Shining bright: Black-flat LEDs generate more light

25th November 2015

Mick Elliott

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The OSLON Black Flat LEDs, from OSRAM Opto Semiconductors are in stock at Mouser Electronics. These multichip white LEDs for front headlamps can generate more light from a small package than any other comparable product, giving automotive, headlamp, and work lamp manufacturers greater design flexibility.

The Black Flat LEDs are small, high-flux light emitting diodes (LEDs) that pack robust brightness and high stability in a slim SMD-4 epoxy package. The LEDs are built on gallium nitride-based UX:3 chip technology, which generates very high luminous flux even at high currents. This brightness is emitted from a comparatively smaller package, which enables very compact headlamp designs.

Designed with surface mount technology (SMT), the LEDs can be easily mounted on a printed circuit board and then processed further as part of standard soldering procedures.

This soldering capability enables the LED to be integrated in a simple, standardised process and reduces the complexity of the processing steps, which saves considerable time and costs, especially compared to previous multichip LEDs.

The black QFN package expands in a similar way to the circuit board during cyclic temperature loads, meaning that the soldered joints are exposed to much less strain and are significantly stronger.

The 500-lm KW H2L531.TE model LED has a low thermal resistance of 1.6 K/W (typical, LED only), a luminous intensity of 174.9 cd, and a color chromaticity of 0.32 (Cx) and 0.33 (Cy) according to CIE 1931.

The 250-lm LUW HWQP model LED has thermal resistance of 4.3 K/W (typical, LED only), a luminous intensity of 87.5 cd, and a color chromaticity of 0.33 (Cx) and 0.34 (Cy). Both models deliver a beam angle of 120 degrees at 50 percent luminous intensity.