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TPS2373-4EVM-758: Design question for TPS2373-4 EVM

Ray Chang
Intellectual 1345 points
Part Number: TPS2373-4EVM-758


Hi, Team

My customer is evaluating TPS2373-4 for 802.3bt

Currently, there is a development project which is 12v/70W output. 
We have some questions about EVM for 802.3bt design. 

1.Could you let us know how many H for transformer? Our transformer was 153uH on demo-board.

2.Should we need 100uF at C28 on reference design? The capacitance was large for my customer application.

3.For the Q12, Q17 on EVM, could we use mmbt3906/4 to replace it?

4.What is the Q13 and Q15 VDS maximum rating need?

Do you have the calculation tool for TPS2373-4?

  • 0
    TI__Mastermind 41800 points

    Hi Ray,

    1. 153uH is still okay for 12V

    2. Since it's the same power level, yes, C28 should be same as EVM.

    3. It is not recommended to use SOT23 because of poor thermal performance. Note also for 12V Q15 needs a different gate drive.

    4. Q13 and Q15 should be 60V FETs.

    Let's discuss this more offline.

    Thanks!