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BQ25731: BQ25731 for cell stack

Part Number: BQ25731

Hello:

Can the chip be setup for automatic detection of cell stack from 1 to 6?

If this is setup by a résister divider from VDDA- one would think  a charger with this chip can only be used for a stack preset .

This will be a huge loss to the functionality of the chip with all its capabilities.

would it be possible to dynamically let the chip firmware algorithm determine the stack voltage - including inputting via bluetooth? Would this include a lot of analog interface circuitry to add?

  • Hello Robin,

    Cell count is only determined through detection of the voltage at CELL_BATPRESZ pin at startup. The ChargeVoltage and VSYS_Min can be modified via register writes after startup.

    Below are the voltage threshholds on CELL_BATPRESZ used to determine the cell count.

    Thanks,

    Khalid