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BQ27531 direct link to BQ2419x charger family

David Wang11
Expert 7400 points

For the BQ27531 fuel gauge, what the benefits are to having it directly linking to the BQ2419x family of chargers without the need to connect the 2419 IC to the host.  How and what does the BQ27531 control the 2419x, what level of automation? Are there any issues with 4.1v charging with this part? Also, are there any known app notes to help with implementing/integrating this part in a system?

The customer is trying to decide between the 27531 or the use of a non-direct link charger-gas gauge circuit

  • 0
    TI__Genius 10235 points

    The bq27531 fuel gauge works with the bq2419x family of chargers. It will provide completely autonomous control of the bq2419x charger. No host intervention is needed with the charger. Also, there should be no problem charging a 4.1V battery with this device. The charger settings are completely configurable through the gauge using Gauge Studio and bqConfig. The TRM contains information for configuration and use. bqConfig is the tool used for configuring the data flash settings and is located in the product folder.

    Product Folder: http://www.ti.com/product/bq27531-g1

    TRM: http://www.ti.com/lit/pdf/sluua96

     

  • 0 in reply to Chase7071949597
    TI__Expert 7400 points

    Thanks for the response

    What are the main benefits of having a fuel gauge like the 27531 directly linked to chargers, so there is no host intervention needed? i would suspect that the code needed to interact between the two would be not as complex. I was informed that it also would make the charging profile more ideal, is this correct? Anything else?

     

  • 0 in reply to David Wang11
    TI__Genius 10235 points

    In addition to full autonomy, the gauge can also instruct the charger to perform different charging profiles, such as JEITA or TI's Max Life profile. Standard CCCV profiles can also be utilized as well, if that is all that is desired.