PSPICE-FOR-TI: How to do WCCA simulation?

Hi Lijia,

Thanks for reaching out!

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Regarding a WCCA simulation; you will likely want to include parasitic inductances on the IN, OUT, GND, and VDD pins.  A few nano Henry's will likely be good for the inductance values.  You can also estimate inductance values based on your expected PCB layout. 

Make sure to put parasitic inductances on both sides of passive components to GND too to make this the absolute worst case.

In summary, you will want to put parasitic inductances, capacitances, and resistances where you could expect them with the appropriate small values.

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When moving forward to the design/layout stage of the project, be sure to create a layout with short and wide traces, especially on the output traces, and to put the bypassing capacitors as close as possible to the driver too.

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I hope this helps and answers your question.  If so, please press the green button; otherwise feel free to follow up with additional questions.

Thanks,

Aaron Grgurich