LED identify

LED Flashlights – General Info
1

Hi to all, I am new here and I need help identifying a white LED wich draws 700mah at 3,2v. It is recovered from a car LED headlight . They were 4 in series connected, I believe for LOW headlight. From calculations, the led should be around 2w, but I do not know the max mah rated. PS I plan to use the LED in a flashlight with a NANJG C driver from FT but I am not sure if I will ,,burn" it because the driverr are rated 1400-2100-2800mah...... Please help, thenks in advance.

http://fastupload.rol.ro/efa8e838ec16e8e370da2f7abdd4588a.html

2

Osram OSLON Black Flat

3

1400mA if you have an ordinary Alumiminum MCPCB
2800mA if you have a DTP copper MCPCB (this requires you to reflow the LED on a DTP copper MCPCB) Yeah you overdrive the LED, but well you know… BLF

4

Thank you very much, I just downloaded the datasheets……… :slight_smile:
They have Aluminium heatsinks….
I plan to draw 700mah from the battery…
The https://www.fasttech.com/products/1612/10001683/1122300 will supply more than 700mah if they are rated 2100mah ?
Thanks

5

If a driver is rated 2100mA output (not mAh) then it should supply that as long as the voltage of the cell is higher than the forward voltage of the LED for that particular current (2100mA)
You can go higher than 700mA, LED is rated up to 1500mA constant

6

Thanks, I will order the 1450ma or less variant of the driver.
Have a nice day !

7

That led will be fine with 2100ma driver, if you are looking for more output.

If output is not important then the 1450ma driver will be a conservative and safe option.

8

Wouldn’t this depend on the thermal cooling capacity of host the OP is using though?

9

I would say at 2100mA in a normal host the LED will get too hot on a stock aluminium non DTP board.

1500mA max for this one.
A convoy S2+ at 2100mA gets too hot to touch if left alone, the LED will be for sure beyond 150°C on a cheap star.

10

Regarding thermal cooling… we should also factor in the intended usage of the OP. If he intends it to be a constant ON application, versus a short burst kind of thing… with or without airflow or in-hand thermal contacts…etc.

11

I would stick to the maximum rated current when you use it on a ‘non direct thermal path’ board.