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AM4376: POH rating

Stuart Baker
Genius 10830 points

Part Number: AM4376

I'm working with a customer who is interested in understanding how we might improve our POH rating by running the device at a lower temperature and operating frequency than specified in the datasheet.  We know that a decrease in operating frequency and/or junction temperature typically corresponds with an increase in POH.

The specific use case is continuous operation at 70C and 1 GHz (Nitro) or 70C and 800 MHz (Turbo).

Is there any effect that running at a different core voltage (higher or lower) would have on improving POH?

Thanks,

Stuart

  • 0
    TI__Guru**** 393215 points
    The factory team have been notified. They will respond here.
  • 0
    TI__Guru* 85955 points

    Hi Stuart
    I will be forwarding this request to the quality team to see how best we can handle. We have been exploring on potential ways handling such requests for higher than standard 100 K POH with some generic guidance or self serve collateral (with disclaimers) instead of addressing specific request. This work will likely take some time and will be device dependent.

    General concepts are in the following application note
    http://www.ti.com/lit/sprabx4
    However these concepts do not lend well to 28nm (AM57x and KS2 family) and as mentioned in the application note this is not applicable to overdrive modes specified in the datasheet.

    While I figure out the best way to address your specific request, feel free to send me further details offline on the customer , the timelines when you need this and what is their desired POH requirements.

    Additionally do you further clarity on whether it will be Turbo or Nitro mode , this may help.

    Regards
    Mukul

  • 0
    TI__Guru*** 125430 points

    Stuart Baker said:
    The specific use case is continuous operation at 70C and 1 GHz (Nitro) or 70C and 800 MHz (Turbo).

    Is 70C the junction temp or ambient temp?

    Stuart Baker said:
    Is there any effect that running at a different core voltage (higher or lower) would have on improving POH?

    Lowering the voltage (e.g. operating at a lower OPP) will improve lifetime.  It also makes it easier to keep the junction temp down.