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TLIN1021A-Q1: Is failing ISO7637-3 DCC Test

Mangesh Dhakane
Prodigy 10 points
Part Number: TLIN1021A-Q1
Other Parts Discussed in Thread: STRIKE

Hello Team, I have used the TLIN1021A-Q1 transceiver in my design. While preforming the DCC Test at +/- 30V LIN communication stop and recover once the transients pulse is disconnected.

I have used the TVS diode PESD1IVN27-AX and ESD capacitor of 220 pF at LIN line close to bus connector. 

As per datasheet this device is compliant with DCC method, so can you please help me how this test is passed while testing and what are the protection circuits need to use?

Thanks & regards,

Mangesh

  • 0
    TI__Mastermind 26806 points

    Mangesh,

    Your results sound similar to expectations for DCC testing. Test houses like UL, which have certified this component for J2962-1 characteristics such as ±30kV DCC, compare pre-test performance and wave shape to post-test performance and wave shape. It sounds like your testing shows that both before and after the strike, performance is unaffected.

    Keep in mind that LIN communication is single-ended. A transient pulse from DCC testing can affect a waveform for longer than the length of a bit at 20kbps. This is not due to the transceiver but is rather a test definition. It would not be expected for receivers to be able to distinguish this bit state properly during reception.

    The detailed specifics of DCC and performance requirements are contained within SAE J2962 documentation which can be obtained on SAE's website. Texas Instruments uses third-party testing sites such as UL to evaluate these test specifications independently.

    Best,

    Danny