• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 41 subscribers
  • Views 479 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.

TIDA-00893: TCAN1042 supply current

Hiroshi Sato98
Prodigy 180 points
Part Number: TIDA-00893
Other Parts Discussed in Thread: ISOW7841, TCAN1042-Q1, SN65HVD256

Hello,

Our customer trying isolated can circuit based on TIDA-00893.

We can see that ISOW7841 can supply 130mA max to load in this.

However, TCAN1042 requires 180mA supply current when " Normal mode(dominant – with bus fault)" ,  in the datasheet.

Does this ref design not support bus fault condition ?

If we want to support this too, we have to change power circuit design ?

Thanks,

 

  • 0
    TI__Guru 62920 points
    Hello Sato-san,

    The 180 mA value in the TCAN1042-Q1 datasheet is a bit too generous. The actual value will be less than 130 mA. We are working on a datasheet update now that would reduce the maximum limit on this parameter. The output current of ISOW7841 should be sufficient for the TCAN1042-Q1.

    If you have any questions please let me know.

    Regards,
    Max
  • 0 in reply to Miguel Robertson
    Prodigy 180 points

    Hello Max-san,

    Thank you for your comment, I understand.

    Actually the customer trying to use SN65HVD256, please consider to update this datasheet too.

    Thanks and best regards,

    Sato

  • 0 in reply to Hiroshi Sato98
    TI__Guru 62920 points
    Sato-san,

    Only the TCAN1042 could support the lower current value; the SN65HVD256 will have higher current in this condition because its output current limit under short-circuit conditions is higher. If the CAN device consumes higher current it may cause the power rail to droop and lose functionality. This may or may not be a concern for a given application depending on whether the voltage rail is used to power any other components.

    Regards,
    Max
  • 0 in reply to Miguel Robertson
    Prodigy 180 points
    Hello Max-san,

    Thank you for your comment, I understand.

    I'll ask the customer to consider that and change their design if it is required.

    Thanks and best regards,
    Hiro