I've got something that crushes all the other COBs and other lights

CobKits

Well-Known Member
for example most people who are starving for ultra efficiency ask me what to recommend, and i recommend the 1212s and lots of them.

the least efficient cob in my arsenal... but at that price, stack em up and run em low current and dollar for dollar its as good as anything out there

a lot of it is thermal dissipation. you have to assume that the same dies are used across the board in all products in a given gen

so the same dies in a 1212 as an 1825, 1212 has 144, 1825 has 450
3 1212s have 432 dies (more or less the same as an 1825)

1212 is a 28mm cob = 784 sq mm of dissipation
1825 is a 38mm cob = 1444 sq mm of dissipation
(3) 1212 has 2352 mm of dissipation (63% more than a single 1825, apart from being able to be spread apart to cooler areas of the heatsink

by this reasoning, the least number of dies on a given package size should be favorable, for dissipation purposes. obviously there are design considerations about packing as many dies as possible on a chip

probably the reason crees do well at lower currents. relatively low die count on a relatively large package size.
 
Last edited:

REALSTYLES

Well-Known Member
I'll give you guys a hint it's a CXB3590 that no one has and I got lucky. It's killing me I really want to say which one it is lol and I assure you can't find it anywhere.
 

frica

Well-Known Member
A big ass PCB with S6 binned Cree XP-G3s

Like 304 XP-G3s each driven at 0.355W for a decent 230 lm/w.
 

CobKits

Well-Known Member
sounds about right with jerry;s history of kicking out oddball high bins. grey market FTW

hey RS, has jerry given you any updates on the 200w cobs that he was talking about in august?
 

REALSTYLES

Well-Known Member
sounds about right with jerry;s history of kicking out oddball high bins. grey market FTW

hey RS, has jerry given you any updates on the 200w cobs that he was talking about in august?
still waiting I thought when he said he had a surprise for me I thought it was the new chips lol.
 
Top