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PMP7991: Transformer choice 7508112328 does not match WEBENCH design based on same circuit characteristics.

Jean-Robert Desrosiers
Prodigy 20 points
Part Number: PMP7991

Hello, the reference design PMP7991 shows the development board using the 7508112328 transformer as part of fly-back conversion. However, your WEBENCH tool output circuit design based on same circuit characteristics do match transformer design inductance. I would like to know why the design tool does not match the development board transformer choice and if there is a way to get a WEBENCH design using the 7508112328 transformer. Thank you. WBDesign1.pdf 

  • 0
    TI__Mastermind 40530 points

    Hi Jean-Robert,

    Webench is a good tool to start your design and have a good idea of the some of the components needed. However, I highly recommend designing with what's in the reference design as these are designs that we've built up, tested, optimized on bench and have an associated test report to prove out the solution.