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Osram Opto unveils first chip-on-board LED

The Soleriq E nitride LED for downlights can cope with requirements demanding high lumen packages between 1500 and 4500 lm

Downlights provide high-quality background lighting in shopping malls, offices, industrial buildings and high-end residential premises.

The luminaires used in these places need a high luminous flux to make you feel comfortable. Osram Opto says this is just what its new Soleriq series , claimed to incorporate the first chip-on-board LED, provides. Even at high application temperatures they create the basis for highly efficient luminaires with a luminous flux of 1500 lm to 4500 lm.

Large lumen packages for use in downlights – the new chip-on-board LED Soleriq E

Only one Soleriq E LED is needed to give a luminaire enough light. This makes designing luminaires much easier because only one component has to be integrated instead of multiple LEDs. The individual chips are all under the conversion layer (chip-on-board), giving the impression of a homogeneous light emitting surface.

Ensuring a uniform colour and light appearance in the luminaire and even coupling into external light-guiding optics is very simple. The light generated can be used with much lower optical losses, making the LED lamps and luminaires more efficient. Osram says typical LED benefits such as high energy efficiency and long lifetime have an excellent impact on downlight performance.

The Soleriq E, available in two versions, covers the entire colour spectrum from 2700 to 6500 K. Even at a temperature of 85°C, which corresponds closely to the temperature in the application, the two LEDs offer an impressive efficiency of 103 lm/W at 4000 K. At this temperature the 36 mm x 36 mm x 1.7 mm E 45 achieves a typical brightness of 4000 lm (rated current 880 mA); the 30 mm x 30 mm x 1.7 E 30 produces a lumen output of 2700 lm (at 600 mA).

Good colour homogeneity is achieved by the narrow white grouping of the Soleriq E, corresponding to a range of 4-step MacAdam ellipses. For solutions that need a particularly high level of colour homogeneity, grouping based on 2-step MacAdam ellipses is also available.

High colour homogeneity in the application: Soleriq E is grouped by 4-step MacAdam ellipses

Andreas Vogler, Marketing Manager General Illumination at Osram Opto Semiconductors, says,  “Downlights are in widespread use in many areas such as shop, office and residential lighting but need high lumen packages between 1500 and 4500 lm to perform their task. We can achieve these high values with just one LED component. This makes it easier to couple the light into external optics and to integrate the light source in the luminaire.”

Both the E 30 and E 45 have a beam angle of 120° and a lamp life of over 50,000 hours. Thermal resistance is 0.38 K/W for the E 30 and 0.25 K/W for the E 45. Both devices also have a metal core board.
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