KuKu427
Newbie level 1
LED driver design wanted
Hello, I am looking for a freelance EE who can design an LED driver for a flashlight.
16mm board
single LED: Cree XP-G (also needs to be compatible with Cree's new XM)
Single cell: 0.8v to 4.2v input range. I plan to use this driver with AA alkaline, AA NiMh, CR123, RCR123, 14500 li-ion, 17650 li-ion, 18650 li-ion.
Minimum efficiency of 85% with li-ion cells.
Up to five vendor programmable modes with an output range of 2mA to 1.2A.
User interface: Driver will memorize the mode if the light is on for more than x seconds. If the light is on for less than x seconds it will switch to the next mode when the light is turned on again.
Positive contact blocker reverse polarity protection.
I understand that 1.2A output is not obtainable with certain cells listed above. 1.2 amps is require only with 3.7v li-ion cells. Max output can be lower with other cells as required to stay within safe battery discharge rates.
Mode memory timing, max output, number of modes and output levels would be adjustable with the proper equipment via contact pads.
Please contact sku@expandku.com if you are interested or of you would like more details.
Hello, I am looking for a freelance EE who can design an LED driver for a flashlight.
16mm board
single LED: Cree XP-G (also needs to be compatible with Cree's new XM)
Single cell: 0.8v to 4.2v input range. I plan to use this driver with AA alkaline, AA NiMh, CR123, RCR123, 14500 li-ion, 17650 li-ion, 18650 li-ion.
Minimum efficiency of 85% with li-ion cells.
Up to five vendor programmable modes with an output range of 2mA to 1.2A.
User interface: Driver will memorize the mode if the light is on for more than x seconds. If the light is on for less than x seconds it will switch to the next mode when the light is turned on again.
Positive contact blocker reverse polarity protection.
I understand that 1.2A output is not obtainable with certain cells listed above. 1.2 amps is require only with 3.7v li-ion cells. Max output can be lower with other cells as required to stay within safe battery discharge rates.
Mode memory timing, max output, number of modes and output levels would be adjustable with the proper equipment via contact pads.
Please contact sku@expandku.com if you are interested or of you would like more details.