Future development of the maximum luminance of LEDs

Does anybody have anything on the Boost HX recently?

Any one going to add the info on the SST20?

The_Driver, could you please add Lumileds Luxeon CZ to the table?
It seems to have the lowest thermal resistance of any 1 mm² LEDs that I’ve seen. Though I’m not sure if they mean real or electrical resistance, the datasheet is unclear about that. If that’s electrical - it’s still very good but no longer special.

Though then there’s a tiny thermal pad which will spoil performance for sure. If indium solder really brings actual improvements, these are going to be relatively high with this LED.

ADDED: This Luxeon C document (not CZ) makes me believe they mean electrical resistance. I’m not really surprised….still, resistance is good and I think this LED should easily get intense enough to deserve a its place in the table on the first page.

I have added it, maybe you can help me fill some of the data fields.
I’m very sceptical regarding the maximum performance.

I don’t expect it to play in the same league as automotive LEDs really.
But:

  • very small footprint may be good for tight packing multiple LEDs
  • it goes up to CRI90 :slight_smile:

And I think it’s likely to be the throwiest LED on the market with CRI>70. :slight_smile:

Area of the heat conducting solder pad:
1.08 mm²
max. rated LED temperature Tj:
135°C

Other fields need testing. :frowning:

Luminus SST-20 CRI95 seems to be over 100 cd/mm² though the precision of my calculations is too low to call it definitive:

CRI70 variant is over 100 for sure. I’m sure I’ve see it tested somewhere but can’t find it now….

.

Boost HX or colored flat?

Looks like 1 mm²!!??
Haven’t heard about it before but CULNM1.TG is a thing:
https://www.arrow.com/en/products/kw-culnm1.tg-z8pf5-ebvffcbb46-65g5/osram-opto-semiconductors
ADDED:
And Osram is phasing it out:
https://www.mouser.com/PCN/Osram_Opto_Semiconductor_1_cip_OS_NFND_2018_008.pdf
:smiley:

4040-size and 1mm2 die, hmmm :neutral_face:

Throw the bone to the dogs L4P :smiling_imp:

It looks like 2mm2 led to me… But lets wait and see what will L4P say.

1 mm², CULNM1.TG aka Boost HL. And it’s already tested:

Than it seems we spammed The Drivers thread :innocent:

I already added it and linked to the test.

I’m guessing this is nothing too interesting:

https://www.samsung.com/led/automotive/automotive-leds/i-series/3w-white/

I’m not too adept at reading datasheets to determine such things though.

I’m not that great at Datasheets either. But it seems to have package size just a bit bigger than XP, and die size about the same as OSRAM White Flat. It is rated for 385lm from 3.0V and 1.0A current. I’d like to see djozz test it! :partying_face:

After quick look it looked like a winner.
But looking closer: it’s rated for mere 1.5A which seemed suspicious (White Flat is 3A).
Output scales nicely with current but Vf grows fast. So efficiency drops quickly.

I don’t expect it to challenge Osrams but I’d like to see it tested as well.

According to manufacturer, Getian GT-FC500X3-3.0 does 100-120 cd/mm². :slight_smile:

Can someone share some ways to measure or calculate [cd/mm2]?

I know how to measure cd and know my area size.
I have lumen tube, lux meter, laser power meter, and other equipment.

I never got around to actually calculating this value but now it is quite important to know because I am building LEP

Regards Xandre