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TCAN4550: TCAN4550

jayashree
Intellectual 680 points
Part Number: TCAN4550

Hi Team,

I am using TCAN1042HVDRBRQ1 in one of my design, in the datasheet it is mentioned that the IC is fault protected, which means during error or fault cases the transceiver will still be able to transfer the data in CAN bus acting as single wire CAN or it is only fault voltage protection.

With regards,

Jayashree.

  • 0
    TI__Guru 50795 points

    Hi Jayashree,

    Bus fault protection refers only to the physical protection offered by the CAN bus to bus shorts. This device does not offer single wire CAN support. However, in many systems certain faults can be tolerated with only degrigated conditions, but still allow communication to pass. This can include shorts from CANH to Vcc, CANL to ground, and some other weak shorts. 

    Let me know if you have any more questions.

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    Intellectual 680 points

    Hi Eric,

    Thanks for the update.

    This IC cannot allow the communication to pass in fault condition right. Please confirm whether my understanding is correct.

    With regards,

    Jayashree.

  • 0 in reply to jayashree
    TI__Guru 50795 points

    Hi Jayashree,

    This will depend on the fault condition and some system characteristics. There is no separate protocol of mode for communicating on a faulted bus. If a fault occurs on the bus, the transceiver may attempt to continue communicating. If the driving node determines that it cannot properly drive the bus, it should cease attempts to send information. 

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    Intellectual 680 points

    Hi Eric,

    Eric Schott1 said:
    However, in many systems certain faults can be tolerated with only degrigated conditions, but still allow communication to pass.

    I want to know whether the above feature is supported by TCAN1042HVDRBRQ1 and TCAN4550RGYR or not.

    With regards,

    Jayashree.

  • 0 in reply to jayashree
    TI__Guru 50795 points

    Hi Jayashree,

    The conditions I'm referring to will have similar consequences with any CAN transceiver. During the listed faults, the differential signal may be maintained. This would allow the receiver to correctly interpret the information on the bus, even with the fault present. However, other faults may compromise the differential signal and make typical CAN communication impossible. During such cases, there is no secondary fault or one-wire mode for these transceivers. 

    Regards,
    Eric Schott