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TCAN1042HG: Dominant with bus fault in TCAN1042

Oliver Ou
Intellectual 2845 points
Part Number: TCAN1042HG

Hi Team,

For input current Icc of TCAN1042, we give a 180mA at dominant with bus fault condition.

from the spec, this Icc current would appear with CANH= -12V? Customer wants to know why we define this spec?

Because, the maximum BUS voltage range is +/-58V(with 'H suffix).

Dose it mean the Icc current would increase with higher bus voltage but IC would not damage within +/-58V? 

For normal application, we only need to consider 80mA maximum supply current. is it right?

Thanks. 

  • 0
    TI__Guru 74282 points

    Oliver,

    The specific parameter is a worst-case condition where the battery voltage in a vehicle is reversed, and the bus is shorted to it while the bus is driven dominant. It is a very rare condition, and it's to show the current-limiting in case that worst-case situation occurs. It is sized to 12V since that is the standard voltage for a car battery, and CAN's primary applications are in automotive vehicles.

    For normal application, yes, you only need to consider 80mA. 

    Please let me know if you have any other questions.

    Regards,