作者：Blade

Algorithm is one of the key technologies of the LED replacement lights

 

Algorithm is one of the key technologies of the LED replacement lights

 

Most LED lighting drive power for its use in the production of transformers, the requirements of the electrical parameters of the inductor is very high, for the sake of precision it takes a lot of manpower and financial resources in order to realize the cost of industrial production is difficult to further decline. Manufacture the Transformer Data Sheet provided by the chip in the drive power transformer standard algorithm, often not very convenient and satisfactory use in the actual circuit applications, the transformer winding process requires a product engineer in the trial and error in the trial, the number of turns of the winding fine-tuning changes in the copper wire taut cable sequence, the core material, etc. will affect the electrical performance of the transformer, thus consuming RD labor and materials demanding, so you must use transformers and inductors increase in the cost of many. Can be passed to break through the constant current source for LED driver chip design technology, innovation and change is what we need to think about new solutions in the practical application of LED replacement lights driver power, the output current of the transformer and inductor inductance and less sensitive to parameters such as the LED replacement lights.

 

Series, led high bay lighting BP310X constant current drive power chips using this new algorithm design, mass-produced chip constant current accuracy can be achieved in less than 3%, the electrical parameters of transformers and inductors have a greater tolerance, greatly sustained, rapid and convenient large-scale industrial production costs and pipeline production, real topological structure design system design & algorithm design, circuit design, layout design layout the Foundry flow-chip electrical parameters of transformers, inductors, is not sensitive.

A brief description of LED lighting chips design process

 

A brief description of LED lighting chips design process

 

2011 is the year of the rapid development of led high bay lighting industry, governments around the world promote to promote the vigorous development. The world today need to use lighting each year 12 billion, the largest consumption of electrical products.

 

Recently, the phosphor bizarre sharp price increases, resulting in the increase in the cost of fluorescent lamps; LED lighting chips manufacturing technology development strides to promote its rapid decline in the cost of the end of the year to next year Q2 estimates a maximum decrease of 30-50%; nuclear power in Japan after the earthquake making the post-earthquake reconstruction of the market demand for LED lighting to grow rapidly.

 

Drive power LED lighting chips, most of simulation technology, but also the design of digital technology. Power analog integrated circuit design including: topology design, algorithm design, logic design, circuit design, layout design, involving a wide range of workload is complicated, you must use the science of computer hardware and software tools to accelerate the design cycle. The topology design is the definition developed by the chip set, the rest are of service to achieve this purpose. Topology design technology is relatively mature, the AC / DC LED driver chip, the most used topology is the Fly-back (isolation), Buck-Boost, Buck (non-isolated); “control mode” voltage type and current type; working model “of the CCM (continuous mode), DCM (discontinuous mode), BCM / CRM (critical mode), the PFM (Pulse Width modulation).

 

Algorithm design of the analog power chips “is part of the chip in the system design. The core part of the system definition is to implement this algorithm. Of course, include other special features and basic functions.

 

led track lighting fixtures are sold out in Japan

led track lighting fixtures are sold out in Japan

Since the earthquake in Japan, more and more Chinese led track lighting fixtures companies start the marketing in Janpan, by the methods of the cooperation with the LED chips factories like Nichia, Sharp, etc.

According to the local statistics, in 2011, more than 31 million of led bulbs are sold in Japan, this quantity is 40% higher than 2010.  Japan’s major appliance stores have also opened up a sales area of the LED lights.

As the quick development of Japan market, more and more led track lighting fixtures companies focus this country.

All the led products sold to Japan have to pass PSE. After we talked the chief engineer of Eneltec, the top LED High Bay company, PSE is not only request for  strict product quality, but also production technology, detection, the product lines would be inspected every 3 months.

Panasonic claim to strive for year 2012 achieved sales of 35 billion yen, with 25 billion yen in Japan and overseas for 10 billion yen. 2015 annual sales will reach 100 billion yen, of which, LED lighting will account for 40% market share in mainland Japan.

Also, Toshiba is stepping up its penetration of the Japanese LED bulb market. Toshiba’s Director and Chief Minister Sato Koji, said, in 2011,  the annual growth rate of over 300%. In early February this year, Toshibalaunched two LED bulbs.

Now, more and more companies from Japan are looking for good manufacturers in China. Eneltec sell all the  led track lighting fixtures to Japan Market through 28 agents in differents cities of Japan. Find the correct way to do the cooperation, then we would get succeed in the market.

Algorithm design of innovative LED constant current driver

 

Algorithm design of innovative LED constant current driver

 

At present, governments continue to strengthen efforts to phase-out incandescent, for example, the European regulations in 2009 ban by the end of the 100W incandescent, 75W incandescent ban by the end of 2010. In early August 2011, the National Development and Reform Commission promulgated the “phasing out incandescent roadmap (draft),” clear “road map”, from October 1, 2012, prohibit the sale of 100 watts and more general lighting using incandescent to prohibit the sale of 60 watts and general lighting with incandescent light; October 1, 2014; October 1, 2016, to prohibit the sale and import of general lighting of 15 watts and above with an incandescent lamp. This undoubtedly is a great opportunity to give LED constant current driver. Along with the drive power led high bay lighting constant current control technologies and LED light source prices continue to lower, the distance of the LED lighting into millions of households and further narrow.

 

Specially designed for LED constant current driver constant current drive power chip, has been mass production and application. These chips are highly integrated LED lighting constant current power supply required for the various functions, making the chip applications continue to simplify the external control circuit, the main stage side of the current technology (PSR) has been maturing; continuously improve the current precision of the chip, to reduce production deviations, to enhance the reliability of power supply mass-produced to provide effective protection; the emergence and maturity of the technology of LED lighting for single-stage multi-function control chip, makes the further decline of the power supply size and cost, better adapted to the narrow space lighting.

Constant current driver is no longer suitable for blue LED replacement light

 

Constant current driver is no longer suitable for blue LED replacement light

 

In a standard shell, the bottom of the aluminum base board heat close mount blue LED replacement light panels, and the ring of the PCB is a constant current drive power, the power cord can be directly connected to the AC. The blue LED light engine also has the internal temperature of the light engine intelligent control functions, built-in temperature sensor, and protected within the light engine to achieve set temperature (75-80 º C). Start movement of the temperature control circuit, the output current decreased speed of 1/256 order, until the lamp temperature down to set under the protection of temperature, the output current back to normal. To protect the life of the LED light source and drive power the purpose of life. Constant current drive power to the full-voltage design, AC90-260V wide voltage range input, power factor hormone (PFC)> 0.9, the efficiency of 80-85%, color temperature 2700-3000K,5000-6000K, CRI> 80.

 

If the color temperature and CRI requirements, can be custom designed. And dimming tone light two kinds to choose from nether lands imported project in the outside cover of the bottom of the aluminum heat sink thermal conductivity of plastic film, and strengthen the heat conduction. Outside ministry of radiator through the aluminum heat sink to the bottom of the three screw holes for easy locking. Figure 8 is the blue LED replacement light lead engine series products. To ensure the quality of yellow phosphorus fluorescence filter all U.S. imports.

 

Traditional lighting plant and the new entry, LED lighting companies, you can easily use this Blue-ray LED replacement light engine for led high bay lights, Ceiling LED lighting products. Blue LED light lead the engine will be mass application in the commercial lighting and interior lighting, LED lamps, the market outlook is very optimistic.

The long term degeneration of white LED light engine

 

The long term degeneration of white LED light engine

 

Traditional white LED light engine is directly coated with yellow phosphorus phosphors on a blue LED, white LED lit, the heat is difficult to distribute, yellow phosphorus phosphors in the long-term high temperature BBQ is easy to degeneration, resulting in significant use for a long time after color index variation. LED lamps, such as yellow phosphorus phosphor directly coated white LED light engine, but filter made ​​of a yellow phosphorus, to maintain a certain distance with the blue LED in the fixture, the two superimposed using the same samples can be obtained white or warm white light of the LED lighting effects. The yellow phosphorus filter away from the LED heat, therefore, aging degeneration due to the LED light source of long-term high-temperature grill, CRI is essentially the same; yellow phosphorus filter with side adjustable, lighting, color, color temperature with the modulation of the needs of customers, which can meet the customized requirements and poor production alienation of the product.

 

The blue LED light engine architecture is an innovative concept, completely different from the aforementioned white LED light engine. Blue LED light engine will be the blue LED light source plate, the AC / DC constant current drive power board. The yellow phosphorus filter is integrated in one. Its structure principle shown in Figure 5, the mains via the AC / DC constant current drive power transform the output constant-current DC lit blue led high bay light source, blue, yellow phosphorus filter to the LED light the engine makes white or warm white.

ZHAGA union in LED street lighting projects entered Chinese market

 

ZHAGA union in LED street lighting projects entered Chinese market

 

Dreams can come true!, LED lighting, LED light source and the AC / DC constant current drive power integration module —- LED light engine has been born, and can be mass-produced. LED lighting enterprise, traditional lighting plant and the new entry can be very convenient LED light engine for the mass production of the new LED lighting, thereby speeding up new product design to volume production process, greatly reducing the development cycle of new products . The LED lighting market calls for the LED street lighting projects early birth, and entered the lighting market as soon as possible.

 

Today, a challenge for LED street lighting projects designer and user, the light source drive circuit between no standardized interfaces. European ZHAGA Alliance launched an industry-wide action for the LED light engine development standards to regulate. The LED light engine with the provisions of the interface LED modules, and these interfaces has nothing to do with the type of internal use of the LED light engine technology. In fact, in early February 2010, Cooper, Lighting, Osram, Panasonic, Philips, Toshiba, including nine of the lighting industry giant announced that it will initiate the establishment of a Cooperation Organization — ZHAGA associated Union, are participating members of 25 companies.

 

The ZHAGA Union aimed at developing the led high bay light engine (light engine) interface interface standards so that different. The manufacturers of the products are interchangeable. To cope with the sustained and rapid development of LED technology, by defining a variety of special light engine interface information, ZHAGA, the standard will cover physical size, and LED light cited the engine of the optical, electrical and thermal performance, and ultimately ZHAGA alliance between different manufacturers products compatibility, interchangeability.

Led lamp china has become a major trend of the future energy-efficient lighting

Led lamp china has become a major trend of the future energy-efficient lighting

“LED lighting industry, is a revolution, not just a substitute for traditional light sources. Toshiba Lighting to reach the common aspiration is to better play out of the features of LED products, making this the revolution of the lighting industry to more thoroughly and more rapidly. “America’s Minister of Ministry of lighting, led lamp china,commercial lighting project segment says.
Beautiful lighting and Toshiba success “in hand”, follow-up development planning has also become the focus of widespread concern by the industry. In this regard, the lighting commercial lighting project, Minister of paragraph spring, said: “The first step in the lighting of the United States and Toshiba strategic cooperation, first of all will be reflected in industrial design. New LED products will be a large number of applications mature Toshiba LED module Second, the amount of advantage in industrial design, led high bay combined with America, as well as large-scale manufacturing and channel advantages, and strive to provide the market with excellent cost LED products, and promote energy-saving replacement of the lighting industry. electrically, the two sides in the LED driveintelligent control, led lamp china, intelligent dimming more in-depth cooperation. ”
It is understood that during the period in the United States signed a strategic agreement with Toshiba, beautiful lighting, market-oriented heavy launched a 60-variety of business according to new LED products include LED ceiling spotlights and LED downlight. The bewildering variety of these LED tube lighting, with the flexibility to choose a variety of colors and materials, the light source deep adjustable, easy to install, led lamp china,to fully meet the workplace needs of engineering a variety of applications of the commercial channels.With electrical sales, a direct replacement for ordinary ceiling spotlights, is also very suitable for the home to promote the use of the professional market.
Beauty lighting the future development prospects, the Lisan Long said: “to create a new era of lighting industry in China, and lighting in the United States to achieve the grand vision of the overall world-class lighting solutions provider, to make a difference in international and domestic markets.”

LED household lighting market calls for the LED light engine

LED lighting design variety prevails, the inconvenience to the production, use, and industrial management, in particular the transition from traditional lighting plant to the LED lighting plant, or just entering the initial of the LED household lighting industry, will feel overwhelmed, where to start as well? Just enter the LED lighting industry, in order to reduce the risk and cost, often only to buy off-the-shelf LED lights source lamp board, AC / DC constant current drive power, aluminum or ceramic such as the radiator assembly. Traditional lighting plant owners as effort as well buy a light bulb, buy a ready-made “LED Street light + AC / DC constant current drive power” module into its traditional lamp housing can be magnificent turn as a the new LED lighting.

LED household lighting market calls for the LED light engine

 

The rapid development of LED lighting, a mighty force competing to join the new company was born in the world almost every day, especially the interior lighting of the mass market, forcing traditional lighting companies to tap into joining. LED household lighting is an electronic product, it requires not only such traditional lamps that structure, the shell must also be given a variety of string, and parallel matrix LED light source lamp board, AC / DC constant current drive power, aluminum or ceramic, etc. heat , led high bay lighting market calls for the LED light engine lighting manufacturers need to employ electronic, optical, structural design engineer; traditional lighting is only one electrical products, traditional lighting manufacturers design, structural modeling of the production of lamps, the light source —- bulb bought to the professional factory plug will be able to use universal.

 

How to predict the life of the LED bathroom downlights

 

How to predict the life of the LED bathroom downlights

 

From the junction temperature to speculate that life seems to be very simple, just check the graph in Figure 1, you can know that life for the junction temperature of 95 degrees you can get the LED life of 20,000 hours. However, this method is used for indoor LED bathroom downlights have a certain amount of credibility, if applied to the outdoor LED lamps, especially high-power LED lights, where there are many uncertainties. The biggest problem is the radiator cooling efficiency of led high bay lights is reduced over time. This is due to the accumulation of dust, bird feces makes its cooling efficiency. Also very strong because the outdoor ultraviolet rays also cause reduced life of the LED. UV is mainly the aging of the epoxy resin package play a big role, if the use of silicone, can be improved. There are some bad effects of UV on the aging of the phosphors, but not very serious.

 

Two voltage temperature to remove, you can get the temperature coefficient, expressed in mV / oC. For ordinary silicon diode, the temperature coefficient of about -2mV/oC. LED bathroom downlights most are not made ​​of silicon, so its temperature coefficient should another go determination. Fortunately, various LED manufacturers data sheets, most of its temperature coefficient.

 

However, this method is used to relatively compare the two radiator cooling effect is more effective. Obviously, the volt-ampere characteristic left the smaller radiator, the heat the better. In addition, the life prediction of indoor LED bathroom downlights still have a certain degree of accuracy.