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AM5728: Thermal phase change material

Yevgeny Virin
Prodigy 40 points

Part Number: AM5728

Hello,

I wondered if you have recommendation for thermal pad to be used with AM5728.

The heat sink manufacturer recommends on TPCM 585. 

Please confirm or provide a better substitute.

Thank you,

Yevgeny Virin.

  • 0
    TI__Genius 13515 points

    Hi Yevgeny,

    Looking at the material datasheet, this looks good, and will work within the thermal envelope of the processor.

    Did you have any specific concerns for your application?

    Regards,
    Mike

  • 0 in reply to Michael Erdahl
    Prodigy 40 points

    Thank you, Michael, for your comment.

    My concern was that tpcm 580 series is with same thermal resistance on 0.005, 0.008 and 0.010" THK. ( 0.02 C in^2/W)

    By taking heat sink 40x40mm with forced convection (~ 2.2 C/W )  , I have not a very big safety margin.  (T ambient = 50 C , Power =10.5w)

    The power consumption is under question:

    I wondered, if you can advice regarding it please.  According to power consumption datasheet, Dhrystone - Dual Core  and  Graphics - 3D Chameleon Man  consume together :10.5W.

    Is this a maximum consumption predicted or it can be higher? 

    http://www.ti.com/lit/an/sprac79/sprac79.pdf

    Thank you,

    Yevgeny.

     

  • 0 in reply to Yevgeny Virin
    TI__Genius 13515 points

    Hi Yevgeny,

    We cannot add two benchmarks together to arrive at total power consumption when both use cases are active.

    If we use Dhrystone as the baseline, take a look at the voltage domains where power did increase running the Chameleon Man benchmark, such as GPU and DDR, and add the delta as a rough approximation for power consumption running both benchmarks simultaneously.

    Regards,
    Mike

  • 0 in reply to Michael Erdahl
    Prodigy 40 points
    Hi Mike,
    Thank you for the advise. Indeed the 10.5 W was exaggerated parameter.
    I used Dhrystone as baseline and added the deltas. Eventually the total power stands on 7246 mW.

    Best Regards,
    Yevgeny.