• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 413 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ34Z100-G1: Can the Fuel Gauge be powered down when the device is?

Ben Artes
Prodigy 10 points
Part Number: BQ34Z100-G1


We're looking at using a BQ34Z100-G1 in an NiMH based design.  The product will be completely powered down with a switch that disconnects the MCU and associated electronics.  Is there any disadvantage to cutting power to the BQ34Z100-G1 when the system is powered down?  I believe it will store the current battery charge in Non-Volatile memory along with other configuration information (Cell parameters etc) and that on power-up it will perform an FCC Simulation to determine any self-discharge etc.  Is this correct?

The other option would be to leave the Fuel Gauge powered with the MCU and everything else powered down so that the Fuel Gauge can get a better OCV Reading. Does this provide a significant advantage?

Thanks,

Ben Artes

ULC Robotics

  • 0
    TI__Mastermind 25955 points
    Hi Ben,

    One major benefit to keeping the bq34z100-g1 powered at all times is that it will allow the device to capture OCV updates when the battery is rested. Rest occurs when the system is not under load. Capturing these periods of rest/relaxation are extremely important for the proper operation of the gauge.

    The device does not use too much energy and also has sleep and deep sleep modes.

    Sincerely,
    Bryan Kahler