29 February 2012

Osram boosts Oslon SSL LED efficiency and luminous flux temperature stability

Osram Opto Semiconductors GmbH of Regensburg, Germany says that its new generation of high-power Oslon SSL LEDs has improved performance, with efficiency increased by about 25%. Also, the luminous flux at elevated temperatures has been stabilized, making it is possible to retain almost constant luminous efficacy despite high operating temperatures. Thanks to this optimization, the luminaire design is significantly simplified.

Osram Opto says that the new generation of Oslon SSL LEDs presents a particularly temperature-stable light source. It provides a luminous flux of typically 98lm in warm white (3000K), with an operating current of 350mA at a junction temperature of 85°C in the chip. Typical luminous efficacy of 96lm/W makes it one of the most efficient 1mm2-chip LEDs currently on the market, the firm claims. The combination of higher luminous flux and reduced forward voltage of 3.1V equates to an efficiency increase of about 25% compared with the previous generation. Osram Opto says that this makes luminaire development easier for lighting manufacturers: a smaller number of LEDs can attain the same luminous flux, as well as the same efficiency, as before.

The firm says that the latest developments in chip technology, converters, and package are the key to this optimization of the Oslon SSL’s performance. The higher temperature stability of the luminous flux, even when operating under ‘hot’ operating conditions, greatly simplifies thermal management. “This efficiency enhancement not only implies a reduction of the initial costs incurred by our customers, it also makes the development of luminaire solutions so much easier,” says marketing manager Martin Wittmann.

The new Oslon SSL LEDs are available in ‘warm white’ color (3000K) with a color rendering index (CRI) of 80 (minimum), suitable for interior lighting (type EC) such as in downlights, as well as in ‘cold white’ (5000K) with a CRI of 70 (typical) for use in exterior lighting (type PC). As with the previous products in the Oslon SSL-range, the new products are also available in the small size of 3mm x 3mm and offer two different lenses. Due to the reflectivity of the package, light that is irradiated to the side or to the back is reflected and can be used again. “This LED generation, which combines the converter and reflective package, ensures the best possible light color homogeneity over angle,” claims Wittmann.

Osram Opto adds that the Oslon SSL LED product portfolio is continually being expanded with the addition of further colour temperatures.  

Tags: Osram Oslon SSL LEDs LEDs

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