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IWR1443BOOST: Average power of level sensing demo?

feng tang
Genius 3595 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: TIDEP-0091, IWR1443

Can any one give the calculation of the "average power" for level sensing demo with Iwr1443boost and MSP432? please use the information on page 12 and page 13 of  TIDER-009 reference design.

Thanks

  • 0
    TI__Mastermind 21025 points

    Hi Feng,

    The design document for the level sensing demo is TIDEP-0091, is this what you are referring to?  I looked on ti.com and do not see a TIDER-009 reference design. Pages 12 and 13 of TIDEP-0091 show the power and energy usage of the first release of the demo.  Did you want to know the overall energy consumption?

      -dave

  • 0 in reply to db_woodall
    Genius 3595 points

    Hi Dave,

    Yes, TIDEP-0091 is what I am referring to, on page 13 it says the total power 246mWs, are you able to calculate the average power with the frame rate of 2Hz? We want to see if it meets the 4 mA to 20 mA  Hart requirement.

    Thanks and best regards

  • 0 in reply to feng tang
    TI__Mastermind 37500 points
    Hello Feng,
    We are currently working on the revision to the power, from Dave's coding. I don't have power numbers for the MSP432, I am currently measuring the IWR1443, modified for less power consumption.

    Here are the things I think you will need to lower the power further from 246mj for level sensing.
    a) the IWR1443 will have a new release called ES3, that will have the BSS firmware in ROM instead of QSPI flash. The ES3 version will also
    utilize the QSPI at 40Mhz clock instead of ES2 18Mhz clock. this is coming in 2018.

    b) Dave's code changes and research with the Radar Firmware team has lowered the power required significantly. This is now done differently than the TIDEP-0091. There is either a BOOT-CALIBRATE(factory) cycle or a BOOT-CALIBRATE/RUNTIME-MEASURE cycle. The current testing numbers on the TI EVM is 104mj over 155ms. It is not uniform power draw.

    c) the EVM for my measurement has to be carefully modified, as the LEDS, CAN, XDS110 are powered down to match a level sensing application.
    if you take an ES2 IWR1443 EVM, and modify it, we get today 104mj / measurement.

    There may be a lower power - power supply solution, we have not tested this yet.

    Here is a base power table from the 5v input, not including the MSP432. When the new version TIDEP-0091 is released it will have the details.
    BOOT
    1.3ms, .11A, 5v
    140ms, .125A, 5v
    RUNTIME CAL/ MEASUREMENT
    11ms, .205A, 5v
    1.6m, .4A, 5v
    .9ms, .23A, 5v

    Regards,
    Joe Quintal
  • 0 in reply to Radio-Joe
    Genius 3595 points
    Hi Joe,
    Thanks for the information, do you mean the boot time reduced from 140 ms to 1.3 ms? what are 11 ms, 1.6 ms and 0.9 ms referring to? How do I modify our ES2 to reduce the power? Do you have Dave's new "level sensing demo" codes, so we can test our boards?

    Thanks and best regards,
  • 0 in reply to feng tang
    TI__Mastermind 21025 points
    Feng, i will have the updated code ready soon, and I can get it to you, but I don't think it will be put on ti.com because it requires updates to the mmwavelink SDK library and BSS firmware (these updates will be available in the 1.1.0.0 SDK that should be released tomorrow). There have been a lot of improvements, the biggest one is that we now run calibration separately and store the data to flash. Then measurement bootups restore this data from flash and run a minumum calibration prior to the chirps. This new capability requires either adding another zero-ohm resister, or pressing the SW1 button while you command calibration to run from the uart terminal.

    -dave