My inductors are hot :(

[AmmoJammo]

So, I bought some of these off ebay:
www.ebay.com.au/itm/140956843580

93 cents each, how could you go wrong! 
And promptly modified them to do 12volts from the 3.3volt output, and 5volts from the 1.2volt output, with a 19volt input.

So the 12volt output has a 8.2uH inductor, and the 5volt has a 3.3uH.

I've got a 1000uf capacitor on the output of the 12volt supply, and 2200uf on the 5volt, with 1000uf on the 19volt input.

Bench tested it at about 3amps on the 5volt rail, and 2amps on the 12volt... The device I plan to use this in needs about 2amps constant on the 5volt rail, and barely 200ma at 12volt.

But it did the 3a/2a happily, regulators weren't too hot...

However, I wasn't paying much attention to the inductor(s), and now its in the device, I've discovered that these are the source of the heat....

Is this simply because the values are wrong for the current and voltage I'm needing? I drew a diagram, but it doesn't show much, its basically as per this:
http://tayvoy.com/modul-przetwornicy-kiw-3312s/kiw-3312s_sch-2/

but with some feedback resistors, and the 5.6v zener on the output removed.

And here's a high res pic, thanks to someone else
http://i058.radikal.ru/1205/8b/96acaf5a353a.jpg

Thanks!

[UncleBog]

Check the DC resistance of your inductors, then IxIxR is the power lost as heat. Consider the output current and the ripple current.

[Simon]

sounds like your over working them

[madires]

Yep, inductors also got a current rating. It's based on the wire gauge, length of wire and how it's wound. For a toroidal inductor the maximum current is about 1/4 to 1/3 of what the same wire would pass when it's a straight piece of wire.

[AmmoJammo]

I know inductors have a power rating, I was lead to believe that the original design was meant to do about 4amps per output, but wasn't sure on the input voltage

I'll measure the dc resistance later and see what I find, but I'd have to assume that the issue is what achmed said, however, what output current is the 1.8a peak ripple based on? Because the 12volt rail generally only has about 100ma load on it, increasing to 300ma occasionally (if I put a floppy disk in the drive)

Cheers! (Sorry, typing from my phone)