LED CREE XR-E Q5 DRIVER QUESTION!!

[klm74511]

Hi,
anyone can advice me about a Driver for this led CREE XR-E Q5,
i would like to supply the led with 3X RCR123A instead of
normal conf of 2X RCR123A.
Best regards,
Marco

 

[VidPro]

because you will have more battery voltage than led voltage, you would want a "buck" type of driver. one that accepts a 12.3V maximum input, and drives a single led.

there are not as many cheap choices for that setup, as the cheap drivers would prefer you use 2 cells, and a max input of about 8-9V
any of the 3 curcuits you see here http://www.taskled.com/compare.html that specifically say BUCK would work. see the maximum input voltages are all sufficient.

the bucktoot http://www.ledsupply.com/bucktoot.php would work with a dismal output :-(

the power puck, a big sucker for a flashlight http://www.ledsupply.com/02008b-700.php would work comes in 700ma and 1000ma for that nice overdrive. better for a area light (sizewise) than a flashlight, but itll work.

a Downboy http://theledguy.chainreactionweb.com/product_info.php?cPath=48_49_61&products_id=218 with dismal output at 400ma

a Shark http://theledguy.chainreactionweb.com/product_info.php?cPath=48_49_61&products_id=1089 wont work without more leds.

oops, made a correction already.

 

[LukeA]

You could run 2 or 3 bucktoots in parallel, or get a Buckpuck which can take 5-32V, and output up to 1A.

 

[acourvil]

a Shark http://theledguy.chainreactionweb.com/product_info.php?cPath=48_49_61&products_id=1089 should work
oops, made a correction already.

The Shark is a boost driver; using it with 3x RCR123As and a single emitter will likely fry both the emitter and the shark. But you could always add 2 or 3 more emitters . . . .

 

[Mash]

You could try Kais 18V max voltage drivers.

 

[VidPro]

The Shark is a boost driver; using it with 3x RCR123As and a single emitter will likely fry both the emitter and the shark. But you could always add 2 or 3 more emitters . . . .

I fix , thanks.