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BQ51052B: BQ51052B

andrea brambati
Prodigy 100 points
Part Number: BQ51052B

1: by using a NTC of 10K at 25° with B3977 can you help me to calculate the R1 and R3 value for charge between 0 to 45°

2: max charge current 300ma and 30 ma end of charge current, by using the data formula i 'd calculate R1 820R and Rfod 192 R and Ros 2,4Kohm, that is correct?

Thanks a lot and best regards

Andrea Brambati

  • 0
    Prodigy 100 points

    Good morning,

    i will wait for one answere.

    thanks a lot and best regards

    Andrea Brambati

  • 0 in reply to andrea brambati
    TI__Guru* 75656 points
    1: by using a NTC of 10K at 25° with B3977 can you help me to calculate the R1 and R3 value for charge between 0 to 45----Bill J -- I recommend R1 200 ohms and R3 152k ohms.

    2: max charge current 300ma and 30 ma end of charge current, by using the data formula i 'd calculate R1 820R and Rfod 192 R and Ros 2,4Kohm, that is correct?----Bill J -- R1+Rfod will set charge current at about 300mA, the values are correct for charge current. But FOD value is TBD, need to run fod cal on the unit to set Rfod and Ros
    Note that 30mA end of charge may be too low. The accuracy of end of charge decreases with lower currents. 50mA would be safer.