My customer use LTC6803-4 and I attached around circuit diagram of LTC6803-4.
They say that their system is consisted of connecting 1 ~5 ea LTC6803-4s.
During use this circuit, they got some issue like below.
If they use their system connecting over 2 LTC6803-4s, they say that vantage value of lowest battery is lower 0.1V ~0.2V than other batteries.
And this voltage Gap is increasing as time passes.
2-1) Would your check attached their schematic (Schematic-1.pdf, Schematic-2.pdf) and let me know your opinions?
2-2) Would you advise how to handle V+ pin?
They guess that the root cause of above issue is a handing method of V+ pin.
2-3) Would you advise how to handle TOS pins ?
In your datasheet, it seems that TOS pin of LTC6803-4 connecting highest battery should be connected to VCC, and other TOS pins should be connected to GND.
2-3-1) Is above thing right?
In attached schematic, TOS pins are NC.
So they want to know the effect if TOS pin is NC.
2-3-2) Would you suggest your opinions about the effect if TOS pin is NC?
Please help them.