I’m not really into IR leds but as part of a Mouser order in a wave I bought a new Luxeon IR led (https://www.lumileds.com/infrared-emitters/luxeon-ir-domed-line), partnr. L1I0-0850090000000 , do you know they are any good compared to the Oslon IR leds?
(for oslon black flat : ) So… A suitable driver would be good if it used a pfet instead of nfet that we use now . Basically to regulate the positive instead of the negative .
I hope a member like DEL would give us some info 
PFET works, but AMCs don’t
I did have the IR LEDs checked in datasheet and physically here, did not check black flats to be different, no idea why they are not doing it at least on all the same
At least with normal driver and the black flats worst thing happen is DD if star insulation fails
It should be possible to insulate the star with a thin insulator sheet of aluminum oxide
I would be interested in designing a pfet only driver , but i don’t have the time to make any reasearch right now .
Can you explain it please ?
If you electrically insulate the star from the body you do not have to worry about the non-neutral cental pad and you can use any normal driver.
I already know that , but i don’t know the proper way to do it …
I remember someone tested it with Arctic Alumina adhesive but output dropped dramatically after some time .
Edit : Ohh , nevermind , it was you Jos : What did you mod today? - #3363 by djozz
With a 20mm star of even a big 26mm Maxtoch board, and flat surfaces to begin with (that Secruritying led-shelf was rubbish) the layer of AA will be thinner and have a larger surface area, the method could work much better then.
Thanks !
Hi :nerd_face:
Why wouldn’t an Osram Black Flat work on a Regular AMC7135 Driver? , because from the Datasheet the Center pad is Connected with the Negative Terminal of the LED ?
EDIT:
The answer is because AMC7135 Chips Regulate using the Negative Terminal :student:
That is an interesting led, Can’t wait for the Tests :partying_face:
Vinh shared a picture of his Oslon driver:
http://www.candlepowerforums.com/vb/showthread.php?440679-NEW-WORLD-ORDER-4-THROW-V54-World-that-is-HaHa\*&p=5163093&viewfull=1#post5163093
Cool, he must have done the regulation at the positive side then. I hope that Richard is selling this driver soon (still a pain that his business is in the US, some country with one of the poorest postal services combined with the most expensive international shipping in the world).
Another solution for the use of Oslon leds is the new 20mm non-DTP (but with DTP-level thermal performance) board that led4power is going to sell soon.
I could design real quick a Nanjg 105 compatible p-fet driver, no magic there arenplenty good p-fets, just moonlight will be not as low as with fet+1 drivers
What is a Good P-FET Alternative to LFPAK56 or LFPAK33 ?
Vinh is SkyLumen Right ? :innocent:
Right
Ill have a look on datasheets of different candidates later today
Good Luck :+1: :+1: :+1: :+1:
I would choose this solution… I don’t wont any drivers except mine 
But hey! 20mm? led4power please bring us 16mm versions also.