A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the input and output capacitors close to the IC, and use short, wide traces for the power paths.
Consult the datasheet for the specific battery chemistry you are using, and adjust the charger's voltage and current settings accordingly. You may also need to adjust the charge termination voltage and timer settings.
The BQ25100AYFPR is rated for operation from -40°C to 85°C. However, the device may not function optimally at the extremes of this range, so it's recommended to operate within a narrower range (e.g., 0°C to 70°C) for best results.
Yes, but you'll need to ensure that each battery has its own sense resistor and that the total charge current is within the device's rating. You may also need to add external circuitry to balance the charge between batteries.
Check the input voltage, output voltage, and current sense resistor values. Verify that the device is properly configured and that the battery is compatible. Use an oscilloscope to monitor the device's internal signals and identify any anomalies.
BQ25100AYFPR datasheet
by Texas Instruments
