I'm using CN3722 for 2 cell battery charging. I have two way supply, it gets power from Solar as well as DC 12V whichever is available. The MPPT is set at 11V. Solar panel maximum goes to 21V.
I have two circuits. When I apply 12V the 'CHRG LED' blinks(Battery - NC) in both of the circuits, When increasing voltage to (13V-15V) the CHRG LED stops blinking(should blink) in one of the circuits. The charge current is set to 1A.
Both circuits have similar diagram and components but show different behavior. When I increase the voltage above 13V the battery is not charging in the faulty circuit whereas in the other circuit all conditions are working fine.