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UCC27201A: UCC27201

Fred Kleytman
Prodigy 60 points
Part Number: UCC27201A
Other Parts Discussed in Thread: UCC27201, , TINA-TI

There is an example of typical application and use of UCC27201 IC on the data sheet for the UCC27201 

I trying to understand the purpose of R13 and R14 as well as consideration for the resistance value (1K)  on this application.

  • 0
    TI__Genius 9301 points

    Hi,

    This seems to be a duplicate of the other post. I responded on the other thread. I'll go ahead and close this one.

    Regards,

    Leslie

  • 0 in reply to Leslie Marquez
    Prodigy 60 points

    Hi Leslie,

     

    Thank you for your comments.

    How critical UCC27201 part to the rise time and fall time?

  • 0 in reply to Fred Kleytman
    Prodigy 60 points

    Leslie, do you have spice symbol that I can use in LTSpice to simulate UCC27201 behavior in my application? 

  • 0 in reply to Fred Kleytman
    TI__Genius 9301 points

    Hi Fred, 

    In general, we recommend that the input stage of each driver must be driven by a signal with a short rise or fall time, and this condition is typically satisfied when the input signals are provided by a PWM controller or logic gates with fast transition times. With a slow changing input voltage, the output of driver may switch repeatedly at a high frequency. While the 100mV hysteresis offered by the device helps alleviate this concern care must be taken with these slow inputs to avoid this situation. If you need to limit the rise/fall times to reduce system noise, then you can add this RC filter and try to keep the RC constant close to 20 ns or less as show in the example. Even if you decide an RC filter is not needed, I would recommend to still have a placeholder for these in your board in case you end up needing it. 

    Regarding the model, we only have TINA-TI and PSPICE models. You can find these at ti.com under the UCC27201A product folder: https://www.ti.com/product/UCC27201A/

    You'll see the product name, some links to the datasheet, and below that you'll see some tabs. Click on "Design and development" and then click on "Design tools and simulations". This will display the list of the models available. 

    Best regards, 

    Leslie