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TPS2549: Thermal Pad affects Eye Integrity

Kenichiro
Mastermind 9165 points
Part Number: TPS2549

[ TPS2549/TPS2549-Q1 ] Thermal Pad affects Eye Integrity?

Hi,

My customer does not connect the thermal pad of TPS2549 to their PCB board.
Do you think this affects to high-speed eye integrity?



I suppose that the thermal pad needs to be connected from thermal performance point,
however not sure if it's important to high speed performance perspective.

Thank you for your support in advance.
Regards,
Ken

  • 0
    TI__Guru 50120 points

    Hi Ken,

    If the thermal pads of the device does not connect to the PCB board, the temperature of the device is expected to go up. With an increase in temperature, there will always be a possiblility that the device is functioning out of spec and not follow the recommended electrical characteristics. This correlation can potentially affect the high speed performance of the device which would greatly impact the high speed eye diagram test.

    TI recommends connecting the thermal pads of the device to the PCB. Is there a reason why the customer chose not to do this?

    Regards,

    Jimmy Hua

  • 0 in reply to Jimmy Hua
    Mastermind 9165 points
    Hi Jimmy,

    Thank you for your reply! ask customer to connect thermal pad to their PCB for heat dissipation.

    Regards,
    Ken