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Optoelectronics/Displays??

High-brightness LED touts low thermal resistance

Posted: 14 Jan 2009 ?? ?Print Version ?Bookmark and Share

Keywords:high brightness LED? 1W star shaped LED? solid-state lighting?

OV4Z Optimal IV Star Series

Optek Technology has developed a star-shaped red/green/blue/amber LED assembly by integrating four 1W LED die into a single assembly for solid state lighting applications.

Designated the OV4Z Optimal IV Star Series, the LEDs are offered in mono-color or RGBA packages and feature a recessed die design that houses four LED chips under a 5mm optical-grade water clear lens. The assemblies achieve an extremely low thermal resistance of The bright OV4Z devices are suited for applications including large signage; interior, exterior and landscape architectural lighting; recreational areas such as pools, spas and boats; and specialty lighting including vending machines, display cases and stage lighting.

The Optimal IV Star Series assemblies feature emitted colors of blue (455- to 460nm), green (530- to 535nm), red (620 - 630nm), amber (585 - 595nm) and daylight white. Typical forward voltage at 350mA

ranges from 2.5V to 3.9V for the RGBA devices, and 8.6V to 13.1V for the mono-color assemblies, while luminous flux at 350mA ranges from 5lm to 36lm and 29lm to 162lm, depending on LED color. Viewing

angle for both the RGBA and mono-color assemblies is 60C. Maximum allowable junction temperature is 130C, with an operating temperature range of -50C to +100C.

The mono-color assembly is available with mounting pads, while the RGBA assembly is available with through-hole pins or mounting pads for surface mount electrical connections, along with six locating slots for mounting screws. The assemblies are 21mm in diameter on a 1mm thick star-shaped PC board.

"The combination of red, green, blue and amber high-brightness LEDs provides solid state lighting designers with an extensive number of color combinations," said Alan Bennett, VP of sales for

Optek. "The star-shaped assembly results in a simplified mounting configuration, while the design of the part provides customers with optimal luminous intensity and transfer of heat generated due to increased current value."

Typical pricing for the Optimal IV Star Series ranges from $7.78 to $10.37 in quantities of 1,000, depending on color. Lead time, if stock is not available, is from six to eight weeks.





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