oregon-mike
Registered User
Yaric08,
You may want to check out that site again. The way I have read it is that those power pucks will run the LEDs in parallel as well as series. I've been looking at the Luxeon K2s for exterior & interior lighting in the horse trailer. I'm going to order a few of them and see how well the puck does for powering as well as see how bright the lights really are (do I *really* need 12 of those things on the outside & inside to be able to see at night?).
Here's the page with the power puck I'm looking at (they don't offer a 1.5A one for max brightness on the K2 yet):
http://www.luxeonstar.com/item.php?id=863&link_str=240::241&partno=3021DE1000
There's a link on that page with the data sheet. Here's the portion I'm talking about:
Figures 3 through 6 show 700mA and 1000mA rated units driving multiple LEDs. Note that parallel strings of LEDs can
be driven directly with no additional circuitry required to insure current sharing. The nature of the LEDs themselves
will provide good current sharing if the parallel strings comprise 3 or more junctions each.
Now I, so far, have yet to find on that page exactly how *many* strings in parallel that puck will run, but I'm hoping for 4 of them. Those K2s drop 3.85 V per LED. I'm going to try to run 4 parallel strings of 3 K2s in series for the lighting I want to accomplish on the outside/inside. First order of business is getting half that amount and seeing if the puck will drive 2 strings and see how much light I actually realize. I'll be using the spot mounts and the lenses as well. They only claim 85% of the light out of the lenses, and I'm already only getting 66% of the light based on the current I'll be feeding it (1A vs 1.5A).
I'll start a post later if anybody's interested in the results.
Mike
You may want to check out that site again. The way I have read it is that those power pucks will run the LEDs in parallel as well as series. I've been looking at the Luxeon K2s for exterior & interior lighting in the horse trailer. I'm going to order a few of them and see how well the puck does for powering as well as see how bright the lights really are (do I *really* need 12 of those things on the outside & inside to be able to see at night?).
Here's the page with the power puck I'm looking at (they don't offer a 1.5A one for max brightness on the K2 yet):
http://www.luxeonstar.com/item.php?id=863&link_str=240::241&partno=3021DE1000
There's a link on that page with the data sheet. Here's the portion I'm talking about:
Figures 3 through 6 show 700mA and 1000mA rated units driving multiple LEDs. Note that parallel strings of LEDs can
be driven directly with no additional circuitry required to insure current sharing. The nature of the LEDs themselves
will provide good current sharing if the parallel strings comprise 3 or more junctions each.
Now I, so far, have yet to find on that page exactly how *many* strings in parallel that puck will run, but I'm hoping for 4 of them. Those K2s drop 3.85 V per LED. I'm going to try to run 4 parallel strings of 3 K2s in series for the lighting I want to accomplish on the outside/inside. First order of business is getting half that amount and seeing if the puck will drive 2 strings and see how much light I actually realize. I'll be using the spot mounts and the lenses as well. They only claim 85% of the light out of the lenses, and I'm already only getting 66% of the light based on the current I'll be feeding it (1A vs 1.5A).
I'll start a post later if anybody's interested in the results.
Mike