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TPD1E10B06: Transient Test Issue

Amanda Ross95
Intellectual 2740 points
Part Number: TPD1E10B06
Other Parts Discussed in Thread: STRIKE

Hello there,

I have a customer who is currently using one TPD1E10B6 on each of his (4) metal push buttons. The ESD diode sits in parallel with his push button (one node connecting to a GPIO on an MSP430, the other to ground). In order to test their effectiveness, my customer applies a 15kV transient via a probe to the metal push button as it is being pressed. The peculiar part is that after my customer applies this transient, the MSP430 resets which is unexpected seeing as the ESD diodes are rated for up to 30kV and should be rerouting that charge to ground. In you experience is there some other product that is better for a push-button application or could there be a mistake in the way we're configuring our transient scenario. Any feedback you can provide in our debug process for this would be helpful.

Thanks again,

-Amanda

  • 0
    TI__Genius 12410 points

    Amanda,

    So as I understand it you are pressing the button and striking the device when it is depressed?

    I would look at what the impedance is where you press the button. Ideally it should be 0 Ohms which would mean that the path of least resistance would be through the button and not through the ESD diode during an ESD strike. This is my best guess based on what you are saying so I would add a small resistance on the push button to steer the current away.

    Can you send me a schematic and where you are striking and perhaps the waveform showing the strike and the reset pin of the MCU.

    Regards,

    Cameron