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eli@fijireefrock.com · #1 02-09-2011, 04:20 AM

i have done few more tests.
the 1st test burnt the royal blue.
the last test was fine with no burnt led everything seems with no problem.
the reason for the shorting led of the 1st test is because i used 3 XPG and 3 XPE all in one series.
last test witch worked well i used 6 XPG in a series and no problem.
another one i rigged 6 XPE in a series separate buckpuck with no problem too.
i am happy with the results because i am planning to place an order tomorrow for the drivers.
all in all i only managed to burn 3 XPE royal blue.

GMGQ · #2 02-09-2011, 06:22 PM

Hmm, this is puzzling... Because I'm doing a mini build where I want to use one driver to drive

4 x XP-G (3.0v)
4 x XP-E (3.4v)

The driver will output a constant 700mA.

I found this quote from a site:

Quote:

Originally Posted by http://www.kpsec.freeuk.com/components/led.htm

"If the LEDs require slightly different voltages only the lowest voltage LED will light and it may be destroyed by the larger current flowing through it."

So that's making me weary of wiring up different LEDs in series now... Should I put a resistor before the XP-E??

Or should I wire the 4 x XP-G in series, the 4 x XP-E in series, then wiring the two strings in parallel?

Milad?

Quote:

Originally Posted by elias

i have done few more tests.
the 1st test burnt the royal blue.
the last test was fine with no burnt led everything seems with no problem.
the reason for the shorting led of the 1st test is because i used 3 XPG and 3 XPE all in one series.
last test witch worked well i used 6 XPG in a series and no problem.
another one i rigged 6 XPE in a series separate buckpuck with no problem too.
i am happy with the results because i am planning to place an order tomorrow for the drivers.
all in all i only managed to burn 3 XPE royal blue.

mseepman · #3 02-09-2011, 06:37 PM

Doing large series strings using those Thomas Research drivers is dangerous. Unless you are an electrician, I wouldn't even suggest it. Keep the strings small in series or do parallel with resistors and fuses.

nlreefguy · #4 02-09-2011, 09:20 PM

Hmmm... I have XP-G's, XR-E's and XP-E's all mixed up in the one string powered by a Meanwell ELN-60-48D with no problems so far. (?!?)

mseepman · #5 02-10-2011, 12:00 AM

Quote:

Originally Posted by nlreefguy

Hmmm... I have XP-G's, XR-E's and XP-E's all mixed up in the one string powered by a Meanwell ELN-60-48D with no problems so far. (?!?)

If that's the case, you should be running it at 700mA so that you don't burn out the XR-E's...running them at 1000mA will kill them far more quickly than you want to.

nlreefguy · #6 02-10-2011, 02:00 AM

yes, perhaps I'd better split them up.... or dial back the drivers - these things put out enough light that I wouldn't need to worry about running them at 1000mA anyway. Curiously, everything is going well....

nlreefguy · #7 02-10-2011, 02:02 AM

Actually, just figured I'd go in and check that out to be sure and no, actually, I was not right. The only mix is XP-G and XP-E. The XR-E's are all on a separate driver.