Is it possible to test that the MCU output which modulates the FETs ‘gates is working ? (I assume this is how it should work?
Maybe the problem is there.
I was surprised the C4 voltage was higher that the cell – maybe because of differing track resistances?
Does the fact I can control the charging current with the VR confirm that part of the circuit is working? ie the neg feedback section.
I am using LT1677s