Chips on Board-powerful diodes
COB (Chips on Board) is a technology in which semiconductor crystals diodes are mounted directly on a ceramic or aluminum substrate. The LEDs are mounted together as a lighting module. LEDs are flooded with silica gel, epoxy resin or other protective material.
The yellow part is phosphor. Phosphor is a substance that emits the absorbed light from different sources and is clean and safe material.
COB LEDs typically mounted directly onto suitable substrates to cool LEDs. Factors which shortens the life cycle of a diode is the temperature. Potent diodes emit a lot of heat, and their working temperature must not be more than 60-70°.
The light efficiency of the COB LED by AbbreviationFinder is between 100-120lm / W. The color is uniform.
The efficacy of COP diode with smaller capacity is about 15% greater than the high power diodes COP. That is, the light efficiency is less when the chip is larger. Someone COP diodes have an efficiency to 249lm / W, 350mA, while others with larger sizes have an efficiency lumen to watt up to 161lm / W, 20mA.
Optical efficiency M COB (multi-chip embedded on board) LED is about 15% more than at COP diode. When M COB, several chips are embedded in the board. This is LED technology that combines many small chips in a large chip.