Narrower half-illumination angle (and a little bit more height), if I remember well (i.e. probably good for throwers).
G _ _ _ _ L _ _ _
Good_Luck?
Good_Luck?
:laughing: nope
Anyone are welcome to try the quiz EXCEPT Djozz and Zak
BTW, I already mentioned different soldering pad. I suppose there’s another difference? Or maybe this one, but you worded it differently?
BTW, I already mentioned different soldering pad. I suppose there’s another difference? Or maybe this one, but you worded it differently?
No, the 119D and 119C have the same foot print. This is another obvious difference
G L A S S L E N S
I’m really hoping that this is not another typo. If this is the case then dedoming this LED would be the easiest and cleanest dedoming job with less lumen loss as usual. The idea of using multi refractive index material was introduced three years ago by a chinese scientist. He demonstrated more than 21% output using the same die. He used 5 layers silicone from the high to low to slowly reduce the RI transition to extract more photons off the die.
- Clemence
You mean the difference between 119C and 119D? I haven’t seen that comparison in the posts above (or 119C being mentioned at all).
You mean the difference between 119C and 119D? I haven’t seen that comparison in the posts above (or 119C being mentioned at all).
I thought the question was what’s new in 119D/219D over 119C/219C. But yes, 119 package is better thermally compared to 219 package on two pads board like my VR16S1. Larger thermal pad area
And probably somewhat higher current handling too
- Clemence
We’ve had a bit of confusion.
But yes, your find is very interesting.
I could be wrong. If the configuration is like this: die - glass - phosphors embedded silicone, then its a total disaster. Dedoming would remove most all of the phosphor and leave us a big royal blue LED!
- Clemence
I’m surprised that 119 without dedicated thermal pad is better than 219…
I’m surprised that 119 without dedicated thermal pad is better than 219…
You can use the webplotdigitizer to check the total surface area between 119 and 219 package. But high performance non DTP MCPCB or non isolated MCPCB must be used.
- Clemence
Another improvement in 119/219D is its thermally more stable. From –30C to 25C the output remains almost the same. Less output reduction in higher temperature too.
- Clemence
Happy surgery!
Received the engineering sample from Nichia today. I requested the 119D instead of 219D because I’m still curious and optimistic that 119 footprint will outperforms 219 on my VR16S1 board as I suspected months ago. The larger total cooling area plus larger current capability with 119 footprint should nett higher max output than the less than optimal 219 thermal pad surface. This 119D also very interesting with it’s “glass lens” as described in the data sheet. Let’s find out if this new LED has …
UPDATE 180702:
Full range CCT (2700K, 3000K, 3500K, 4000K, 5000K, 6500K) Optisolis added to the store. All 3 steps MacAdam.
The VR21P4 (Optisolis/757 series only) and VR21SP4 (E21A only) already shipped to Indonesia today.
- Clemence