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bq24260 battery Detection

higa daisuke
Intellectual 900 points
Other Parts Discussed in Thread: BQ24260

I want to confirm bq24260 battery detection fuanction in the datasheet.

P18 8.4.6 Battery Detection

VDETECT = Vbatshort is correct?

VRCH is 120mV or Vbatreg - 120mV? (Vbatreg = 3.6V --> VRCH = 3.6V - 120mV = 3.48V?) 

Best Regards.

Higa

 

  • 0
    TI__Genius 13700 points

    Hello Higa,

    The voltage used for battery detection can be seen in the scope captures that begin on Pg. 37 of the datasheet here:

    The  numbers behind these figures can be determined from the electrical characteristics as a function of the battery regulation and recharge voltage thresholds.

    The calculation would like more like this:

    Vreg = 3.6V

    Vrch = Vreg - 120mV

    Vrch = 3.48V

    Vdetect = Vrch (OR) Vrch-200mV

    That is the voltage threshold used to detect during current sourcing. The detection voltage used during current sinking is the battery short circuit voltage of 2V typical.