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About TPS2592AA peak current protection

Nat Wong
Genius 3070 points
Other Parts Discussed in Thread: TPS2592AA

Dear Sirs

My customer use TPS2592AA for their +12V protection.

When power up, the load will over 3.7A in 200ms. (peak current over 3.7A)

And TPS2592AA will work to protect the output circuit.

If they do not want TPS2592AA work when power up,

How could them do?

Thanks 

  • 0
    TI__Intellectual 2980 points
    Hello Wong,
    yes , if the current goes more than 3.7A for 200ms , the device enter the auto retry mode and if the the current get lower than 3.7A after 200ms, the IC will function as normal.
    I probably do not understand your question, "If they do not want TPS2592AA work when power up," in that case how will you feed the power to the load.

    Well you can disable the TPS2592AA by pulling down the EN pin for the duration you want.
    Please let me know for further question.

    Best Regards
    Dinesh
  • 0 in reply to Dinesh Kumar6
    Genius 3070 points
    Hi Dinesh

    Thank you~
    If I disable the TPS2592AA by pulling down the EN pin,
    there is no output (12V) for TPS2592AA.

    When power up, the load will over 3.7A in 200ms. (peak current over 3.7A)
    They do not want TPS2592AA limit the 12V output when power on.

    How could them do to allow +12V pass when power on?

    BRS
    Nat
  • 0 in reply to Nat Wong
    TI__Intellectual 2980 points

    Hello Nat,

     Yes, When you pull down the EN , Vout will be disable.

    Any current higher than 3.7A , will put the device onto auto-retry.

    since your continuous of current is lower ( 1.6A).  may be you want to try  larger output capacitor to meet the 200ms demand. 

    In that case you should enabling the load once your output caps are changed.

    Regards

    Dinesh