If the part number is "LM2576HV" than youre in with a chance yes. (p/n on the big black 5 pin chip)
If its just the LM2576 then its not got high enough voltage rating.
..Also, it needs to be the 12v part, or the adjustable part...what is the complete part number?
Its actually a bit naughty putting single power supplies in parallel……..the LM2576HV is 3A rated, so your two in parallel will be 6A total…however, we need to read the LM2576 datasheet to see at what current the overload protection kicks in (if at all)…because one of them will try and deliver more current than the other….and if it keeps tripping out on overload protection, ,then we’re stuffed.
If those pots are for adjusting the vout...then you can actually twiddle it so that they both deliver almost the same current
YOu can get some sense resistors and check what the current coming out of each one is....then twiddle till theyre almost equal
Also, another way to encourage them to share the current, is to put a 1W, 33milliohm resistor in series with the output of each Buck module....so there you go...you can also use these resistors to check the current........whilst twiddling.
(This of course is all based on me assuming that that chip is an LM2576HV...i cant see it, and just guessing)
LM2576HV