My question is; to power 4X LEDs 3.3V@350mA, which driver should I use.
If you want to power Four 3.3v 350mA LEDs, you will need about 1.4 amps (350 x 4 = 1,400) at 3.3v, or you could run them in series at 13.4v at 350mA. Either way should work, but parallel is probably the better way to do.
I was leaning towards the 15P, thanks for the confirmation.Any insight into what the "Voltage Adjustment Range" spec on the datasheet means? It's in the same table as the "LED Operation Voltage"