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IWR6843ISK: ISK/IWR6843 power consumption

Guillaume Henri
Expert 4376 points
Part Number: IWR6843ISK
Other Parts Discussed in Thread: IWR6843, IWR1843, , TMP112, IWR1642

Hi mmwave champs,

When powering up the IWR6843 board directly (without using the boost kit) the consumption is already 330mA (3.3v) without starting to initiate the radio.

Q1 : Is such power consumption expected ?

Q2 : What does it correspond to in term of power consumption (CortexR4F only)?

Q3 : More generally, even if it is not specified in the datasheet yet, what are the expected power consumptions  on IWR6843 (no radio, 1 Tx/4 Rx, …)?

Q3bis : Should we expect similar consumptions shown on the IWR1843 datasheet?

Thank you!

Best regards,

Guillaume

  • 0
    TI__Guru 50240 points

    Hi Guillaume,

    I've asked an expert to look into this and we should have an answer for you in the next few days.

     

    Cheers,

    Akash

  • 0 in reply to Akash Gondalia
    TI__Mastermind 25835 points

    1)  In the IWR6843ISK board all the device supply (VIN_13RF1,VIN_13RF2, VIN_18CLK, VIN_VCO, VIN_18BB, VIN_SRAM, VOIN,VOIN_18, VOIN_18DIFF) are referred to 3.3V supply through the PMIC converter (LP8770) and LDO (TPS7A5301QRGRRQ1). 

    On this supply there are other components on the board are also attached (Such as QSPI flash, 4 No. of INA226AIDGST, Board ID EEPROM, TMP112 Temp sensor along with PMIC DCDC converter and LDO) all the quiescent currents are referred to 3.3V Supply.  

    Hence, that number could be expected. 

    2) It's hard to quantify, power of R4F alone. As there are so many peripherals, IP module, bus matrix, memory etc.. are all hooked up to the same supply. There is no dedicated supply domain for the processor alone, hence it's hard to isolate power alone for the R4F.

    3) Yes, detailed power measurements for the chip is under going characterization, Hence it's not yet published on the datasheet at this point in time. However to get the estimate of ball park numbers for different use-cases you could refer to below IWR1642 power calculator. 

    http://www.ti.com/lit/zip/swrm019

    4) For the use-case mentioned in the IWR1843, you could expect power consumption in IWR6843 similar lines as that of IWR1843 Datasheets. 

    Thanks and regards,

    CHETHAN KUMAR Y.B.