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BQ77915: schematics review support

user5161537
Prodigy 20 points
Part Number: BQ77915

Dear TI Engineer,

Could you kindly help to review attached schematics? Thanks a lot.

BQ77915 4S.pdf

  • 0
    TI__Expert 7465 points

    Hi,

    I reviewed your schematic, and it looks pretty good! I do have some comments:

    • Rgs (R17 in your schematic) should be 1M Ohm, not 10M Ohm.
    • RCHG (R15 in your schematic) should be 1K Ohm, not 5K Ohm.
    • Rcb (R1x, 2x, etc in your schematic) is used to control the cell balancing current. The current will be the cell voltage divided by Rcb. Your value looks good. If you would like slower or quicker balancing, change this resistor value. This can be confusing in the datasheet. 

    Let me know if you need anything else!