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TMS320F28076: Are there current consumption graphs during room temperature?

Aki Li
Genius 10115 points

Part Number: TMS320F28076

Customer would like to compare the power consumption between F28076 and F280049. In the F28076 datasheet, the current consumption graphs are based on high temperature(Figure 5-1. Operational Current Versus Frequency), while F280049's are based on room temperature. Could you please help check whether there are internal data with room temperature for F28076? Thank you.

  • 0
    TI__Guru 62975 points

    Aki,

    They can use figure 7-3 from the datasheet to estimate the TYP power consumption:

    -Tommy

  • 0 in reply to tlee
    TI__Genius 10115 points

    Hi Tommy,

    I noticed this graph was based on HALT mode, not for operational mode.

  • 0 in reply to Aki Li
    TI__Guru 62975 points

    Aki,

    The total power for any use scenario is comprised of:

    Total Power = Active Power + Static Power

    Active Power comes from switching losses as internal logic changes states. This is directly related to peripheral usage, clock gating, and operating frequency.

    Static Power comes from leakage losses from any logic that is powered on. This is directly related to temperature. This would also be related to isolated supply domains that can be turned off to save power (as in Hibernate Mode), but that's beyond this discussion.

    From the graph, you can read the Static Power at High Temp and subtract the difference of (High Temp - Room Temp) from Total Power to determine the equivalent power at Room Temp.

    -Tommy