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DRV8874-Q1: Customer is requesting Driving current versus ambient temp curve

Paul Yeh
Genius 14105 points
Part Number: DRV8874-Q1
Other Parts Discussed in Thread: DRV8876-Q1

Hi team,

My customer is asking for peak driving current versus ambient temp curve.

They would like to know the driving current variation when TA temp increased?

But there is no this kind of information in datasheet, so please help.

BTW, they also ask for DRV88776-Q1 as well.

Thanks

  • 0
    TI__Mastermind 28295 points

    Hi Paul,

    Thank you for your question. Could you point out which spec item customer is looking for? Could you point out on datasheet?

    regards

    Shinya Morita

  • 0 in reply to Shinya Morita
    TI__Genius 14105 points

    Shinya,

    In our datasheet, we just mentioned the output current capability in page1 and there is no figure in datasheet to show this output current capability variation versus temperature.

    Ex: how about the output current capability when TA=105'C, is it still 6A or lower?

    Customer is asking figure for checking.

    Thanks

  • 0 in reply to Paul Yeh
    TI__Mastermind 28295 points

    Hi Paul,

    Current peak you pointed out is directly connected to I_OCP (Overcurrent protection trip point) min value on datasheet page 7. This SPEC goes by TJ. -40C =<Tj =< 150C. If Ta is higher, then Tj also gets higher. However I_OCP min 6A as long as Tj=<150C.

    Peak is 6A however continuous output current varies by Ta - just FYI. Please refer 8.2.1.2.2 Power dissipation and output current capability on Datasheet page 21. It shows how Ta impact to continuous output current capability.

    DRV8876-Q1 is also same.

    regards

    Shinya Morita