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TPS23754: SCH check

Fandy
Expert 2285 points
Part Number: TPS23754

Hello,

Please help to review the SCH of TPS23754, output is 5V/4A, SCH is refer to TPS23754evm-420, just a little change, don't need adaptor input.

  • 0
    TI__Mastermind 21320 points

    Hello Fandy,

    Thank you for your question and for providing your schematic. I reviewed it, and I have some feedback. 

    I notice you connect RTN and VSS together, and use VSS as your ground reference for the board. This is not the proper use of VSS, and must be changed. VSS and RTN need to be separated, and RTN should be the ground reference for the primary side. Please refer to the EVM for an example. 

    I also notice the input capacitors C95 and C14 are 100x what the EVM has, and I wanted to ask the reasoning why this is increased? 

    Lastly, the output capacitance appears to be much smaller, so the output ripple will be larger but the transient response should be faster. This value could be changed if the output ripple is too high. 

    Regards,

    Michael Pahl