ds2712
Hi, I've tried to build this same charger, with parallel configuration too with some results.
That schematic you posted does not have that CSout pin connected that is a pin that is used to control the amount of current from the power source.
So I gave up on DS2711 and instead of that one I've built the circuit based on Figure 5 but that is for DS2712 only
I ordered also a DS2712 sample so thats why I was able to do that.
But now I think that even if that CSOUT pin is left floating the circuit will also work, as it only an output and the IC does not care if it's connected or not and thus not influencing the internal state machine.
Also, on the circuit with DS2712 I've been able to charge only 2 kinds of rechargable batteries, Sanyo with NIMH with 2100mAh and Panasonic NIMH with 2100mAh.
Tried with less known brands like one Noru with 2400mAh and GP with 2100mAh and fault would occur after a bit
That could be because I've built the current sensing resistor RSNS by paralling serveral low resistance resistors, and the accuracy of the charging can be diminished this way I think.
Also the FCX718 I exchanged with a equivalent 2SB985 and don't know till which extent they are compatible on the circuit in hand.
Also the source I'm using is from a computer power supply, to give more current to the batteries, in theory, as I dont know how much current is drained from the source.
Hope it helps