XM-L2 voltage

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akv
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XM-L2 voltage

hi
if i’m connecting lithium battery directly to XM-L2, will it turn on? even when the battery is fully charged?
what is the voltage range?
thanks

will34
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Take a look here: http://budgetlightforum.com/node/20120

The XM-L2 needs much lower voltage than a fully charged cell to power on, if you connect them directly you will end up driving the LED to very high current and possibly blow it up if not heatsinked correctly.

akv
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will34 wrote:
Take a look here: http://budgetlightforum.com/node/20120

The XM-L2 needs much lower voltage than a fully charged cell to power on, if you connect them directly you will end up driving the LED to very high current and possibly blow it up if not heatsinked correctly.


thank you
is there any drivers that i can use them with 0-1 switches?
what i want to do, is to connect few switches / few drivers in parallel, so every switch addes more current. and i also want to get the max lumens possible from the leds.
will34
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akv wrote:
what i want to do, is to connect few switches / few drivers in parallel, so every switch addes more current. and i also want to get the max lumens possible from the leds.

Why don’t just use a multimode driver for that? http://flashlightwiki.com/Driver

akv
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you right, i will. Thank you

will34
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For maximum output I suggest you use a FET driver, and of course the LED mounted on a DTP copper mcpcb.

MRsDNF
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Later XML2 leds had a higher voltage requirement that would not handle high currents. Around 5 amps is close to the point of no return. I tested an XML2 U4 the other day and it blew at 5.25 amps, much the same as the XML2 U2’s I was having problems with. The voltages I dont recall. Its well documented here in a couple of threads.

 

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akv
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will34 wrote:
For maximum output I suggest you use a FET driver, and of course the LED mounted on a DTP copper mcpcb.

hi, what’s better, the aliminium mcpcb or the star sinkpad?
i’m not from US
ImA4Wheelr
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^
Hi akv. Copper conducts heat about two times better than aluminum. So for high current situations, a copper direct thermal path (DTP) MCPCB is far superior.

Based on your plans, questions, and responses, I’d bet you’re going to make an impressive light cannon. Best wishes. Smile

akv
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ImA4Wheelr wrote:
^
Hi akv. Copper conducts heat about two times better than aluminum. So for high current situations, a copper direct thermal path (DTP) MCPCB is far superior.

Based on your plans, questions, and responses, I’d bet you’re going to make an impressive light cannon. Best wishes. Smile

Wink yes i’m hoping to make this. my planes is to use a computer/cpu heatsink cooler with a fan, so i think the regular/non-copper will do enough good anyway. i planning to use 10×17mm 8*7135 1-mode drivers, 28A in total. best wishes Smile
akv
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MRsDNF wrote:
Later XML2 leds had a higher voltage requirement that would not handle high currents. Around 5 amps is close to the point of no return. I tested an XML2 U4 the other day and it blew at 5.25 amps, much the same as the XML2 U2’s I was having problems with. The voltages I dont recall. Its well documented here in a couple of threads.

ok i got it, thank you