Allegro MicroSystems, Inc. Announces New Series of White Multi-Chip LEDs 
Allegro has released a new series of white multi-chip LEDs that provide a range of high-powered InGaN white LEDs that can be used in general lighting applications, amusement and gaming equipment and for backlighting TFT displays. Each module combines either six or eight LEDs in one to four separate channels. Modular design allows the SEPW devices to be easily assembled into string arrays by simply connecting the modules in a series. The devices also provide superior color balance throughout the display because of the high density of LEDs that can be achieved. This minimizes the distance that power and control lines must run between LED modules and from the LED modules to the control electronics.
The white thermoplastic case is an innovative design with exceptional heat dissipation properties. The white resin compound is formulated for superior reflectance and transmittance of the generated light. Enhanced thermal dissipation is achieved through the incorporated heatsink on the bottom of the package. The heatsink can be mated directly to an external radiator through the PCB for superior heat conduction allowing dense placement of modules.
The leadframe is plated with silver, providing a highly-reflective surface for the bottom and sides of the emitting area. The terminals and heatsink are also silver-plated.
Allegro’s new SEPW series of LEDs is priced at $4.86 in quantities of 1,000 and has a 12 week typical lead-time to market.
Seoul Semiconductor’s New LED Delivers Brightness of 900 lm at 10-watt
Seoul Semiconductor has released the ultra bright LED, Z-Power P7 series. The Z-Power P7 series, which the company has now started producing in volume quantities, delivers a brightness of 900 lumens at 10-watt. The 10W P7 single LED package produces luminous flux of 900 lumens – much higher than the 60-watt general residential incandescent lamps, which only produce 660 lumens. The Z-Power P7 series has an efficacy of 90 lumens per watt from a single package, which is eight times higher than incandescent lamps.
The Z-power P7 series overwhelms incandescent lamps in terms of energy efficiency, a significant development that signals LED’s penetration into the general lighting market is just around the corner. Compared to general 60-watt incandescent lamps, which provide an efficacy of approximately 11 lumens per watt, Z-Power P7 series emits light at 900 lumens and has efficacy of 90 lumens per watt. This breakthrough is happening at a time when rising oil prices and environmental concerns have fueled the interest for energy- efficient systems all around the world.
Seoul Semiconductor’s Z-Power P7 series can be applied in many fields such as general residential lighting, streetlights, a variety of task lights, high-end flashlights for military, police or rugged use, and landscape lighting requiring extremely bright light.
“Development of the 900 lumens, 90 lumens per watt P7 Series is a milestone achievement that reinforces Seoul Semiconductor’s leadership position in the global LED industry,” said Hyuk Won Kwon, a general director of Seoul Semiconductor’s power LED business department. "We will develop new ultra high power products emitting over 1,000 lumens during the third quarter of this year to consolidate and continue advancing our technology.”
Leadis Technology Expands Its High Efficiency, Six Channel LED Driver Family With 1-Wire Interfaces
Leadis Technology, Inc. has released sample availability of the LDS8867, LDS8868 and LDS8869, a new family of charge-pump based LED drivers that uses the company's proprietary PowerLite Current Regulator to deliver up to 95 percent power efficiency for longer battery life.
Targeted at mobile backlighting applications, the latest LED driver device family supports up to six LEDs with a maximum current of 32 mA per channel. The new 1-wire interface products join the previously announced PWM interface products to give mobile phone design engineers more flexibility with a new set of performance/interface choices.
"Leadis is committed to making mobile phones more efficient as they evolve to deliver not only voice data but many other multimedia features such as internet, digital photo stills and videos, GPS, as well as cell phone gaming," said Adolfo Garcia, Senior Director of LED Drivers at Leadis Technology. "As these portable applications continue to proliferate, optimizing the LED driver's efficiency becomes essential. Leadis' LED drivers will continue to address and improve on the most important requirement in these mobile appliances: longer battery life."
Leadis' ultra low-voltage dropout PowerLite Current Regulator provides a typical transition threshold of 50 mV, allowing a device to stay in a charge-pump driver's highest-efficiency mode longer than competing products. Additionally, this patent-pending technique also solves one of the most significant problems associated with charge-pump based LED Drivers, namely the transition between the high-efficiency state (1x-mode) and the lower efficiency states. By lowering the drop out voltage of the driver to 50 mV, battery life can be extended by up to 20 percent.
The LDS8869 is a high-efficiency multi-mode fractional charge pump with ultra low dropout voltage that can drive up to six LEDs. The addition of a 1.33x fractional charge pump mode and ultra low dropout PowerLite Current Regulator increase the LDS8869's efficiency up to 95 percent. The 1.33x mode requires no additional external capacitors. Its EN/SET logic input functions as a chip enabler and LED current control.
Maximum LED current is 32 mA and can be programmed from 0.5 mA to 32 mA in 0.5 mA increments. The multi-fractional charge pump supports a wide range of input voltages from 2.7 V to 5.5 V. The device is available in a 16-lead TQFN 3 mm by 3 mm package with a maximum height of 0.8 mm.
The LDS8868 is a high-efficiency multi-mode fractional charge pump with ultra low dropout voltage that can drive up to six LEDs. The addition of an ultra low dropout PowerLite Current Regulator increases the LDS8868's efficiency up to 93 percent. Its EN/SET logic input functions as a chip enabler and LED current control.
Maximum LED current is 32 mA and can be programmed from 0.5 mA to 32 mA in 0.5 mA increments. The multi-fractional charge pump supports a wide range of input voltages from 2.7 V to 5.5 V. The device is available in a 16-lead TQFN 3 mm by 3 mm package with a maximum height of 0.8 mm.
The LDS8867 is a multi-mode fractional charge pump with low dropout voltage that can drive up to six LEDs with up to 90 percent efficiency. Its EN/SET logic input functions as a chip enabler and LED current control. Maximum LED current is 32 mA and can be programmed from 0.5 mA to 32 mA in 0.5 mA increments. The multi-fractional charge pump supports a wide range of input voltages from 2.7 V to 5.5 V. The device is available in a 16-lead TQFN 3 mm by 3 mm package with a maximum height of 0.8 mm.
Everlight XcelLED High-Power LEDs Combine High Luminosity (90 Lumens Per Watt) and Low Thermal Resistance in Wide Variety of Package Formats
Everlight Electronics Co. Ltd. has introduced 1- and 3-watt high-power LEDs that deliver high luminosity, long operating life and system efficiency in a broad range of designs. Part of Everlight’s XcelLED series, the EHP-AX08/P01 (1-watt) and EHP-AX08/P03 (3-watt) families are among the highest-flux emitters on the market. Applications that benefit from EHP-AX08 LEDs include backlighting (CFFL replacement in LCD TVs and screens), automotive lighting (interior and exterior signaling), as well as architectural, aerospace and emergency lighting.
Everlight’s EHP-AX08 emitters feature a silicon lens, high luminous flux (up to 90 lm/W) and low thermal resistance (15°C/W, Typ.). Sized in an industry-standard 8 mm by 8 mm by 5.7 mm SOP package, these LEDs are designed to handle higher reflow soldering temperatures and unlike other packaging methods, their silicon encapsulation prevents accelerated degradation. EHP-AX08 devices optimize heat control by providing low thermal resistance, alleviating a primary concern in LED applications. And, in addition to increasing brightness, EHP-AX08 LEDs save power since their high-lumens output allows the LED to be driven at lower currents.
Furthermore, Everlight’s two EHP-AX08 LED families increase design flexibility by offering many different configurations and device options. Each LED in both the 1- and 3-watt family, for instance, offer a choice of four lenses (Lambertian, Batwing, Side-emitting and Focus), eight basic colors including white (and at least two versions of each), as well as a star heat sink for each configuration. Along with all available device options, Everlight offers precise binning for luminous flux, forward voltage, dominant wavelength and color temperature, allowing strictly regulated end solutions.
“By reaching up to 90 lumens, Everlight’s new high-power EHP-AX08 LEDs meet the growing market demand for brighter products,” said Ewing Liu, Everlight’s High Power/High Bright technical marketing manager. “Moreover, the many device options offered by both the 1 and 3-watt families provide total design flexibility in an array of applications.”
Prices range from approximately $1.00 for standard, 1-watt versions to $2.20 for 3-watt versions (in production quantities).
AgiLight Launches New TuffRayz Affordable, Ultra-Robust LED Channel Letter Modules
AgiLight Inc. has introduced TuffRayz, its affordable, ultra-robust LED modules for channel letters and signs. Durable and extremely weather-resistant, TuffRayz provides low-cost, energy-efficient LED lighting solutions for indoor and outdoor signage. TuffRayz offers fully potted circuit protection and delivers up to 30 percent greater brightness than other entry-level LED systems. TuffRayz also provides longer runs, up to 100 feet per 60-watt power supply. Designed with a low-profile depth of just 0.375-inch and wide beam angles for improved performance in shallow letters. TuffRayz’ oval shape and multiple mounting options facilitate quick and easy installation. Available in red, amber, green, blue and white.
Laird Introduces T-Lam SS LLD Laminate for BLU LED Light Engines
Laird Technologies has released its new T-lam SS LLD, a metal core printed circuit board (MCPCB) laminate for LED applications. This new environmentally friendly laminate is designed to keep bright and ultra-bright LED light engines burning brighter, longer and uniformly.
Laird Technologies’ new T-lam SS LLD features a copper circuit layer and aluminum base plate bonded together with the company’s T-lam LLD dielectric. T-lam SS LLD laminates are processed through standard circuit board manufacturing and assembly processes.
Circuit boards designed with T-lam SS LLD allows LED light engines to last longer than competitive materials and provides a uniform thermal path for consistent output of LED light strips. The dielectric’s unique microstructure allows the assembly to withstand thousands of thermal cycles due to CTE mismatch.
“The LED BLU for LCD TVs and street light production will more than triple in 2008,” said Robert Kranz, global product director. “Laird Technologies has partnered with ITEQ to provide high volume laminate production for these explosive markets.”
T-lam SS LLD is well suited for LED lighting applications, specifically LED BLU for TVs and monitors, as well as light engines for street lights, commercial property safety lighting and general lighting applications.
Schréder Lighting USA to Pioneer LED Street Lighting for Urban Applications in the US 
Breaking new ground in urban lighting, Schréder Lighting USA is pioneering high-quality, performance-based Street Lighting using LEDs for the American specification market. Schréder Lighting USA, the newest of the 40-member Schréder Group G.I.E. located in 36 countries on four continents, is marketing the Schréder brand in the fields of Public Lighting, Floodlighting, Tunnel/Transit Lighting, Industrial and Urban Lighting.
Schréder Group G.I.E. recently collaborated with Cree, Inc. to illuminate the popular Riviera waterfront in Split, Croatia that is visited by millions of travelers annually. Delivering the photometric performance and visual comfort to overcome the challenges of urban applications, Schréder created elegant, custom-designed Streetlights featuring the warm, white glow of Cree XLamp XR-E LEDs. Schréder’s appealing walkway luminaire incorporates 180 high-power XR-E LEDs, each producing up to 124 lumens at a remarkable 3,000K and leading the industry in brightness for warm-lighting applications.
Luc Coppers, Engineering Manager for Uitrusting Schréder Belgium, explained, “LEDs provide directional lighting, which requires extreme precision in orientation when used for urban lighting. This was the challenge that Schréder’s designers and engineers solved by creating beautiful and functionally optimized fixtures for the waterfront promenade. The Cree XLamp XR-E is the only warm white-power LED with the performance characteristics that meet the brightness, color stability and uniformity requirements of this installation. Together we have created a stunning evening social destination, in just three months.”
“Using the innovation and technical expertise demonstrated on this recent project,” explained Mr. Rob Verbeelen, President of Schréder Lighting USA, “We are planning to initiate and implement high-quality, performance-based street lighting solutions using LEDs for the American specification market. For more than 80 years, the Schréder Group has been designing high performance lighting solutions aimed at improving comfort, safety, and aesthetic value of the outdoor and urban landscape. The Schréder Group takes pride in promoting its ‘Partner in the City of Tomorrow’ philosophy. Our products are developed to create atmosphere, optimize visual comfort, limit light pollution, and enhance the landscape.”
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