large-voltage LEDs to middle-power Luxeon line

Philips Lumileds has announced the Luxeon 3535 HV LED household that, since the model suffix implies, operate from higher voltages -- 24V and 48V versions are available. The larger forward voltage simplifies driver layout simply because the voltage drop from the AC line electrical power is significantly less than in normal low-voltage LEDs, along with the lesser variation can result in superior efficacy.


Using the new LEDs, Lumileds is focusing on what it terms space-constrained, solid-state lighting (SSL) applications together with retrofit lamps, downlights, and wall-mounted luminaires like sconces. Lumileds merchandise manager Michael Howley said, "We're getting that companies of wall packs, wall sconces, and pendants in many various regions from the world are keen on high-voltage LED technologies as well as the layout simplicity it affords."


The benefits of a large forward voltage are manifested straight in driver part count, according to Lumileds. "The advantage of creating in high-voltage LEDs is the fact that they utilize drivers containing on normal significantly less than 20 components, relative to normal LED drivers that may have up to 50 components," mentioned Howley. "As a result, the complete BOM value is usually diminished and the amount of stock they require to carry to style the driver is minimized."


The brand new mid-power LEDs do trail the latest high-power LEDs in terms of efficacy. At a 4000K CCT, efficacy tops out at 125 lm/W for your 24V model when driven at 20 mA and characterized at a 25￠XC junction temperature. These situations yield an output of 120 lm, and the LEDs deliver CRI of 80 throughout the board.


Lumileds only entered the mid-power LED area focusing on standard lighting applications final yr. The organization announced the 3535 2D loved ones, for instance, final Could. The corporation now intends to broaden its position in what it considers a fast-growing section. Indeed, in an interview final October, CEO Pierre Yves Lesaicherre foreshadowed a broader mid-power household to the way.


Some industry gamers have questioned the dependability of mid-power units, primarily in applications this kind of as downlights or retrofit lamps the place temperatures get pretty large. Certainly, we have a attribute post authored by Cree that information some dependability difficulties with mid-power gadgets. Generally the report questions the dependability of plastic LED packages.


Considering the fact that getting into the mid-power marketplace, nonetheless, Lumileds has insisted that it might apply technology gleaned from its high-power LEDs to your lower-cost solutions. The organization has yet to reveal particulars of how the new LEDs are packaged or constructed. But Rahul Bammi, vice president of advertising and marketing at Lumileds, stated, "Lumileds' meant purpose is identical reliability for mid-power and high-power LEDS."


Lumileds explained that it truly is delivering LM-80 lumen upkeep information for its mid-power LEDs that might supply backing for long-life claims. Also, the company stated that the new LEDs are becoming presented using a alternative of 3- or 5-step MacAdam ellipse shade bins -- color uniformity typical to discrete high-power LEDs.