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TPS23523: Whether TPS23523 can complete a whole hot plug cycle under 50uS

Eric Lai
Expert 4940 points
Part Number: TPS23523

Hi Expert,

The engineer is asking whether TPS23523 can complete a whole hot plug cycle under 50uS.

The purpose is to get the max Id capability from the SOA scheme.

Of course, this applicant can accept a fast output voltage rising.

Pls advice.

Thanks

 

Best regards,

Eric Lai

 

Field Application Engineer

Texas Instruments Taiwan Limited

O: +886-2-2175-2582

M: +886-909-262-582

E-Mail:Eric.Lai @ti.com 

  

  • +1
    TI__Guru** 105561 points

    Hi Eric,

    No, the controller has limited gate drive strength so the startup process will last couple of ms. We can further slow down the startup process to reduce the inrush current and hence reduce stress on the MOSFET 

    Can you share the system specs and use case details.

    Best Regards, Rakesh

  • 0 in reply to Rakesh
    TI__Expert 4940 points

    Hi Rakesh,

    Thanks for your support.

    The system conditions is 54Vo,62A typ with 330uF (Cout)

    Follow the TPS23523X excel tool (Set 70A on Row 21 and 0.36mOhm on row23) 

    We are confusing of the 8.33A capability for high Vds now.

    If the load current is applied during start up.Whether the TPS23523X current limit is trigger during the start up.

    And the output will see the hot plug Mos is turn on then turn off cycling.

    Pls advice how to cover this if the load current is exist during start up.

    Thanks

    Best regards,

    Eric Lai

     

    Field Application Engineer

    Texas Instruments Taiwan Limited

    O: +886-2-2175-2582

    M: +886-909-262-582

    E-Mail:Eric.Lai @ti.com 

  • 0 in reply to Eric Lai
    TI__Guru** 105561 points

    Hi Eric,

    Please share the filled up design calculator with your system inputs.

    The max load we can support during startup is ICL2 as per eqn (4) in the datasheet

    What do you mean by "And the output will see the hot plug Mos is turn on then turn off cycling."

    Best Regards, Rakesh

  • 0 in reply to Rakesh
    TI__Guru** 105561 points

    Hi Eric,

    I am closing the thread here as we are discussing on the design over email

    Best Regards, Rakesh