• State TI Thinks Resolved
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 11 views
  • Users 0 members are here
Support feedback
Options
Options
Related

Original question:

TCAN1044A-Q1: error frame detect at heavy load communication

TCAN1044A-Q1: Cannot communicate under maximum load condition

Bengi Long
Intellectual 2190 points
Part Number: TCAN1044A-Q1

Tool/software:

Hi team,

Below is the test setup for my TCAN test, and I cannot communicate with μc under maximum load. CAN baud rate = 500Kbps, CANFD baud rate = 500K in arbitration domain and 2M in data domain.

I would like to know:

1. What is the maximum load of our DEMO or this IC?

2. How can I improve this?

Feel free to your feedback!

BR,

Bengi

  • 0
    TI__Guru 50306 points

    Hi Bengi,

    1. This dependents on the topology (star vs line), total cable length, capacitance, number and type of nodes, stub lengths, termination, data rate etc. Please see the below appnote for more information.

    Top Design Questions About Isolated CAN Bus Design (Rev. B)

    2. The higher the data rate, the lower the allowable bus length, capacitance etc. I would recommend depopulating C1, C2, C3 to verify. Especially C3 as I am unsure of the intent.

    You may also verify for a single linear trunk with short stubs by powering down any additional nodes one by one, with a star topology. Hence, recommend to avoid star topologies if the case and see section 9.2.2 of the data sheet for a more detailed design consideration, thanks.

    Best Regards,

    Michael.