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BQ76940: What is the function difference between BAT pin and REGSRC pin

Miles Li1
Intellectual 1640 points
Part Number: BQ76940

Team,

Customer is asking what is the function difference between BAT pin and REGSRC pin? What kinds of power sourced from separately from BAT pin and REGSRC pin?

Wish to get your reply as soon as possible. Thanks!

  • 0
    TI__Guru 54715 points

    Hi Miles,

    BAT and REGSRC are different power pins on the BQ76940.  VC5X and VC10X are also power pins.  VC5X, VC10X and BAT are voltage supply pins for a manor portion of the IC including the ADC section of the 3 cell groups.  REGSRC is described in the pin function table as "Input source for output LDO", it provides power for the FET drivers, interface signals and REGOUT.  The current monitoring circuits for SCD, OCD and the CC are also powered by REGOUT.   Appropriate power must be connected to all the power pins.