One of my pet projects requires a power supply that gives both +48 VDC and -48VDC (from mains), no more than 3A on each rail. After a bit of a look, it seems that such power supplies are rather rare, especially here in Australia. Maybe I'm using the wrong search terms, but I can't even find a
*single* supply that puts out both +48V and -48V. However simple +48V supplies are relatively easy to get hold of. So, my idea was to tack a DC-DC inverter onto the output of the +48V supply to get the -48V.
Now, this is an area I'm not too familiar with. I've made simple capacitor-switching charge pumps before, but for ten's of mA, not 3 A. And I've never done a proper switchmode supply. My question is - for this situation, which will be easier to get working: a charge pump or a switchmode inverter? Strict regulation is not an issue - the 48V actually goes into another DC-DC converter (don't ask ...) which will hopefully fix any slight discrepancies in the -48V output.
Or, if someone has a link to a +/-48V power supply that you can buy in Oz, let me know!