series input parallel output SMPS

bitrex · 2018-03-29T13:20:28+00:00

I have a bunch of small 12 volt input ATX SMPS power modules each rated for 120 watts. about 14 bux each, surplus. Fanless 200 watt modules are harder to come by and significantly more expensive. I'd like to slave two together to get ~200 watts out, with the inputs in series. 24 volt 8 amp power bricks are pretty common. I found this whitepaper on voltage balancing SMPS inputs in series but it seems more applicable to from-scratch designs. Got any suggestions?