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TPS23730EVM-093: Connecting 24V adapter

Israel Aminov
Prodigy 120 points
Part Number: TPS23730EVM-093

Please advice what changes need to be done in order to work with 24V adapter (Option 2, adapter and APD)

I changed R10 to 45K (according to SLVA306a doc)  , the board starts working with 24V, but the output voltage drops to 9V

  • 0
    TI__Mastermind 21320 points

    Hey Israel, 

    The TPS23730EVM-093 is not suitable for a 24V adapter. 

    First, the transformer must be able to accept 24V (plus variation so probably like 18V), up to 57V. Having a transformer like this requires a change in primary inductance and turns ratios. This thus requires a change in the sense resistor, and potentially some changes in the secondary gate drive circuits. 

    Additionally the UVLO threshold and APD thresholds will need to change. 

    We consider this to be a "wide-Vin" design, and although it could be based on TPS23730EVM-093, it would be considered an entirely new design. 

    If this post answers your question, please indicate so by marking this thread as resolved. Thank you.

     

    Regards, 

     

    Michael P.

    Applications Engineer

    Texas Instruments