to what is expected? 

    Another thing I'd like to mention is that you should be accounting for the turn on delay, rise time, turn off delay and fall time for any switching application to make sure the square nature of the wave is maintained. I also see that you are using the internal QOD here.