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TPA3255: Heatsink Grounding

Nishka Rao
Intellectual 1306 points
Part Number: TPA3255

Hi Audio Team,

1) Does the heatsink on the TPA3255 need to be grounded?

2) Does the heatsink need an electrical connection to the "power pad" on the top of the IC, thus grounding the "power pad"?

2b) The answer to question 2 is yes, do we have any recommendations on a thermal interface material (pad or paste) that is electrically conductive and has good thermal performance?

Thanks so much!

  • 0
    TI__Expert 5670 points

    Hi Nishka Rao.

    About your questions.

    Nishka Rao said:
    1) Does the heatsink on the TPA3255 need to be grounded?

    Yes, Heatsink need to be grounded.

    Nishka Rao said:
    2) Does the heatsink need an electrical connection to the "power pad" on the top of the IC, thus grounding the "power pad"?

    Power pad doesn't need to be grounded, you can use ordinary thermal grease to connect the PAD and Heatsink.

    Heatsink can use screws to connect to the GND in the PCB.

    BR.

    Wei Qiu.