Electronics > Beginners

Help identifying an LED. I think its a 3528 or a 2835

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TT_Vert:
I've seen the same thing the said the difference was the pads.  Bickering aside, can someone perhaps answer my question above regarding current draw discrepancies of what I had vs. the item I'm ordering?

Jwillis:
Phosphor-converted LEDs such as the 2835 have one single chip that emits Short wave length High energy Blue or UV .The phosphor coating converts some of the blue or UV photons by colliding them with the phosphorous in the coating thereby decreasing the some of the photons energy to Yellow.Mixing Yellow photons with Blue or UV photons produce White light.Higher power pcLeds may have multiple chips which can be observed by dimming the led with lower voltages.Even multi pin pcLeds like the 5050s I have work with the same principle as single pcLEDs but have 3 chips .This gives a higher intensity of light. Since the chips emit  Blue or UV they have forward voltages around 3 - 3.5V. The higher the energy of photon required means the higher the energy needed to excite that photon emitted from the chip.
15 series chips supplied by 110v-120v  means that each chip receives around 7-8 volts. Each chip requires a minimum of 3-3.5 volts (forward voltage) to turn on.This would mean that each chip are rated for at the very least 9v but are most likely rated for 12V . 12V PLCC (Plastic Leaded Chip Carrier) LEDS are the most common used. So a 2835 rated 12V with a kelvin of between 5000 and 6500 would give cold white light

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