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TMS320F28384D: The System Current Consumption.

Luke Chen
Expert 4860 points
Part Number: TMS320F28384D

Hi champs,

In datasheet, we list the IDD current value in system current consumption table, typical value is 288mA and maximum value is 475mA.

We list this current value by using device full functions, my customer wants to know what cause the BIG difference between typical and maximum current values.

Please advise your comments, thanks for help.

Regards,

Luke

  • 0
    TI__Genius 11951 points

    Hi Luke, the typical value is meant to indicate operation at nominal voltage, temperature, and process conditions.  All three of these parameters contribute to the max current consumption.  Please see the datasheet Current Consumption Graphs for how voltage and temperature contribute, the rest can be attributed to process variation.

    regards, Joe

  • 0 in reply to Joe Prushing
    TI__Expert 4860 points

    Hi Joe,

    In the figure of Typical Operating Current Versus Temperature, I don't see the IDD current consumption up to 475mA maximum and this is the question from my customer.

    How should I respond this question please?

    Regards,

    Luke

  • +1 in reply to Luke Chen
    TI__Genius 11951 points

    Hi Luke, the figure you mention is based on silicon from the nominal process condition, but our specs include margin considering the full possible variation within acceptable manufacturing process corners.  The figure shows typical behavior of IDD with respect to temperature and voltage, but the delta between what is shown in that figure and the max spec are due to this third parameter 'process variation'.  In other words, the max spec represents the possible current at the worst-case voltage, temperature, and process corners.  I hope this clarifies the concern for your customer, if not let me know.