SLUSDC7A March 2020 – November 2020 BQ25306
Battery charge voltage is set by a resister divider. The battery charge voltage is programmed as VREG = 1.1(1+R1/R2). R1 is a high side resistor from BAT to FB pin and R2 is a low side resister from FB to FB_GND. The recommended resistance of R2 is 200 kΩ or lower. 1% or higher accuracy of resistors is needed for R1 and R2 resisitors. For a 1-cell 4.2-V battery, R1 = 562 kΩ and R2 = 200 kΩ are recommended; For a 2-cell 8.4-V battery, R1 = 1.33MΩ and R2 = 200 kΩ are recommded.