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TPS551892-Q1: Maximum output current

Saira Shaikh
Prodigy 170 points
Part Number: TPS551892-Q1


Tool/software:


Greetings of the day!

What is the maximum output current of this Buck-boost regulator? In the Datasheet it says 8A inductor current limit.
However, we just wanted to confirm it once.

May I know what must be the exact value to consider?
Thanks in advance.

  • 0
    TI__Mastermind 18090 points

    Hi Saira,

    Thank you for reaching out. May I know what application is used for?

    In buck mode(Vin>Vout), maximum output current equals average inductor current, which is 8A typical, 7A minimum.

    In boost mode(Vin<Vout), maximum output current depends on minimum input voltage, maximum input current(equals average inductor current, which is 8A typical, 7A minimum), efficiency, maximum output voltage. Ioutmax = Vinmin*7A*EFF/Voutmax.

    You can provide your input/output spec and I will calculate a reference value for you.

    Regards

    Mulin

  • 0 in reply to Mulin Yuan
    Prodigy 170 points

    Thank you for the reply

    This is IC needs to generate 12V from a battery input of 11.1V to 12.6V.
    The system load requirement is 3A. Efficiency according to the datasheet is near around 98%. with calculations, the output current comes close to 6.04A.
    Seems to be good enough for our application.

    Thank you so much for the help. Appreciate it!

  • 0 in reply to Saira Shaikh
    TI__Mastermind 18090 points

    Hi Saira,

    Glad to hear. May I know what kind of battery it is and what is the 12V supplied for? I rarely hear of such voltage rail.

    Regards,

    Mulin

  • 0 in reply to Mulin Yuan
    Prodigy 170 points

    Greetings of the day!

    It is a lithium-ion battery with nominal voltage of 11.1V and full charge voltage of 12.6V. After regulation, the 12V will be supplied to different sensor and actuators withing the system.