Osram Opto Semiconductors GmbH of Regensburg, Germany has launched a new generation of its compact high-power Duris S 8 LED with significant efficacy improvement of up to 17%, achieved by introducing a new leadframe material and chip generation.
Available in the same 5.0mm x 5.0mm footprint, the new LED is available in three different lumen packages (GW P9LM31.EM, GW P9LR31.EM and GW P9LT31.EM) containing six, eight or ten chips yielding different luminous flux brightness levels of 375, 500 and 610 lumens (typical), respectively, at a correlated color temperature (CCT) of 3000K.
Due to an enhanced epoxy-based package, the new LEDs offer long lumen maintenance, even at high currents and temperatures. With a forward voltage ranging from 19V to 32V (depending on type), simpler and more compact driver designs can be realized, says the firm. Due to the high-lumen packages, single light source design can be implemented, avoiding multiple shadows, simplifying lens and PCB design, and leading to lower systems costs as well as improved total system efficacy of up to 17%.
Exhibiting a color rendering index (CRI) of 80 and correlated color temperatures (CCT) between 2700 and 6500K, the new Duris S 8 LED has improved efficacy of 135lm/W for the six- and eight-chips versions and 131lm/W for the ten-chip version (at a CCT of 3000K and a drive current of 150mA). All three versions of the multi-chip LEDs are binned according to the McAdams principle, based on a 3-step or 5-step MacAdams ellipse for color consistency. To create realistic application conditions, the new LED is grouped at 85°C instead of at room temperatures for color binning. The new product generation is hence suitable for use in indoor lighting solutions, especially for directional retrofits, spotlights and downlights.
The new Duris S 8 is pin-to-pin compatible with the previous generation (and hence usable with the same optics and accessories), so users can find the optimal LED for their lighting application (e.g. omnidirectional and directional retrofits or downlights), says the firm.
