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TCAN1463-Q1: Testing waveform w/o CMC

Johnny Guo
Expert 4910 points
Part Number: TCAN1463-Q1
Other Parts Discussed in Thread: TCAN1043A-Q1

Hi, team,

We are promoting TCAN1463-Q1 in customer, some questions below may need your support to close.

1. If changing from TCAN1043A-Q1 to TCAN1463-Q1, do we need to consider the hardware and software design change?

2. For below testing waveform shown in slides, is it the result without common mode choke?

Customer's current application is still CAN FD @2Mbps, and would like to reserve for 5Mbps, they want to upgrade from TCAN1043A-Q1 to TCAN1463-Q1, want to check if the CMC can be deleted for lower cost, since they put CMC in design for TCAN1043A-Q1 right now.

  • 0
    TI__Mastermind 22885 points

    Johnny,

    Johnny Guo said:
    We are promoting TCAN1463-Q1 in customer

    Great to hear!

    Johnny Guo said:
    1. If changing from TCAN1043A-Q1 to TCAN1463-Q1, do we need to consider the hardware and software design change?

    No changes needed when switching to the SIC version. You can put the TCAN1463-Q1 in place of the TCAN1043A-Q1.

    Johnny Guo said:
    2. For below testing waveform shown in slides, is it the result without common mode choke?

    Unfortunately I cannot say 100% whether CMC was used or not, but I believe these images were taken without CMC using just a square wave on TXD. Both images were taken in the same network (only the transceiver was changed).

    Johnny Guo said:
    Customer's current application is still CAN FD @2Mbps, and would like to reserve for 5Mbps, they want to upgrade from TCAN1043A-Q1 to TCAN1463-Q1, want to check if the CMC can be deleted for lower cost, since they put CMC in design for TCAN1043A-Q1 right now.

    CMCs help handle common-mode noise. The advantage of SIC is that it reduces differential ringing or differential noise on the dominant-to-recessive edge of the signal, where the arrows are pointing. It isn't directly connected to whether they'd need a CMC or not.

    The devices do not require a CMC in implementation. This is true for both TCAN1043A-Q1 and TCAN1463-Q1. Common-mode chokes are used to improve EMC and immunity if the system needs it.

    Best,

    Danny