(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.
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.
V | mA (measured PS) | mA (set PS) | degree C |
12.50 | 9 | ||
13.3 | 20 | ||
13.8 | 52 | ||
14.55 | 112 | 100 | 64 |
14.75 | 132 | 120 | 74 |
15.04 | 142 | 130 | 78 |
15.10 | 163 | 150 | 83 |
15.63 | 214 | 200 | 106 |