• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 62 subscribers
  • Views 446 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.

Option to default 100% of ILMD to NAC on POR for BQ27x10EVM?

Christy Swartz
Prodigy 50 points


Hi Tech Support,

I am using the BQ27x10EVM. Is there any way that it can be configured such that on POR, NAC defaults to 100% of ILMD? The default for NAC on POR is 0, and I don't want to have to enter a "DONE" command every single time a new battery is put in. I am using primary batteries, so using the taper current settings isn't an option. 

Any help would be much appreciated.

Thank you,

Christy

Cypress Envirosystems

  • 0
    TI__Genius 14985 points

    Sorry, but it can't be configured to report 100% on POR.  The bqJunior gauges are extremely stripped down and optimized gauges with a minimum feature set to keep power and cost low and the features were targeted to work best embedded in a rechargeable battery pack.  Although you can use them for primary batteries as you are doing, some workarounds are required.

  • 0 in reply to dMax
    Prodigy 50 points

    dMax,

    Thank you for the quick response and the information. Are there any models of gas gauges that do allow for (can be configured to have) 100% on POR for single cell primary batteries (around 3.3V)?

    Thanks,

    Christy

  • 0 in reply to Christy Swartz
    TI__Genius 14985 points

    Hi Christy,

    Unfortunately I can't think of another gauging IC that initializes to 100% on POR for a 3.3V primary cell.  Our Impedance Track gauges initialize based on voltage, but they only have profiles available and work with rechargeable Lithium cells with the higher voltages.

    Is there a reason you can't initialize the bqJunior yourself with the DONE command?  Perhaps we can come up with another workaround.  Will your system not power on unless the gauge reports non-zero SOC?  Can you gate the decision with a voltage?

  • 0 in reply to dMax
    Prodigy 50 points

    Hi dMax,

    Right now we are using the EVM for testing purposes with our product. In the future, when the GG is integrated with our system, we will be able to send a DONE command. 

    Thank you again for the information and quick response time. It is much appreciated.

    Christy

  • 0 in reply to Christy Swartz
    TI__Genius 14985 points

    Hi Christy,

    Are you using the EVM with the PC-based evaluation software or are you using the EVM standalone?  Even if your test system can't send the DONE command yet, you should be able to simulate it by putting the I2C lines from the EV2300 to the bus and sending the DONE command from the EVSW Command menu when necessary.  Unless there is lots of other I2C traffic on the bus, you probably won't have a collision.