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TCAN1042-Q1: Power consumption vs speed of TCAN1042-Q1

Akshat Garg
Intellectual 1040 points
Part Number: TCAN1042-Q1

Can you comment on max power consumption vs speed of TCAN1042-Q1 - Icc dominant for device at 5V.

Datasheet says 80mA max. Need to know whether same is applicable only if I run it at higher baud rates for CAN-FD applications or same is applicable throughout the series.

We will be using it for classic CAN application max till 1 Mbps.

  • 0
    TI__Intellectual 2090 points

    Hi Akshat,

    The ICC dominant parameter is applicable whenever the transceiver is in the dominant state, regardless of data rate.  You can estimate the average current consumption for CAN communication if you follow the formula below:

    ICC(AVG) = %Transmit × [(%REC_Bits × ICC_REC) + (%DOM_Bits × ICC_DOM)] + [%Receive × ICC_REC]

    This formula takes into account the amount of time dominant, the amount of time recessive, and the amount of time in receive-only state (also recessive).  

    So it is true that the maximum current that you will see is 80mA during normal operation dominant bits (assuming their isn't a short-circuit fault).  But this formula helps you to estimate an average power consumption too, which may be a bit more data rate and transmission dependent.

    Best Regards,

    Max Megee

    TI Transceiver Interface