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TCAN332: Chokeless

Kai Hsiao
Guru 12675 points
Part Number: TCAN332
Other Parts Discussed in Thread: TCAN1051

HI Sir 

May I know TCAN33x support chokeless ?

or 

Which TCAN series support chokeless ?

  • 0
    TI__Guru 74252 points
    Kai,

    A choke isn't required for the CAN transceiver and communication to properly function, it just helps deal with any high frequency noise that may show up on the bus due to the power supply, or some other circuit in the system with the CAN transceiver.

    In general, all of our transceivers support chokeless operation for classic CAN and CANFD. Using a choke with CANFD helps tremendously with electromagnetic emissions for certification purposes, but CANFD still operates correctly without a choke on all of our devices.

    Please let me know if you have any other questions about CAN.

    Regards,
  • 0 in reply to Eric Hackett
    Guru 12675 points
    HI Eric

    Sorry I have a little confuse
    I saw TI have a white paper show TCAN1042 can pass the EMI test without output common choke
    Do you mean all of TI CAN transceiver include NXP can pass EMI test without output common choke?

    Thanks
  • 0 in reply to Kai Hsiao
    TI__Guru 74252 points

    Kai,

    Chokes help with high frequency noise on the bus, they are not necessary for operation. Chokeless implies that the transceiver can pass the major OEMs EMI specification without a common-mode choke.

    The TCAN1042/TCAN1051 passes the major OEMs EMI tests without choke, therefore chokeless. In that respect, TCAN332 is not chokeless.


    One question, what do you mean by "TI CAN transceiver include NXP"?

    Regards,

  • 0 in reply to Kai Hsiao
    TI__Guru 74252 points
    Kai,

    Please note the correction in my previous post.

    Regards,
  • 0 in reply to Eric Hackett
    Guru 12675 points
    HI Eric

    Sorry

    I saw the video as below ,TCAN33x can do the same thing?
    www.youtube.com/watch
  • 0 in reply to Kai Hsiao
    TI__Guru 74252 points
    Kai,

    No, we don't have data to support that the TCAN33x can pass that emissions test with a common mode choke. Some measurements could be taken sometime next week, but previously we have had to use a common mode choke with the TCAN33x to get to passing emissions levels.

    Regards,