Hi
Hi,
I am using BQ24020 charger IC to charge 120mAh Li-ion battery. I set the charge current to around 100mA. Attached is the circuit schematic. The problem I am facing is STAT1 and STAT2 signals indicate that battery is fully charged even though battery charge in progress and charging with desired current. I have put voltage divider circuit for status signals because the processor works at 2.8V. Please suggest a solution.
Note: R23 is DNM
By considering battery status monitoring feature, I am planning to select different IC that provides interrupt signal on certain battery level (typically 3.3V) to indicate low battery. Otherwise I need to poll a signal to monitor the battery level continuously, such activity doesn't allow processor to sleep draining battery. Please suggest a part which has compact package and takes care of this feature.
Also I have requirement of backlight driver for TFT LCD. Backlight contains dual LED (but with common cathods and anode) and requires 30mA at 3.3V to operate at full intensity. I want control the intensity by using PWM signal coming from processor. The input to the driver is 2.8V. The efficiency of the driver should be more than 85% and the part should be compact. Please suggest a part.
Basavaraj