CREE Design Circuit 12Volt Power Supply Diagram

MEXICOWANDERER wrote:
Yes to all
This is the reason why the power supplies have been failing on you. As I stated earlier I only use Meanwell power supplies. DC to DC and AC to DC. They use proprietary ICs. Sort of a benevolent trick GDEtrailer but this is why I use my more expensive option. Avoid 120vac CREE devices. Single unit 120vac current drivers are flawless when double checked for current (thermal) combatibility. Did I forget to mention the discrete device above is Crees own design?

Cree didn't "design" that circuit..

That is taken directly from TIs own circuit samples, sure they may have "tweaked" the values but "designed", no..

Giving Cree a bit more credit than they deserve.

Most manufacturers instead of designing simple things from scratch they use things like that regulator and a sample diagram to build on, saves time and R$D money..

Although since for yrs Cree like any other LED manufacturer have been in the efficiency wars would use higher efficiency switching power supply regulator chips instead of the energy burning fire breathing and wheezing Linear regulators..

Don't get me wrong, I HAVE been known to break out a few Linear regulator circuits when time and money or noise are at stake..

Example, to save on RFI like my homemade 30A 13.8V power supply for Ham equipment where RFI IS a major consideration. Big heavy honking transformer, heavy duty bridge rectifier, regulator designed with 12V 1A linear regulator with several diodes in series lifting the ground on the chip and the chip is driving 4 paralleled 2N3055 in series pass regular mode.. The output in theory could handle 60A but the transformer is only good for 30A.. Cjeap, effective, Built proof and stone dead quiet in the RFI department but at a cost of generating a bunch of wasted heat in idle mode..