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Have a question for TI re: The Internet of the Backyard Challenge? Ask here!

doctorcdf

This thread is dedicated to questions for the Internet of the Backyard challenge; Texas Instruments' staff will be monitoring it regularly.

 

Thanks!

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  • Hi!

     

    I have a question about energy saving mode.

    In my application the board could sleep for 5 min and then wake up to send data.


    I am trying to put CC3200 in hibernate mode (Examples Sensor_Profile and Hib) to reach the advertisized 1 year running time from 2xAA.

    If I measure current across jumper J12 it is 0.2 mA (decreases to 20uA with extra 100k pull resistors soldered to the serial flash chip).

    However the current drawn from 2xAA battery connector in hibernate mode is 0.64 mA with J13 removed (and unsoldered PWR and RESET LEDs).

     

    There is boost regulator 3.3V chip U8. I suspect it consuming this extra current. (Or I2C chips?)

    What is the purpose of boost DC/DC 3V3 U8? Is it supplied with a preproduction CHIP having a bug on the LAUNCHXL needing external DC/DC.

    Coil L4 belonging to ANA_2 pins on the demo board is not populated.


    With 0.6 mA could expect ca 3 months from AA cells but 20 uA would be great to have if possible.


    Greetings,

    Janis.




     



     


Reply

  • Hi!

     

    I have a question about energy saving mode.

    In my application the board could sleep for 5 min and then wake up to send data.


    I am trying to put CC3200 in hibernate mode (Examples Sensor_Profile and Hib) to reach the advertisized 1 year running time from 2xAA.

    If I measure current across jumper J12 it is 0.2 mA (decreases to 20uA with extra 100k pull resistors soldered to the serial flash chip).

    However the current drawn from 2xAA battery connector in hibernate mode is 0.64 mA with J13 removed (and unsoldered PWR and RESET LEDs).

     

    There is boost regulator 3.3V chip U8. I suspect it consuming this extra current. (Or I2C chips?)

    What is the purpose of boost DC/DC 3V3 U8? Is it supplied with a preproduction CHIP having a bug on the LAUNCHXL needing external DC/DC.

    Coil L4 belonging to ANA_2 pins on the demo board is not populated.


    With 0.6 mA could expect ca 3 months from AA cells but 20 uA would be great to have if possible.


    Greetings,

    Janis.




     



     


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