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TPS23755: start current of TPS23755

Betty Guo
Expert 7300 points
Part Number: TPS23755

Hi team,

we want to check how much the startup current?

I find that TPS23755 use advance startup, and integrate the current source.

  • 0
    TI__Mastermind 21320 points

    Hello Betty,

    The EVM has a startup waveform that shows the input current on page 6: 

    That will include the current used in advanced startup. 

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

     

    Regards, 

     

    Michael P.

    Applications Engineer

    Texas Instruments 

  • 0 in reply to Michael Pahl
    TI__Expert 7300 points

    hi Michael,

    I sitll not clear about the startup current. In the page 6, the Iin is the startup current,right?

    And, why it have a step and then spike? The startup current is less than 50mA?

  • 0 in reply to Betty Guo
    TI__Mastermind 21320 points

    Betty,

    The current shown in page 6 is the input current for the board. This will include the current in the startup circuit. Or, are you needing the specific current associated with the internal current source? If so, why is that number needed versus the overall input current required?

    The large current spike is inrush, which is limited by the IC. 

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

     

    Regards, 

     

    Michael P.

    Applications Engineer

    Texas Instruments 

  • 0 in reply to Michael Pahl
    TI__Mastermind 21320 points

    Hello,

    This thread has been inactive for many weeks now. I am going to close it, but feel free to reopen it or start a new thread. Thank you.

    Regards,

    Michael Pahl