Iam Dineshkumar, I'm using LTC4162-L42 IC for charging 3 cell (11.1V) and 4 cell(16.8V) lion batteries, its perfectly working for 4 cell(16.8V battery) with 20V input voltage, but its not working for 3 cell(11.1V battery) combination with the same input voltage (20V).

Kindly reply for me to solve this issue.

And also i selected the cell combination 3 & 4 in cell So & cell S1 pins in my circuit.
[edited by: at 5:16 AM (GMT -5) on 10 Nov 2021]