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TLIN1028-Q1: LIN TxRx ESD withstanding analysis

Sri Viswa Sathiamoorthy
Prodigy 205 points
Part Number: TLIN1028-Q1

Tool/software:

Hi,

We are simulating the impact of LIN filter on ESD pulses.

One of the requirement is to have ESD pulse of +/- 4kV, 330ohms, 150pF pulse on contact pin of LIN (unpowered condition).

Schematics:

We have observed following voltage and current injection into LIN transceiver. Can you please help to tell if LIN TxRx can handle this without damage?

Thanks,

Sri Viswa

  • 0
    TI__Guru 52166 points

    Hi Sri,

    The LIN pin is specified for up to ± 58 V. Hence, no concerns for ± 20 V. However, 10 - 12 A of current entering the IC pin should be unsafe and would recommend for the surge current to be shunted by the TVS and the current entering the IC limited by series resistance (increase R4 to 10-33 ohms or higher), aiming for < 0.2 A entering the IC pin.

    I.e., IEC pulses are primarily handled by external protection - the TVS and the network in front of the pin and whether it is safe would depend on how much of the current actually enters the IC pin vs being shunted by the TVS /  series resistor. Hence, the LIN pin is not intended to conduct such surge current and the external TVS should be clamping, leaving only a few hundred mA (brief) reaching the IC, thanks.

    Best Regards,

    Michael.