Greetings. I need a power supply to test LEDs. It'll need 120vac input, constant current or constant voltage outputs, in the 0-12vdc and 0-3 amp range.

I have an MPJA HY1500 series supply, but was told that, on occasion, it can cook an LED at first connection. I suppose this is because it doesn't have OCP or OVP (does it?).

I don't know much about these things. Anyone have any confirmation of the hazard, or other advice? Thanx!