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TLIN1029A-Q1: Estimate power consumption

Atsushi Hirai
Expert 5530 points

Part Number: TLIN1029A-Q1

Hi team,

My customer is calculating the power consumption of his board.

Could you explain how to calculate the power consumption at TLIN1029A-Q1?

I think the power consumption of internal circuitry is

Ploss=VSUP*ISUP(dominant)*0.5 + VSUP*ISUP(recessive)*0.5

And I think the worst case power consumption of open drain FET during dominant is

Ploss=(VSUP-Vf-VSUP*0.2)/1kohm * VSUP*0.2 (Pull-up current goes into the FET and the voltage is VOL max)

But I don't have a confidence. Please give me your advice.

Regards,

  • +1
    TI__Mastermind 26836 points

    Hirai-san,

    It looks to me like you are thinking correctly. Of course, RXD is also sinking current, but this power consumption is not usually the biggest contributor.

    I am assuming Vf is the voltage drop across your commander node serial diode.

    Best,

    Danny