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TPS650941 Iccmax setting and current monitoring

Winnie Chan94
Intellectual 300 points
Other Parts Discussed in Thread: TPS51623

Hi,

in the previous discrete core solution, such as TPS51623 whcih have F-IMAX pin to set the maximum processor current and IMON to monitor the current, but i didn't find those pin on TPS650941, how to set iccmax and monitor current when using TPS650941, thanks!

  • 0
    TI__Genius 17380 points
    Hello Winnie,

    The F-IMAX and IMON are relating to the discrete IMVP8 implementation of the core rails.

    For the PMIC implementation, Intel has implemented a different system for monitoring current and setting maximum processor current internally to the SoC. Internal telemetry is utilized instead of the additional IMON circuitry / discrete components for the SoC. From the PMIC side, we have the ILIM pins which set the absolute maximum by using an inductor-valley current-limit architecture. More information on the PMIC implementation is included in Power Architecture Guide, IBL#558228.

    Thanks,
    Kevin LaRosa
  • 0 in reply to Kevin LaRosa
    Intellectual 300 points
    Hi Kevin,

    thanks for your reply!

    1. Could you explain more detailed about the way of current monitoring, how to acheieve?
    2. "Internal telemetry is utilized instead of the additional IMON circuitry / discrete components for the SoC", Is internal means SoC?

    Thanks!


    Winnie
  • 0 in reply to Winnie Chan94
    TI__Genius 17380 points

    Hi Winnie,

    I can elaborate:

    1.  Could you explain more detailed about the way of current monitoring, how to achieve? - The processor determines current usage using "architectural counters" within itself. I don't have detailed information about the actual method used by the SoC here though, Intel would need to provide information regarding their SoC IP.
    2. "Internal telemetry is utilized instead of the additional IMON circuitry / discrete components for the SoC", Is internal means SoC? - Correct, the SoC is handling the current monitoring, so the extra thermistors, caps, and resistors for the IMON is not needed. Intel does recommend implementing the Dynamic Platform and Thermal Framework (DPTF) though in order to ensure good PL1 performance. You will need to contact your local Intel FAE for more information on implementing DPTF (IBL#557619 seems like a good start).

    Let me know if you have any additional questions / need more information.

    Thanks,
    Kevin LaRosa

  • 0 in reply to Kevin LaRosa
    Intellectual 300 points

    Hi Kevin,

    Thanks for the reply!

    Winnie