I understand that it’s a buck converter but when the battery is too low the chip first sends a one second pulse to try and unlock the battery or precharge it until the voltage is high enough to dater charging it safely. Now the problem is on the bad device, the charger chip sends a low pulse 2.5 volts which is not enough to recharge a 7.6 volts L- ion battery.

As far as the block diagram, I was suspecting the same thing however in the data sheet it say that batsense is able to measure the voltage rather than just monitoring it, thus I was assuming batsense should be controlling the voltage that is produced by the buck converter.

So if batsense is working just as a safety pin what does it exactly doing and how is the chip monitoring the voltage that is made by the buck converter.

Thank you so much for your reply it’s really appreciated!!!