TI Introduces LED Controller with Constant Power Regulation
Texas Instruments, Inc. has introduced a new LED controller with constant power regulation. The LM3447 AC/DC LED driver includes a dimmer detect, phase decoder and adjustable hold current circuits to provide smooth and flicker-free dimming operation in off-line, isolated LED lighting applications, including A19, E26/27 and PAR30/38 bulbs, as well as can light retrofits.
Traditional drivers use constant current control to accurately regulate LED forward current. This approach produces consistent light output or intensity from LEDs in the same bin. However, once current is applied to the LED, its solder point temperature rises, leading to a decrease in forward voltage and a drop in efficacy. Conversely, by using the new LM3447 with constant power regulation, the LED forward voltage droop over temperature is offset by an increase in LED current to maintain constant LED power. The result is up to 10-percent improvement in efficacy across the expected operating temperature range of the fixture.
The LM3447 joins TI’s portfolio of off-line LED lighting controllers that include the National LM3445, the industry’s first phase-dimmable LED driver with constant current control, and the TPS92310 primary side regulator for non-dimming applications.
The LM3447 is available in volume now from TI and its authorized distributors. Offered in a 14-pin TSSOP package, the suggested retail price is $1.15 in 1,000-unit quantities.
New Mini Zenigata LED Arrays
The new Mini Zenigata arrays of type GW5BxxxK05 provide a luminous flux between 1150 and 1550 lm (typical) with a light output of up to 99 lm/W in standard operation. The new generation of the 15 W modules is specified for a forward voltage of 39 V with a constant current of 400 mA. However, you can also operate the 15 W arrays with increased constant current of up to 440 mA to achieve a luminous flux of up to 1,650 lm. The 48 dies of the Mini Zeni of type GW5BxRxxK05 are divided electronically into a matrix of four parallel-switched series of twelve, which ensures fail-proof operation.
The round shape of the surface emitting light (LES) is also new in the 15 W Mini Zeni arrays. The circular LES has a diameter of 8 mm and is filled up to the edge of 48 LED dies. As a result, the 15 W Mini Zeni modules have properties like a high-performance, point light source, which only requires simple optics (lens and reflector) contrary to multipoint light sources. Nothing has changed in the dimensions of the carrier made of technical ceramics (aluminium oxide AL2O3) of 15 mm by 12 mm by 1.6 mm, so that the new Mini Zeni arrays are completely compatible mechanically with the previous models. The lean dimensions in combination with the small, round LES also provide high design flexibility for the extremely restricted radiation angle of compact lights.
The color temperatures of the new white light LED arrays are in the range from 2,700 to 5,000 K with the shades Natural White, Warm White and Pure White. They are available in two models with CRI values of more than 80 and more than 90. The new Mini Zeni arrays also have high-quality R9 values, two binnings within MacAdam5 as well as good color consistency and stability values over time under realistic conditions (hot lumen). Thanks to the very smooth bottom side of the ceramic carrier and the already existing soldering points, the modules can be attached to an appropriate heat sink without a lot of work, thus ensuring improved heat dissipation. The modules have a lifetime of 40,000 hours at an operating temperature of maximum 90° C. Compared to conventional halogen lamps, the LED arrays from Sharp thus have longer lives The light loss is also considerably less and is only 70 percent after 40,000 operating hours.
Overall, high light quality and high output with a compact shape factor are characteristic for the new 15 W Mini Zenigata LED arrays. Consequently, they are suitable for numerous applications (e.g., spot lighting) as well as for LED retrofit lamps, etc.
Samples are initially available in the colour temperatures 3,000 K and 4,000 K. These can be obtained from Sharp sales offices and distribution partners across Europe.
GLT and ATD Develop High Bay Ceiling Light
Global Lighting Technologies (GLT), Inc. has utilized its advanced LED-based edge lighting technology in conjunction with Advanced Thermal Devices’ (ATD) Loop Heat Pipe heat dissipation technology to develop a new high brightness luminaire for use in high bay recessed ceiling light applications.
The ceiling light, ATD Model # SL-300-C7-NW, offers 17,000 usable lumens at a rated power of 300 W and a color temperature of 4,000 to 5,000 K. Slim and lightweight for a luminaire of its power and performance, it is well suited for a range of indoor applications such as theaters, auditoriums, convention centers, large open office spaces, parking garages and warehouses.
The luminaire measures 600 by 600 by 115 mm (23.6 by 23.6 by 4.5 inches) and weighs 17 Kg (37 lbs.), including adapter, and is waterproof. For illumination, it incorporates a light guide plate (LGP) from GLT edge-lit by high brightness LEDs spaced along the edge of the LGP, which is 5 mm (0.196 inches) thick, contributing to the slim profile, light weight and modularity of this easy-to-install unit.
Heat dissipation is addressed by ATD’s Loop Heat Pipe (LHP), a passive, hermetic closed-loop heat-transfer device requiring no external power input that provides heat transport at distances up to several meters, high power (up to several hundred watts), and utilizes flexible, bendable connecting pipe, maintaining high heat transfer capability in an anti-gravity direction. LHP can circularly transport waste heat and dissipate it to the surrounding environment by natural convection without extra power, effectively solving thermal problems and extending the lifetime of the LEDs.
Lithonia Lighting Launches LED High Bay
Acuity Brands, Inc. has introduced the I-BEAM LED high bay from Lithonia Lighting. This LED solution is the latest addition to the I-BEAM family, the most widely specified high bay family in the industry. The I-BEAM LED luminaire offers higher quality illumination, longer life and consumes less energy than comparable fluorescent and HID fixtures. Plus, I-BEAM LED high bays provide a payback in as little as two years and an impressive return on investment over the life of the product.
Affordable for many high bay applications such as manufacturing, warehousing and other large indoor spaces, I-BEAM LED luminaires can be integrated with factory-installed digital controls such as occupancy sensors, daylight photocells or nLight devices, resulting in increased energy savings. I-BEAM LED high bays come fully capable of dimming down to 10 percent. Additionally, conduction and natural convection technologies used in the I-BEAM LED luminaires maximize cooling, fixture performance and lumens per watt.
“The I-BEAM LED high bay was designed to provide a quick payback and reduce a customer’s total cost of ownership while also delivering the quality and configurability that has made our I-BEAM family so popular,” said Ed Weaver, Acuity Brands Lighting vice president and general manager, Industrial and Emergency, Lithonia Lighting. “This flexible fixture offers numerous options for almost every electrical and optical component, including reflectors, wire guards, emergency battery pack, occupancy sensors, surface mount brackets and more.”
Available for mounting heights ranging from 15 to 40 feet and ambient environments up to 131°F (55°C), the I-BEAM LED high bay meets both horizontal and vertical light level requirements through narrow or wide distributions. Reflectors are precision formed and utilize premium materials including ALANOD MIRO specular aluminum, while an optional semi-diffuse lens provides glare control and LED protection.
"I was pleasantly surprised to discover that the I-BEAM LED luminaire is so lightweight that I can lift it with one hand,” said Richard Wyton, Corporate Lighting consultant with Steiner Electric Company. “This fixture also delivers a very good return on investment. It's so affordable that it can be used as an alternative not only to HID, but to fluorescent as well."
Microsemi Unveils Ultra-fast-startup LED Driver for Linear Lighting Fixtures
Microsemi Corp. has unveiled a dimmable LED driver module optimized for worldwide residential, commercial and industrial light fixtures. The 30 watt LXMG221W-0700030-D0 LED driver enables start up times of 150 milliseconds (ms) or faster, closely emulating the “lights-on” performance of a typical incandescent lamp. This is important for home and business applications where light start-up delays are unacceptable. Microsemi's new Energy Star-compliant, solid state LED driver provides over voltage and current protection, as well as automatic over-temperature shutdown to facilitate reliable and safe operation.
According to estimates from industry analyst firm Strategies Unlimited, the commercial, industrial and residential LED fixture market approached $3 billion in 2011, excluding lamp replacement fixtures. The total LED fixture market is expected to increase at a compound annual revenue growth rate of approximately 20 percent from 2011 to 2016.
"The adoption of regulations imposing a phase-out of inefficient incandescent lamps is driving the growth of alternative light sources including energy-efficient LEDs globally," said Irene Signorino, director of business development at Microsemi. "Our new LED driver allows light fixture manufacturers to capitalize on this growing market opportunity. As always, we remain committed to applying our expertise in lighting and power matters to solving challenging industry issues."
Power-efficient LED lights are becoming increasingly popular for use in homes and businesses alike. However, the energy-savings benefits often don't outweigh the instant-lighting performance that people have come to expect from incandescent lights in such applications. Microsemi's new LED driver solves this issue by delivering a 150ms or shorter startup time that is not noticeable by the human eye. This attribute, coupled with the device's form factor and power/current levels, makes it ideal for use in areas where "instant-on" lighting is required or expected.
Microsemi's new LED driver is compatible with 50 Hz and 60 Hz AC power sources worldwide with standard voltages ranging from 120 VAC ±10 percent to 277 VAC ±10 percent. The output is a 700 milliamps (mA) dimmable constant current source. It complies with UL, CUL, CE and EMC industry standards. The LXMG221W-0700030-D0 is available in production quantities now.
Lumenpulse Challenges Fluorescent Market with Release of Lumenline Linear LED System
Lumenpulse Inc. has released Lumenline, a unique system of indoor linear LED luminaires introducing the benefits of high-quality LED lighting to commercial and institutional environments seeking lower energy and maintenance costs.
Lumenline marks a breakthrough for LED technology, challenging the performance of traditional T5 HO fluorescent systems using a similarly slim 2-inch profile. Lumenline delivers 68 lumens per watt, offers improved photometric distribution, has improved color rendering (85 CRI) and lasts for 100,000 hours (four times longer than fluorescent), making it a durable, high quality energy saver for offices and classrooms.
“Converting to LED has never been this easy,” said François-Xavier Souvay, founder, president and CEO of Lumenpulse. “Lumenline is a complete family toolbox in a slim, clean format that offers flexibility for general lighting applications. It is simple to specify, easy to integrate and offers myriad options.”
Lumenline is designed to be highly configurable, adapting to a wide variety of architectural and commercial building interiors. The system is available in Pendant, Surface Mount and Recessed formats, in single units of 1, 2, 3, 4, 5, 6, 7 or 8 foot or continuous runs, and can be configured with various color temperatures, accessories and optics enabling both indirect and/or direct lighting.
The system has a slim 2-inch profile and a minimal product presence that blends easily into architecture without causing glare or discomfort. Lumenline also integrates with common commercial dimming and control standards such as Triac, ELV, 0-10V, DALI or DMX.
Furthermore, Lumenline is compatible with Lumentalk, a new technology released by Lumenpulse that enables digital control and monitoring over existing electrical wiring, a completely unique feature that eliminates the need for costly data wiring.
GE Debuts LED Bulb that Replaces 100-Watt Incandescent
GE Lighting will has released a LED replacement for the 100-watt incandescent light bulb, developed in its East Cleveland, Ohio, LED lab, that packages 27 watts of input power in a standard "A-19" bulb shape. The GE Energy Smart 27-watt LED bulb incorporates proprietary synthetic jet technology that was enabled by GE's collaboration with ecomagination Challenge winner Nuventix, creator of LED cooling technologies for energy-efficient lighting.
"Our innovation team has tackled a previously insurmountable technical challenge: cooling a 100-watt A-19 shaped replacement LED bulb without making it physically bigger," said Steve Briggs, general manager of LED systems, GE Lighting. "Each subsystem such as optics, electronics and thermals needed to be designed for miniaturization and cooperative performance. We explored the limits of what's possible and pushed far beyond industry expectations and competitors' thinking and product offerings."
GE testing confirms 100-watt incandescent replacement metrics: 1,600+ lumens, uniform omnidirectional light distribution, 3,000 K color temperature, 25,000-hour life rating (22.8 years at 3 hours per day), dimmable, no mercury, instant full brightness and 60+ lumens per watt – all fitting in the standard A-19 bulb shape.
"Our achievement does more than backfill for the 100-watt incandescent bulb," said Briggs. "We now have a clear path to attaining even higher light levels, which will give customers more energy-efficient lighting options in both commercial and residential settings. This product fills a real customer need and further extends GE's LED lighting leadership."
LEDs are semiconductors that produce light. They must be cooled to ensure long life. In collaboration with GE, Nuventix developed a method for moving air to cool LEDs using an oscillating membrane, called a synthetic jet (an alternative to a fan), which fits within the envelope of the A-19 bulb shape.
"We expected our collaboration with GE Lighting would power some big advances in the application of lighting," said Jim Balthazar, CEO and president of Nuventix. "Once we came together last year, our teams wasted no time getting in the lab to build on the genius of GE's LED bulb design, and to incorporate a synthetic jet solution that enabled GE to leapfrog its competitors. We're a leader helping a leader, and it's going to benefit consumers that want high quality LED lighting that performs as promised."
Every GE Energy Smart LED incandescent replacement bulb, including the coming 100-watt replacement, offers smooth, incandescent-like dimming, minus the stepped dimming, flicker, shimmer, pop-on, drop-off or even inaction that plague other LED bulbs touting a dimming capability. GE's LED bulbs also feature an aesthetically pleasing incandescent size and shape, and a design that allows for a soft-white appearance when turned off, a consumer preference that GE discovered through market research.
The 100-watt replacement LED will expand GE's current family of LED bulbs already offered in a broad range of shapes, wattages and colors, including its 40- and 60-watt LED standard incandescent bulb replacements, spot and flood lights (PAR20 & PAR30), ceiling fan bulbs (A15), medium globes (G25), small globes (G16.5), candles (CA10) and night lights (C7). All of GE's Energy Smart LED bulbs are rigorously tested to ensure constant color, long life and verifiable lumen ratings.
Stonehenge Series LED Drivers Exceed Expectations With 100,000 Hour Measured Lifespans
Phihong USA has developed a new series of external AC/DC LED drivers that feature extended lifespans of up to 100,000 hours. The Stonehenge series LED drivers are designed without E-caps, which dry out over time and shorten the operating life of power supplies. A subset of the broader PDA012X series, the Stonehenge series consists of two drivers: the PDA012A-350C-H-R, which is designed for AC inputs of 220 to 277 VAC, and the PDA012B-350C-H-R, which is designed for AC inputs of 100 to 120 VAC. Both 350 mA constant-current drivers operate at an output voltage range of 10 to 43 VDC, and are well suited for applications including display lighting and small strings of high-intensity bulbs.
“Solid-state lighting provides greater energy savings and longer operating lifespans than incandescent or fluorescent lighting; however, most manufacturers cannot provide OEMs with power supplies that can match LEDs’ longevity,” said Keith Hopwood, vice president of marketing for Phihong USA. “The new Stonehenge series, which boasts measured life spans of 100,000 hours, resolves this issue by meeting LED operation benchmarks, cutting energy costs, and lengthening the average amount of time between installation and maintenance or replacement services.”
The Stonehenge series is designed to operate in temperatures ranging from -40°C to 50°C at full power and -40°C to 60°C at reduced output power. Featuring an ingress protection rating of 20, the drivers are rated for dry environments only. Additionally, Stonehenge series drivers come with an extended eight-year warranty, and their small, lightweight design enables easy integration into a variety of indoor and architectural design projects.
Standard features of the Stonehenge series LED lighting power supplies include over-voltage, over-current, short-circuit, and open-circuit protections, including brownout and brownout recovery. The drivers also meet UL8750 and UL1310 requirements, bear safety approval markings for both UL and CE, and meet the specifications outlined by Energy Star for SSL luminaires, including a power factor correction of greater than 0.9.
The other constant-current LED power supplies in the PDA012X series possess the same standard features as the Stonehenge series models, but with lifespans of 50,000 hours. These models are available at a lower cost and come with a standard three-year warranty.
All LED drivers in the PDA012X series, which includes the two Stonehenge series models, measure 132 mm by 30 mm by 22 mm and weigh 150 grams. Pricing for the Stonehenge series models, designated PDA012X-350C-H-R, start at $68.61 in single unit quantities.
Sunpower’s PCC LED Constant Current Power Supply Series Features Triac Dimming
Sunpower UK’s PCC series of RoHS compliant constant current single-output power supplies are designed for indoor LED lighting applications. The series features mains 1 to 100 percent Triac dimming, which is attractive to both installers and users as it eliminates the need for secondary cables and complex dimming systems. This combination of Triac dimming and constant current output has previously been extremely hard to source – and impossible from such attractively-priced, small footprint products. Easy installation with no compatibility issues or concerns is assured as the PCC’s dimming function has been successfully tested as applicable with every known leading- and trailing-edge dimmer.
Installation effort is further reduced by snap lock cable strain relief, and by captive screws which allow easy connection. The PCC series is electrically efficient, and offers a high power factor of 0.9 or better. Units are available with 9 W, 18 W and 36 W ratings. They accept a 220 to 240 VAC input and offer a choice of 350 mA to 1400 mA constant current outputs. The PCC series is short circuit protected, tolerates an overload to 135 percent of rated power and features thermal shutdown for over temperature conditions. The Class ll product design is referred to EN61347-1:2001 and EN61347-2-13:2001 safety standards, and complies with relevant EMC Emissions and Immunity requirements. Cooling is by free air circulation.
The benefits of the PCC series for indoor LED lighting applications have been recently demonstrated by Xicato, an innovative luminaire manufacturer with facilities in the US, the UK and Tokyo. Xicato develops, manufactures and globally markets LED modules that are simple functional replacements for traditional lamp technologies, offering all the life and energy-saving advantages of LEDs with no aesthetic compromises. Xicato’s product lineup includes XSM spotlight modules and XLM linear lights, and they have tested and approved a set of PCC products as suitable drivers for these. As a result, the company has developed a driver compatibility matrix detailing which, and how, PCC, XSM and XLM products can be used together. This matrix is distributed to their OEM customers world-wide.
The PCC Series range of constant current Triac dimming power supplies is well suited for indoor LED lighting applications including residential LED lighting, display cases, LED downlights, LED backlighting, mood lighting and light sculptures.
Intematix ChromaLit Contour Enables LED Replacement of 100-Watt Incandescent Light Bulb
Intematix Corp. has released ChromaLit Contour. Lighting manufacturers can implement ChromaLit Contour to produce 60, 75 and 100 watt-equivalent omni-directional light in an LED system. Intematix also offers A Lamp reference designs for these systems.
Intematix’s ChromaLit remote phosphor can reduce LED costs by 25 percent compared with conventional LED light bulb designs while offering precise color matching and exceptional light quality.
“ChromaLit Contour’s remote phosphor architecture makes available in production for the first time a high performance 100-watt replacement light bulb just as incandescent products are phased out from store shelves, ” said Julian Carey, senior director of Marketing at Intematix. “With ChromaLit remote phosphor we offer our customers time-to-market advantage and lower production costs for LED light bulbs, while enabling high quality light within the constraints of light bulb sizes.”
Contour is the latest in Intematix’s award-winning ChromaLit line of remote phosphor products. This design trend separates the phosphor substrate from the blue LED, instead of coating the LEDs with phosphor directly. Any blue LED may be used which increases flexibility and lowers costs for lighting manufacturers.
ChromaLit Contour’s shape enables internal and external convection airflow to reduce the operating temperature of the LEDs, enabling higher lumen output in constrained form factors. Like the rest of the ChromaLit line, Contour offers glare-free, diffuse light, precision color rendering and color temperature, and consistent light quality. By boosting system efficacy by up to 30 percent, ChromaLit reduces manufacturing costs, energy consumption and total cost of ownership.
Light-Based Technologies Releases LED Driver Offering Unsurpassed Deep Dimming and Compatibility with Widest Range of Triac Dimmers
Light-Based Technologies (LBT) has released its ultra-compatible deep dimming LED Driver. The UC LED Driver is targeted at North American and Japanese lighting fixture manufacturers. Dimmer compatibility is a significant challenge in both retrofit and new build SSL applications because of the wide variation seen in conventional triac dimmers. LBT’s advanced firmware algorithms ensure industry leading compatibility across the entire range of triac dimmers.
“Lighting manufacturers, lighting designers and specifiers have been clear on the need for a single driver solution that was truly capable of working with a wide range of triac dimmers and that would minimize issues during installation. That’s exactly what we’re providing with our UC LED driver,” said Art Aylesworth, CEO at LBT. “Recent field trials have proven that our solution, built on our proprietary IC and firmware platform, allows our customers to meet current dimming and compatibility expectations while allowing for the rapidly changing possibilities in SSL.”
Deep dimming, to 1 percent and below, is very important due to the human eye’s perception of 1 percent power output as 10 percent light output. Specified at 25 W, with a selectable 700 mA or 1,000 mA constant current output, LBT’s UC LED driver delivers unsurpassed deep dimming quality and dimmer compatibility for SSL fixtures. The UC LED driver delivers this deep dimming capability without the flicker and pops associated with other solutions.
The selectable drive currents and corresponding forward voltages are optimized for use with the Xicato XSM line of LED light modules. “The dimming performance and compatibility of the LBT UC LED driver are consistent with the high quality of light the Xicato modules deliver,” said Mark Pugh, Xicato’s president. “We expect that our OEMs will appreciate a driver solution that’s easy to spec and provides great flexibility.”
The UC LED Driver is built on LBT’s proprietary LB4 LED Controller IC and firmware enabled platform. LBT’s firmware approach enables faster and more cost effective integration of increasingly complex features and functionality.
Cree Introduces Industry’s First LED Module Designed to Replace Ceramic Metal Halide Lighting
Cree, Inc. has launched a 2000 and 3000 lumen LMH2 module family and delivers lighting manufacturers a new dome lens and universal driver with dimming options. The new lens enables up to a five percent increase in system efficacy compared to the standard lens and delivers an unrivalled hemispheric light pattern. Cree LMH2 modules enable true 50 watt and 70 watt ceramic metal halide LED replacements and support an expansive range of lighting applications, including downlights, wall sconces, pendants, flush-mounted, spot, track and ceiling fan lights.
The LMH2 module is also now available with a 120 to 277 V universal driver with 0/1-10 volt dimming capability. The extremely versatile and modular LMH2 LED offers a range of lumen, color temperature, driver and beam shape options in one common form factor, enabling lighting manufacturers to customize their applications and speed time-to-market.
“The new LMH2 delivers the perfect combination of high efficacy, color quality and controls,” said Anthony Toniolo, president, DDP and Emerge Lighting. “The Cree LED module provides Data Display the design and manufacturing flexibility needed to accelerate our time-to-market.”
Optimized with the new hemispheric beam shape of the dome lens, the drop-in ready LMH2 delivers up to 80 lumens-per-watt system efficacy combined with 90+ CRI. Featuring Cree TrueWhite Technology, the LMH2 module is available in 2,000 and 3,000 lumens and delivers more than 95 lumens per watt at the light source. The module is available in color temperatures of 2,700 K, 3,000 K, 3,500 K and 4,000 K. Designed for 50,000 hours of operation and dimmable to five percent, the LMH2 comes with a warranty. The LMH2 light source is also UL-recognized and complies with multiple international regulatory and safety standards. Luminaire makers seeking Energy Star qualification will have access to specification and performance data, including LM-80 reports, which can speed regulatory approvals.
“Lighting manufacturers no longer need to settle for inferior quality and performance offered with ceramic metal halide lighting,” said Mike Watson, Cree senior director marketing, LED components. “Cree’s LMH2 family lets designers quickly and easily convert their traditional lighting portfolio to LEDs and simultaneously deliver their end-users improved color quality, efficacy and performance.”