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WEBENCH® Tools/TPS560430: Design cannot be created warning in Webench

Stephen Felkel
Prodigy 40 points
Part Number: TPS560430

Tool/software: WEBENCH® Design Tools

Hey all,

I have a customer that is looking for a low cost buck converter that can take a 23 V input and output 1.2 V @ 200 mA. I'm recommending the the TPS560430 for his applications but I tried simulating on Webench using the following specs; Vin: 8-36V, Vout:1.2V, Iout:0.2mA and ambient temp:30C and the design pops up that it cannot be created. All of these are within the operating specs of the device so is there an issue with Webench? Thanks for the help

-Stephen

  • 0
    Genius 4910 points

    Hi Stephen,

    Please note that as per the design error, the device is violating minimum ton condition.

    The min-ton for the device is 60n as per the datasheet. For the above condition, the min-ton is 

    min-ton = Dmin / fsw

        = 0.036/1.1E6

        =32.7n

    Let me know if this resolves your query.

    Thanks and Regards,

    Atul

  • 0 in reply to Atul_Kulkarni
    TI__Prodigy 40 points

    Thanks for the help Atul. I was pulling it up from the product page so all I got was a blank screen that the design didn't work but that makes complete sense.

  • 0 in reply to Stephen Felkel
    Genius 4910 points

    Got it, Stephen. Going forward you can also check for a list of devices by entering the condition in "New design" tab and find the list of devices.

    Also, you can check the reason for failure for a particular device if there is any.