Super-bright LEDs take ESD protection onboard

Agilent Technologies has developed the industry's first super-bright white InGaN (indium gallium nitride) LEDs with ESD protection.

Agilent Technologies has developed the industry's first super-bright white InGaN (indium gallium nitride) LEDs with ESD protection.

The high brightness and weather-resistant packaging technology makes these LEDs ideal for outdoor applications such as pedestrian crossing signs, speed limit and exit signs, scoreboards and other variable message signs, as well as backlighting for transparent sign panels.

Agilent's HLMP-CWx8 and HLMP-CWx9 series lamps are built with a new InGaN flip-chip die technology for higher brightness, and include a protective zener diode for ESD protection.

They are the first white InGaN LED lamps to be specified with a Class-2 ESD damage threshold as specified by MIL-STD-1686A.

Conventional InGaN LEDs fall under the lower Class-1 classification and can be damaged by discharges of several hundred volts based on the human body model (HBM), whereas this new Agilent LED family can withstand over 8kV.

In addition to reduced susceptibility to ESD, the new lamps are designed for a higher pulsed duty factor for increased brightness.

Their rating of 30% duty factor at 100mA is three times that of similar white LEDs offered by other manufacturers.

The Agilent HLMP-CWx8 and HLMP-CWx9 series, 5mm (T-1.75) white LED lamps are untinted, nondiffused and incorporate Agilent's precision optical performance packaging design and materials.

They are available with the following combinations of viewing angles and respective minimum luminous intensities: 15 degrees, 4200mcd; 23 degrees, 2500mcd; and 30 degrees, 1900mcd (all intensities measured at 20mA current).

The packaging design coupled with carefully selected materials allows the lamps to perform with high reliability over the -45 to +100C temperature range and in applications where the lamp is exposed to UV radiation and high humidity.

Agilent also offers complementary super bright precision optical performance LED lamps in blue, green and cyan using the same flip-chip InGaN material incorporating protective diodes.

Their 470nm typical dominant wavelength for blue and 530nm typical wavelength for green are well suited to colour mixing in full-colour signs, and the 500nm typical dominant wavelength for cyan is suitable for traffic signal applications.

These lamps are specified with a Class-3 ESD damage threshold.

Samples of the HLMP-CWx8 and HLMP-CWx9 series super-bright LED lamps are now available from Agilent and through its worldwide distribution partners.

There is a guaranteed four-week delivery leadtime for these products.

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