luxeon 3's BIN'd for 3.9-4.23 Volts?

elfen1

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luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

Anyone have these or seen them arounf or know where to get them?
 
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LITEmania

Guest
Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

Vf M : 3.99-4.23 is very rare.
I hv some L Vf : 3.75-3.99
SY0L

Warren
 
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LITEmania

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Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

oops! Fred is selling here tw0m
 

elfen1

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Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

I have an emitter thats pulling 3.9 when I measured it on each tab beside the dome. I'm not sure if they can go up to any voltage or if the Vf basically limits the amount>?
 
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LITEmania

Guest
Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

L Bin shows 700mA at 3.9V and 1000mA at 4.1V

I don't think this is an issue for the flashlight unless you run it 2 or 3hours continuous other than batteries.

But fare well heat sink is essential..
 

3rd_shift

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Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

[ QUOTE ]
elfen1 said:
Anyone have these or seen them arounf or know where to get them?

[/ QUOTE ]

What will you be using these for anyways?
Just curious. /ubbthreads/images/graemlins/wink.gif
 

elfen1

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Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

4 a 4 star mag conversion using 4Dcells 9000Mah each.Sorry about the type I have a newborn Z& onlty 1 hand avail!!!
 

wasBlinded

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Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

Don't forget that even if you have an LED that starts out with a high Vf, the Vf will drop with use over time, with the biggest drop coming in the first 24 hours of burn time. So if you make a direct drive light with one of these, you should periodically retest the current draw to make sure it is not pulling more current than you expected.

The drop in Vf with high Vf LEDs is much more dramatic than with low Vf LEDs.
 

Ny0ng1

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Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

wasBlinded: any example of the margin of the drop for L or K Vf?
for e.g. 3.9V to ?.??V after 24hours?

TIA
 

wasBlinded

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Re: luxeon 3\'s BIN\'d for 3.9-4.23 Volts?

The amount of drop varied between samples. Typical was a 0.15 volt drop, but some eventually dropped as much as 0.3 volts. This can result in big current increases in direct drive situations. You can see the thread yourself here: Vf shift
 
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