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SN65HVD1050 Bulk Current Failure

Adam Gibson
Prodigy 10 points
Other Parts Discussed in Thread: SN65HVD1050

Anyone using CAN for automotive applications having or have had issues with bulk current? We are using a SN65HVD1050 on our products and we test to 100mA per ISO 11452-4. We run at 250kBaud and are seeing CAN drop-outs in frequencies <~20MHz. Typically the crash is unrecoverable without power cycle. I have found that other automotive companies (Ford, Chrysler, etc.) start with lower limits and go up to 100mA by 20-30MHz. Is there a documented reason why this is? Does anyone use a different TXR which allows higher testing?

  • 0
    TI__Guru 62910 points
    Hi Adam,

    It sounds like the limit line that you are referring to (that starts low at low frequencies and reaches a maximum in the 20-30 MHz range) is the one used by the SAE J2962-2 standard (which covers CAN transceiver requirements for North American OEMs). This is what we usually verify our CAN devices against. I don't have any data on HVD1050 versus this requirement, but I do have info for newer devices like SN65HVDA54x and SN65HVD55x. Please send me a note at m(hyphen)robertson@ti.com if you are interested in seeing any of the test data.

    Best regards,
    Max