It has moved to phosphor conversion, reasonably than native crimson emission, to beat temperature droop.
The half known as Synios P2720 CR – the initials for ‘transformed crimson’.
“One of many fundamental points with monochromatic LEDs for rear fog functions is the lack of brightness of about 50% in working temperatures of 60°-70°C,” in response to the corporate. “Till now, rear lamp producers needed to compensate for this bodily induced hole by growing the variety of LEDs, which additionally elevated house necessities.”
As a substitute, it’s claiming solely round 10% lack of brightness – see graph left: “Producers profit as a result of fewer particular person LEDs are required. Fewer LEDs means the required warmth sink might be compact, saving house and weight.
There’s a alternative of two chip sizes: 0.5mm2 or 1mm2. Each are available 2.0 x 2.7 x 0.6mm packages.
The die behind the crimson conversion phosphor is blue, with a typical wavelength vary of 442nm – 450nm. Much less that <5% of that blue will get into the output spectrum – see graph proper.
The bigger die model is meant to be pushed at 700mA, the place luminus flux bins can be found throughout 90 to 125 lm (31.4 to 39.1cd luminous depth), and voltage bins span 2.75 to three.5V.
