NEWS: New Red diode from Osram

K

KitnerPush

Active Member
So, Osram recently released a new 3737 Red diode which is 11% more efficient than previous generation.

Another thing worth mentioning is that the peak wavelengths are shifted from 646nm-666nm from previous generation to 665nm-680nm. So more towards the 700nm mark.

I'm not sure the difference justifies the cost for home growers, but with increasing energy costs it may be worth noting when making decisions in the future.

Personally I would like to see more red light coming from red diodes over full spectrum white ones.

OSCONIQ P 3737 high-power LED - ams-osram - ams

ams-osram.com ams-osram.com
 
J

Jonesfamily7715

Well-Known Member
I've been looking at this too. I would already be running these if it wasn't for the odd ball 3737 footprint. I cannot find mcpcb in this size, not that I've looked that hard yet. But the price on these aren't bad if you buy 200 they're like a dollar each right? They have a couple horticulture whites in this line as well as a 630 nm and far red. I would like to do a build with all of these. Cree has an updated xpg3 photo red with similar efficiency, only they are unreal expensive like $3.50 each.
 
F

Frankindank

Member
Footprint and solder pads are not the same thing. You are asking for the wrong thing.
Check the solder pads measurements of XPG3 3535 and the Osram osconiq 3737 ;)
There is a reason Osram made this package and didn't just put the bigger epi into the oslon square package.
 
J

Jonesfamily7715

Well-Known Member
Frankindank said:
Footprint and solder pads are not the same thing. You are asking for the wrong thing.
Check the solder pads measurements of XPG3 3535 and the Osram osconiq 3737 ;)
There is a reason Osram made this package and didn't just put the bigger epi into the oslon square package.
Click to expand...

So can I use a 3535 mcpcb for these diodes, or do I have to buy separate boards?
 
J

Jonesfamily7715

Well-Known Member
You got me down a rabbit hole, lol. I haven't dug into this very deep yet anyways here's the deminsions, sorry if my terminology isn't proper, I'm a cnc machinist so bare with me. First 2 are cree 3535 and then osram 3737
Screenshot_20240925-181726.png
Screenshot_20240925-181711.png

Screenshot_20240925-181342.pngScreenshot_20240925-182629.png
 
J

Jonesfamily7715

Well-Known Member
Id say close but no cigar. I wouldn't try it anyways. Osram has a bigger thermal pad by . 5mm , I didn't know this till just now. Wonder how much that will help the thermal performance of this chip
 
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tstick

tstick

Well-Known Member
Tell me if I'm wrong, but don't manufacturers include red diodes to boost their umole ratings? I seem to remember that MIGRO was saying that. My understanding is that white diodes already have those red frequencies in the spectrum, anyway.
 
K

KitnerPush

Active Member
tstick said:
Tell me if I'm wrong, but don't manufacturers include red diodes to boost their umole ratings? I seem to remember that MIGRO was saying that. My understanding is that white diodes already have those red frequencies in the spectrum, anyway.
Click to expand...
Well yeah, that's true to an extent, and you can get quite high red from 3000k diodes, but the more phosphorous you put in them, the less efficient they become. The added 660nm red also peaks higher than the red in whites quite considerably.
 
K

KitnerPush

Active Member
Rocket Soul said:
Has anyone found details on the 640nm version of this diode? Cant seem to find any datasheet on it, only the other versions
Click to expand...
Not sure why they have 2 far reds GF 1 and 2? I don't think the 640 is released yet. The 3737 were advertised many months ago, but they were not available until recently. The white one is pretty impressive too at almost 10x PPF a lm301 from Sammy.
 
K

KitnerPush

Active Member
Jonesfamily7715 said:
I've been looking at this too. I would already be running these if it wasn't for the odd ball 3737 footprint. I cannot find mcpcb in this size, not that I've looked that hard yet. But the price on these aren't bad if you buy 200 they're like a dollar each right? They have a couple horticulture whites in this line as well as a 630 nm and far red. I would like to do a build with all of these. Cree has an updated xpg3 photo red with similar efficiency, only they are unreal expensive like $3.50 each.
Click to expand...
Yeah, Osram is quite good on price for what you get. Always have been.
 
K

KitnerPush

Active Member
Jonesfamily7715 said:
So can I use a 3535 mcpcb for these diodes, or do I have to b
Frankindank said:
Footprint and solder pads are not the same thing. You are asking for the wrong thing.
Check the solder pads measurements of XPG3 3535 and the Osram osconiq 3737 ;)
There is a reason Osram made this package and didn't just put the bigger epi into the oslon square package.
Click to expand...
I haven't checked the datasheets for both, are you saying the 3737 has a 3535 solder pad?
Click to expand...
 
J

Jonesfamily7715

Well-Known Member
Nope definitely not, the solder pads aee different if you look at the specs the thermal pad In the middle is .5 mm bigger on the 3737, while the +&- are smaller. It looks like you might be able to make it work, but I doubt it I wouldn't try it.
 
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