Hello:
I have a question about the state of BQ2031. When I insert a battery to the charge circuit , The current of charging is 1.6 Amps in Fast charging state, The LEDs state is right and the BQ2031 is working properly . At the same time When I remove the battery. The LED2 state is ON.The LED1 and LED3 is OFF. which is the Fast charging state. But the pin of MOD has not PWM wave and it has not charge current. when i insert the battery to the charge circuit again, the BQ2031 is working in Fast charging state immediately .the current of charging is 1.6 Amps.That is to say. the BQ2031 is not check the battery ,It has not Pending state and Pre-charge qualification state ,If the last state of BQ2031 is Maintenance charging . When the batery insert the charge circuit again .the BQ2031 is working in Maintenance charging state immediately .Please tell me how to solve the the problem. Thank you very much .
I have some points to list .
First : The charge circuit is correct.
Second: The chip of BQ2031 is good.
Third :The battery is good.