22 March 2011

Lumileds launches its first high-voltage LED, using rectified AC

Philips Lumileds of San Jose, CA, USA has expanded its LUXEON LED portfolio for the illumination market with its first high-voltage emitter. The new LUXEON H emitter joins the recently released LUXEON S (the first product with ‘Freedom From Binning’), and the LUXEON Rebel and LUXEON Rebel ES (the most widely used power LEDs).

LUXEON H emitters are driven directly with rectified AC voltage rather than constant DC current. This high-voltage architecture maximizes space for additional thermal management, permitting an increase in the thermal limit for even the smallest bulbs, says Lumileds. The 50V LUXEON H flexibly supports both 110V and 240V solutions.

Picture: LUXEON H LEDs and the electronic components required for a system.

Designed to meet the demands of space-constrained retrofit bulbs, LUXEON H emitters deliver what is claimed to be industry leading thermal performance and reliability as well as high-quality, warm-white light. Two correlated color temperatures (CCTs) are available, 2700K and 3000K, with typical color rendering indexes (CRIs) of 83. Typical flux is 84 lumens and 90 lumens, respectively, for the two CCTs. The LUXEON H emitters are identical in footprint to the existing compact LUXEON Rebel and LUXEON Rebel ES LEDs, simplifying implementation.

“Our thin-film flip-chip technology allows us to continue to develop innovative solutions, like the multi-junction die in LUXEON H, for the illumination market,” says Frank Harder, VP of product marketing for LUXEON. “The base of some bulbs is so small that it’s impossible to fit both an electronic driver and a heatsink in the space. LUXEON H only requires a bridge rectifier and a resistor, both of which are very small, and the remaining space can be used for thermal management,” he adds. “And, because we don’t use direct red die like most other HV solutions, LUXEON H offers consistent, stable color from the instant the LED is powered and maintains its color through its lifetime.”

Initial uses of LUXEON H are expected in the retrofit bulb market, where form factors for the bulbs are already defined and space is at a premium—especially so for the smallest bulb types ranging from the candelabra to the intermediate Edison, E10-E17 types. Lumileds expects new solutions using LUXEON H to come to market during second-quarter 2011.

LUXEON H is in volume production and is available with standard lead times from Future Lighting Solutions.

See related items:

Lumileds introduces ‘Freedom From Binning’

Tags: Lumileds LEDs

Visit: www.philipslumileds.com

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