Osram Opto unveils two Ostar light-emitting diodes

Osram Opto Semiconductors has introduced two light-emitting diodes (LEDs): Ostar Compact and Ostar Power Projection.

Ostar Compact is designed for small efficient systems in mobile phones, personal digital assistants (PDAs) and MP4 players, while Ostar Power Projection is targeted at high-performance projection applications such as home cinema systems of 70in (179cm) and more.

The LED portfolio from Osram Opto Semiconductors now provides full coverage of the projection system range from 1W to 300W.

Ostar Compact adds to the family of LEDs for small applications at the lower end of the performance range.

It measures 3.9mm x 3.6mm and is available in red, blue, green and white.

These small LEDs are said to be cost-effective components, particularly for pico projectors for small mobile devices.

Manufacturers wanting very compact units can use a double-chip version that contains a red chip and a blue chip in one LED.

This saves space compared with the usual three individual LEDs (red, blue and green).

As an SMT component, the LED can be integrated in standard manufacturing processes.

Integrated ESD protection diodes guard against electrostatic effects.

Ostar Power Projection can be operated with a maximum of 36A and produces light of impressive brightness, according to the company.

Typical values are 2,700lm in red, 3,500lm in green and an optical output of 13W in blue.

While the dimensions of 45mm x 25mm seem large for a standard LED, the thermal resistance is only 0.77K/W.

The LED is suitable for all types of cooling, including water cooling, according to the company.

A uniform cooling system can, therefore, be used for all colours because the junction temperature is the same for all colours (125C).

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