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BQ27421-G1: Preliminary Questions Before Selecting Device

Laura Shuey
Intellectual 810 points
Part Number: BQ27421-G1
Other Parts Discussed in Thread: BQ27Z561-R1

  • Battery chemistry compatibility for fuel gauging (especially important compatibility with LiFePO4 batteries), is this part compatible with LiFePO4?
  • Component learning process for fuel gauging:
  • does the component require a preliminary characterization of the battery?
  • if yes, what would be the effort required?

  • 0
    TI__Guru** 105740 points

    Hello Laura,

    I would recommend looking at the bq27z561-r1, this gauge supports the LiFePO4 battery chemistry.

    The gauge is impedance track so you will need to characterize the batteries by performing a discharge and charge cycle and using the CPCCHEM tool. This will give you the chemID to upload to the gauge.

    Sincerely,

    Wyatt Keller