C.O.B.S.S.L. News and Articles

FranJan

Well-Known Member
COBS News + Info
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Building on the success of the groundbreaking XLamp® MH family of LEDs, Cree introduces the XLamp MHD-E and MHD-G LEDs, the high-power LEDs that combine the high lumen density and reliability of a ceramic chip-on-board LED with the design and manufacturing advantages of a surface-mount package. Utilizing elements of the Cree SC5 Technology™ Platform, the ceramic XLamp MHD LEDs simplify development, increase design flexibility and improve manufacturing efficiency compared to mid-power LEDs. The MH family enables new designs and significantly lower system costs, all while delivering industry-leading performance.


A chart comparing Cree XLamp MH LEDs with other types of LEDs
“The high lumen output and high reliability of Cree’s new MHD-G LED allows us to develop a new downlight that outperforms other downlights in the market,” said Baly Luo, general manager, Aeon Lighting Technology. “ALT’s compact-size, 4-inch downlight that is built with the MHD-G LED generates over 1,800 lumens at 3000 K while other downlights can only produce 800 to 1000 lumens.”

Featuring Cree EasyWhite® technology in a 7-mm x 7-mm package, XLamp MH LEDs enable a smaller board size, tighter beam angle and a more traditional appearance than mid-power LEDs. Delivering more than 1800 lumens at 14 W and 2500 lumens at 19 W respectively, the XLamp MHD-E and MHD-G LEDs are ideal for semi-directional, high-lumen applications such as downlights, high-bay and outdoor area applications.

“At Cree, we continue to deliver innovative products that give our customers a competitive edge in the marketplace,” said Paul Thieken, Cree director of marketing, LED Components. “With the MHD LEDs, we’re offering chip-on-board performance to lighting manufacturers that prefer surface-mount technology, making it easier for them to achieve lower system cost than with the same commoditized mid-power LEDs that everyone is using.”

Cree XLamp MHD-E and MHD-G LEDs are available in 2700 K – 6500 K with high-CRI and multiple voltage options. Product samples are available now, and production quantities are available with standard lead times.


Please visit www.cree.com/xlamp/mh to learn more.
 

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salmonetin

Well-Known Member
...i use an image with mini qr code of cob led posted by sds... and used with ZXing Decoder Online...

http://zxing.org/w/decode.jspx

2dbc2.JPG ...to... 2dbc2+.JPG

...an decoded ok... ...same number of sds... 30E10K0LX24eK1T201141416

...thanks sds...;)

pd...maybe you can capture with your webcam (or other cam) one image of mini qr code of your cob led... ...and with the image captured you can use the qr code reader online...mine two cents...;)

saludos
 

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stardustsailor

Well-Known Member
That's awesome stuff SDS :clap:! So they do measure the output of whites in mW, or is that just the output of the blue die? FUCK fuck fuck we could really use that kind of output info :wall::wall::wall:.
As a blue die ,output is given in mW.
As a white led ,output is given in lumens .

Not sure ,but I think that older Vero series ( 1 & 1.2 ) utilise the BXCD4545 dies.
old dsies.JPG
chip 3.JPG

While the new GaN-on-Si die ..( BXGS45 )...
chip 1.JPG

for sure it shows a ..weird feature ....
chip 2.JPG
Now..What a "power degradation " !!!!

At 32,700 hours of operation @450 mA with Tj=140°C ( ! )
and Ta= 80 ° C ( ! ) ...

Well ,the "power degradation ",seems to be somewhere between ...
0% and ...+5% .!!!! .

What kind of power "degradation" is that ?
At 32,700 hours ? and withTj =140 °C ?

That led die /chip is practically ...immortal ....

If half of that are true ,then...
I'm really amazed ,the least ,I should say ,by the new VERO line...
The best LED COB series ever made (up to now ) from every aspect ..
Efficiency,ease of installment ,cooling/thermal characteristics,service life ,price,availability ,
etc...

Cheers.
:peace:
 
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salmonetin

Well-Known Member
...BXGS45 is the name of the new dies... but the name of product family its the same BXRC...
...then...how to distinguish the new from the old... ...by photo of the die?...;)

pd... okok i saw...
...BXRC-27x10K0 ...30x10K0 ...35x10K0 ...40x10K0 ...50x10K0...on vero 29...
...BXRC-27x4000 ...30x4000 ...35x4000 ...40x4000 ...50x4000...on vero 18...
...BXRC-27x2000 ...30x2000 ...35x2000 ...40x2000 ...50x2000...on vero 13...
...maybe x = new cri....;) ...or maybe 10k0 for vero 29... 4000 for vero 18... 2000 for vero 13...;)

Pd...SDS i saw one thing... http://www.bridgelux.com/wp-content/uploads/2013/10/DS33-Bridgelux-Vero-29-Data-Sheet-with-increased-efficacy.pdf
...Table 4: Electrical Characteristics... on page 8... ...TTRJ to Case...;):fire:...

Pd1...What kind of power "degradation" is that ?... At 32,700 hours ? and withTj =140 °C ?...

...stress test... ...on 450mA... ...tj=140ºC ...ta=80ºC...
..."normal" test... ...on 350mA... ...(ta= i guess 25ºC)...32.700 hours...

...maybe im wrong... off course...;)

Pd2...i saw your answer...thanks for aclaration sds... :hug:;) ...time to back to my cavern... wilsoonn... fire to the join... (sorry no cannabis):wall: ...okok then an infusion ;)... :lol::lol::lol:

saludos
 
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stardustsailor

Well-Known Member
...BXGS45 is the name of the new dies... but the name of product family its the same BXRC...
...then...how to distinguish the new from the old... ...by photo of the die?...;)

pd... okok i saw...
...BXRC-27x10K0 ...30x10K0 ...35x10K0 ...40x10K0 ...50x10K0...on vero 29...
...BXRC-27x4000 ...30x4000 ...35x4000 ...40x4000 ...50x4000...on vero 18...
...BXRC-27x2000 ...30x2000 ...35x2000 ...40x2000 ...50x2000...on vero 13...
...maybe x = new cri....;) ...or maybe 10k0 for vero 29... 4000 for vero 18... 2000 for vero 13...;)

Pd...SDS i saw one thing... http://www.bridgelux.com/wp-content/uploads/2013/10/DS33-Bridgelux-Vero-29-Data-Sheet-with-increased-efficacy.pdf
...Table 4: Electrical Characteristics... on page 8... ...TTRJ to Case...;):fire:...

Pd1...What kind of power "degradation" is that ?... At 32,700 hours ? and withTj =140 °C ?...

...stress test... ...on 450mA... ...tj=140ºC ...ta=80ºC...
..."normal" test... ...on 350mA... ...(ta= i guess 25ºC)...32.700 hours...

...maybe im wrong... off course...;)

saludos
.stress test... ...on 450mA... ...tj=140ºC ...ta=80ºC...
Reference of " 100% output power" ,is the same die "flashed" with specific time intervals @350mA.
Then ther chip is driven @450mA and Ta=80 /Tc=140 for a certain period of time.
Any degradation measured ,is compared as a percentage to the reference of " 100% output power".
 

Greengenes707

Well-Known Member
FINALLY!!! Basically everything is available in a next bin up vs the 1st generation. AD 3K's!!! and AB 2700k's.
The new bin for the 3590 3K (CB), is now on there too...so maybe those CB's that have been gotten so far were early releases. Seems like cree simply got better at producing all cxa's.
I'm very excited to grab some 3070's3K AD's when they drop now that they will be up to par with the 3590's CB.
 

Positivity

Well-Known Member
FINALLY!!! Basically everything is available in a next bin up vs the 1st generation. AD 3K's!!! and AB 2700k's.
The new bin for the 3590 3K (CB), is now on there too...so maybe those CB's that have been gotten so far were early releases. Seems like cree simply got better at producing all cxa's.
I'm very excited to grab some 3070's3K AD's when they drop now that they will be up to par with the 3590's CB.
Thats just bad@ss
 
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