Osram Opto Semiconductors GmbH of Regensburg, Germany has introduced a new two-chip version of its Oslon Black FlatOslon Black Flat LED, targeting automotive applications.
As with other LEDs in the Oslon Black Flat family, the new version features a high level of brightness and is suitable for all headlight functions. Due to the firm's UX:3 chip technology (which improves thermal resistance), the new Oslon Black Flat features high light output even with high currents (more than 500 lumens at 1A). The high brightness is emitted from a very compact package, with dimensions of 3.1mm x 3.75mm and a height of 0.5mm. "We are bringing into our portfolio a significantly slimmer LED than the previous version to enable even more compact headlight systems," says LED product marketing manager Michael Martens. The new 2-chip LED is suitable for all headlight functions such as low beams and high beams and fog lamps, and is ideally suited for daytime running lights with light guides (where optical in-coupling is key), reckons Osram Opto.
Picture: Oslon Black Flat LED, now available in two chip configuration.
Cost savings via SMT
The new LED's main advantage is that, as an SMT (surface-mount technology) component, like other electronic components it can be attached directly to the printed circuit board and then processed with other components as part of a standard soldering process. "This soldering capability enables integration of the LED into a simple, standardized process and reduces the complexity of the processing steps, which saves a good deal of time and costs," says Martens.
Good stability and homogeneous light distribution
Further benefits of the Oslon Black Flat LEDs are their homogeneous distribution of light, very good contrast ratio and cyclic stability, says Osram Opto. The black QFN (quad flat no leads) housing expands in a similar manner to the circuit board during high temperature cycle loads. Soldered joints are hence considerably stronger and exposed to much less strain.
A special sealing technology, together with the sophisticated package and a ceramic phosphor converter, enables a highly uniform distribution of light as well as good contrast conditions on roads, claims Osram Opto. This is abetted by the chip encapsulation (which allows a defined bright/dark border in the light beam) as well as the high contrast of the luminous surface of both chips in relation to the package.
Samples of the Oslon Black Flat are available now, and volume start-up is planned for the beginning of 2014.
