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BQ77915: BQ77915 conections

Gr K
Prodigy 10 points
Part Number: BQ77915

Good afternoon. Interested in BQ77915. It is necessary to connect 7 liPo4 batteries in hibernation mode enable. Couldn't find a setting resistors Rin, Rgs_chg, Rdsg, Rsns, and the MOSFET parameters for correct operation of the device.

  • 0
    TI__Guru 54715 points
    Hi Gr K,
    See table 8 in the bq77915 data sheet for resistor parameters and section 10.2 for description of the design process for selecting values. FETs should be selected for the voltage, about 2X your charge voltage and the current from the pack. You must also consider the heating of the FETs and power dissipation in your design, the FET package and mounting style are part of that decision. The switching speed and load of the FET may affect Rdsg.