Hello,
I need to generate +-15 V DC from a single 3.6 V LiSOCl2 primary cell to power a couple of measurement op-amps and came up with a schematic diagram like this:
I simulated it using LTspice XVII and it seems to perform quite well, but one thing got my attention. LTSpice shows that there is some reverse current flowing back to the battery (plot I(V1)), which obviously is not a safe situation when dealing with a primary, non-rechargable lithium battery. Is it something to be worried about or is it just some kind of a simulation error?
I put a Schottky in series and of course it helped for the reverse current, but I guess it's not an acceptable solution as whole thing should be as energy efficient as possible.
EDIT: I just added some series resistance (~50 mOhm) to the voltage source modelling the battery and the reverse current almost disappeared. So I guess the first simulation was wrong? I'd be grateful for any comments on that. Thanks!
