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Original question:

BQ40Z50: BAT pin solution for 1S applicaiton

BQ40Z50: BQ40Z50: bq40z50 1s

Beginner
Intellectual 2281 points
Part Number: BQ40Z50

To follow up https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1096120/bq40z50-bat-pin-solution-for-1s-applicaiton

May I double confirm with you the R9 change to 10ohm in 1S application is the same reason? 

  • 0
    TI__Guru** 104905 points

    Hello Beginner,

    I'm not sure I follow the question, it looks like you linked the same part number?

    For 1S designs the diode must be replaced with a resistor for the BQ40Z50 for the reasons mentioned in the other post.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    TI__Intellectual 2281 points

    Sorry for confused. I know the diode must be replaced because original design is to block reverse current. 

    How about the purpose to replace R13 to 10ohm?  

  • +1 in reply to Beginner
    TI__Guru** 104905 points

    Hello Beginner,

    Both should be replaced because the lower voltage supplied to the gauge, with R13 at 100ohm the voltage drop across this resistor could cause supply issues for powering the gauge.

    Sincerely,

    Wyatt Keller