Quad Leds?

[wesinator]

Ok so there are some quad leds out there,but they aren't made of the best components. What i want to know is if there are some better mult die leds made of perhaps R2s or Q5s. Also is there anything more than a quad, like a sextet or an octet led?

 

[Superdave]

the only 2 major quad die LED's are the SSC P7 and the Cree MC-E.. both are excellent.

There is a 6 die, i've only seen 1 or 2 of them put into flashlights..

 

[Gryloc]

You mean multiple LED emitters (multiple reflectors) or multiple die chips in a single package (single reflector)? You can have multiple single die emitters (with separate reflectors) using premium Q5 and R2 Cree XR-E emitters, and there are lights using the Cree MC-E and Seoul P7 (quad-die), but they do not come in Q5 and R2 bins (they use their own binning structure). There are better lights out there in both configurations. Unfortunately, with LED flashlights in general, nice quality construction and components usually come with a cost.

If you are thinking of 3, 4, or 7 emitters and reflectors, look at some of the modified Maglites around the forums. DX sells tri-emitter lights, but they can be cheaply made. You could mod these tri-emitter lights with R2 emitters, just ask how on the forums.

As for the MC-E and P7 emitters, there are also Maglites modified to use these emitters behind the big reflector. DX sells flashlights using these emitters, but I am unsure about the quality of these lights, either. There are some custom Mag mods with the Osram Ostar (four or six die) as well. Finally, if you have the cash, there are multiple quad-die emitter flashlights out there (quad P7 emitters).

Custom lights will last a lifetime, but can be pricey (unless you do the build them yourself). DX lights will work, and they can be bright, but they are seriously under-performing compared to custom lights.


-Tony

 

[Gunner12]

Do you mean 4 separate LEDs or a single LED with 4 dies?

If it's the latter, then the two more commonly discussed here are the Cree MC-E and Seoul P7, neither of which are low quality(they are used in lights from $40 to over $400). The lights themselves can be of iffy quality.

The Cree and Seoul both use the same LED die but different phosphors.

Since the LEDs are first made then sorted, if by luck 4 R2 performance level dies appear in the same LED, then it should be one of the higher binned LEDs.

There are LED with 6 and more dies per package. Many don't seem to be as efficient though.

 

[monkeyboy]

I would estimate from the data sheets that the top bins of Cree MC-E and SSC probably do consist of high bin Cree dice. They may well be Q5/R2 rated. The problem is that with 4 dice that close together, they run hotter, reducing the efficiency and limiting the max drive current to 700mA per die as opposed to 1000mA.

Osram make the 6-chip Ostar but the efficiency is not quite as good as the P7 / MC-E. The top bin "QZ" comes close though and beats them in overall output. Unfortunately QZ are pretty hard to come by; I've only seen a few on CPF.

Edison Opto make LED's consisting of large arrays of dice. Again the efficiency is a little below the Cree and Seoul offerings. Also, such large arrays are hard to collimate and are therefore only suited to flood applications.