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TPS2640: TVS diode between power pins, NC pins

Slawomir Zimny
Prodigy 10 points
Part Number: TPS2640

Hi,

I've got two questions regarding TPS2640 eFUSE. I noticed some discrepancies between the documentation for the IC and the evaluation board, hence the questions.

1. In the diagram of the evaluation board, a TVS diode (D8) is placed between the power IN and OUT pins. Is it necessary? Why was it added there?

2. In the same photo you can see that on the evaluation board some NC pins are connected to the RTN potential. The integrated circuit documentation states not to connect them. What does this eval board scheme mean? Should these pins be connected, and if so, which ones exactly?

Thank you in advance for all answers!

Slawomir Z

  • 0
    TI__Guru 54620 points

    Hi Slawomir,

    1. TVS between IN and OUT pin is to to clamp IN-OUT voltage below abs max. It can be useful for industrial applications which see surges on input.

    2. NC can be connected to RTN to improve thermal layout.

    Regards

    Kunal Goel