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BridgeLux touts 1.524mm 'bulb buster' LED chips

Posted: 11 Jul 2006 ?? ?Print Version ?Bookmark and Share

Keywords:BridgeLux? KO series? LED chips?

1.524mm LED chip

LED chips supplier BridgeLux Inc. has introduced the KO family of LEDs, including the 1.524mm chip touted to be the only LED chip of this size available in production volumes today.

Power-LEDs are generally recognized as those devices that operate at 350mA and greater current, and are appropriate for solid state lighting applications requiring maximum brightness in minimum space, including automotive forward lighting, camera flashes and general illumination. The increased efficiency and reliability of solid state lighting promises to help reduce worldwide energy consumption.

"The development objective with the KO series was to reduce the input voltage while increasing the overall light extraction. The net result is a fully scalable family of LED chips that yields a 10 to 30 percent increase in its light output efficiency," said BridgeLux CEO Dr. Robert Walker. Decreasing the input or "forward" voltage required for a given drive current results in a device with lower overall power consumption and lower heat generation for a given amount of light, all of which contribute to producing more "lumens-per-watt."

An LED's low profile and compact size present opportunities to develop innovative new packages that are not limited by a traditional incandescent or fluorescent bulb's space requirements. The KO blue family is available in 1.524-, 1.016-, 0.762- and 0.6096mm chip sizes. Color choices range from 445nm to 475nm blue, as well as high efficiency cyan and green. Die bonding options include traditional silver epoxy as well as the newer eutectic techniques.

When combined with phosphors to generate white light, depending upon packaging design, the 1.524mm KO can support up to 1.2A drive current enabling a targeted white output of 140 lumens. The entire family is designed to stand up to 150?C junction temperatures and 40 percent higher drive currents than is commonly found for similarly sized devices, the company said, all without compromising overall reliability.

Walker added that "these chips are designed for brightness. Combining six of these devices produces roughly the light output of your typical 60W incandescent bulb, but requires less than one-third the power. We've nicknamed the 1.524mm KO, "the bulb buster" since we have something here that can really begin to challenge traditional lighting solutions in general purpose illumination."

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