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TPS2660: behavior of the FLT pin

Hayashi
Expert 1840 points
Part Number: TPS2660


My customer wants to know about the behavior of FLT.

The attachment is the graph of Vin, Vout, FLT, Iout when it was turned on.

Please let me know why the FLT turned low.

Best Regards,

HayashiTPS26600 FLT .pdf

  • 0
    TI__Genius 16305 points

    Hi Hayashi,

    I have looked at the graph of the FLT behaviour and it is not expected to go low after powering up.

    Can you please tell what is the pull up resistor from FLTb to 5V ?

    Does the customer see this problem everytime he powers the system?

    Does this happen in a special case? Please help to explain the scenario when the customer sees this FLTb behaviour.

    Regards,
    Kari.

  • 0 in reply to Karikalan Selvaraj
    Expert 1840 points
    Kari san

    Thank you for your advice.
    I answer your question.

    Can you please tell what is the pull up resistor from FLTb to 5V ?
    >They pull up resistor at 10 ohm from FLTb to 5V.

    Does the customer see this problem everytime he powers the system?
    Does this happen in a special case?
    >When it is no load, every time happen.

    If you want to check the circuit, would you mind to send me email?
    I will send you it

    My address : ta-hayashi@fujiele.co.jp

    Best regards.
    Hayashi
  • 0 in reply to Hayashi
    TI__Genius 16305 points

    Hi Hayashi,

    Thank you.

    I have sent an email in this regard.

    Regards,

    Kari.