TV LED Strips

Thread Starter

Kubes

Joined Jan 31, 2023
7
(I hope this is the correct place to post this)

Hello, I am looking for help identifying SMD LEDs so I can get the datasheet or obtain educated guesses (some I am unqualified to do) as to the specs.

I replaced the LED strips in my Sharp TV and want to reuse the old strips. I am looking to get the max current. An individual LED shows a Vf as 2.5 using a DMM. There are 5 LEDs in series per strip, and it takes about 12.5V (w 9mA) to start to light them. I want to drive them with as much current as possible to obtain the max brightness (I am building shop lights from them), but I am concerned about overdriving them. They are cool or bright white 3.10 x 3.10 SMD, see pics. Looking at online catalogs, it seems 150mA to 200mA is typical for this size white LED, correct? There is a marking of "1838 Max" on the strip, is that Watts? I am guessing 1838W / 12.5V = 147mA... thoughts?

Thanks for the help.

Here are the results of connecting on the strip w/ bench power supply using CC. I measured the temperature on the face of the LED.

VmA (measured PS)mA (set PS)degree C
12.509
13.320
13.852
14.5511210064
14.7513212074
15.0414213078
15.1016315083
15.63214200106

PICA0003.jpgPICA0004.jpgPICA0005.jpg
 
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