full-throttle wrote:@ rkosiorek: I know what the "ideal diodes" are http://www.ti.com/lit/an/slva139/slva139.pdf
I've used the P-ch circuit as reverse polarity protection
It won't work in this case since each pack will turn the fet on and subsequently short the two packs together
A circuit based on fets would work as long as there's logic in place to turn the highest pack on only - but that is not an "ideal diode" anymore
well "true ideal diodes" with a proper controller do not allow reverse current under any circumstances.
that TI appnote is not a full implementation of an ideal diode. it just a partial implementation that uses some features of an ideal diode in a charger. in a true ideal diode.