SLUSDC7A March 2020 – November 2020 BQ25306
The charger current is set by the resistor value at the ICHG pin according to the equation below:
ICHG (A) = KICHG (A·Ω) / RICHG(Ω)
KICHG is a coefficient that is listed in Electrical Characteristics table and RICHG is the resistor value from ICHG pin to GND. KICHG is typically 40,000 (A·Ω) and it is slightly shifted up at lower charge current setting. The KICHG vs. ICHG typical characteresitc curve is shown in Figure 8-7.