• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 32 subscribers
  • Views 1349 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TCAN1042HGV: some questions about CAN bus fault protection

Frank Xiao
Genius 12055 points
Part Number: TCAN1042HGV

Hi team,

My customer wants to use the device TCAN1042HGV for CAN interface. Could you please help share more information about Bus Fault? What will happen when it trigger the Bus Fault protection? What's the advantages of the feature?

For the ICC current below. why the bus fault mode current is 180mA? which is larger. For normal working condition without bus fault the current will be 80mA, correct?

Thanks.

  • 0
    TI__Guru 71792 points

    Frank,

    Bus-fault protection is referring to absolute maximum voltage rating on the CAN bus in case the CAN bus shorts to battery. It just means that if the CAN bus is exposed to extreme voltage conditions (+/- 58V for non-H version, +/- 70V for the H version) than the pins and device will not get damaged.

    The parameter for dominant with bus fault condition is the rare case where the CAN bus is driving dominant while it becomes shorted to battery and battery has reverse polarity. This is a very unlikely case, but even if it were to occur it would be for a short period of time because dominant timeout would release the bus from driving dominant, and with reverse polarity on the battery the CAN transceiver would no longer be powered on.

    Please let me know if you have any other questions.

    Regards,