作者：Blade

The basic structure and key technologies for high voltage LED lighting

 

The basic structure and key technologies for high voltage LED lighting

 

The high voltage LED lighting and generally the LV LED has three in the technically most important difference, the first open trench (Trench), the purpose of the grooves is N pieces of small units of the PN junction independently from its groove below need to substrate, the depth depending on the epitaxial structure varies, generally about 4 ~ 8um,, the width of the groove aspect although some restrictions, but the groove is too wide to represent the reduction of the effective light emitting region, will affect the luminous efficiency of the high voltage LED lighting need to develop a high aspect ratio process technology, narrowing the line width of the process in order to increase the luminescence efficiency.

The second is a small unit PN crystallization inter-chip interconnect wires (Interconnect). In general, a good link to do a wire jumper requires a relatively flat surface, a deep ladder-like structure will allow the wire structure is weak and prone to damage under high voltage, high current drive, causing the chip failure, so the development of the planarization process becomes very important. The ideal state is to do the insulation layer, the one and deep trench to be flat and interconnection wires can be smoothly connected. In addition, the high voltage LED lighting and low pressure the LV led high bay lighting main difference in the application as it not only can be used in the circuit of constant current (Constant DC) system, can also be an external bridge rectifier, to be applied directly to the exchange environment, very flexibility.

The module principle for high voltage LED lighting

 

The module principle for high voltage LED lighting

 

In recent years the rapid development of high voltage LED lighting, in particular, landscape lighting, Beijing Olympics, Shanghai World Expo, a large number of applications of LED lighting, the aesthetic of the electro-optical unprecedented shock the senses of the world and popularization of energy-saving LED lighting, LED lighting in the world. Efficient, long life, environmentally friendly concept deeply rooted. Also high due to the cost of LED lighting, LED lamps and fluorescent energy-saving lamp market share of about 5% and 95%, LED lighting into millions of households to take up to 3-5 years.

 

The successful production of high-voltage high voltage LED lighting source for LED lighting has opened a new horizon, creating a new world. High-voltage LEDs module light source (HV LEDs), forward voltage VF compared LV led high bay hypertension, can be artificially controlled design in the production, the HV the LEDs on the same chip modules, which have been completed in the production PN junction on-chip series, the entire module VF, can be designed to 25V, 35V, 45V, 50V… 270V/DC, the LV LED ten times, several times. Positive operating voltage IF = 20mA, compared with LV LED 350-700mA operating current is reduced by one hundred times, therefore greatly reduce the HVLEDs heat, basically the high voltage LED lighting heat dissipation of the LV bottleneck, significantly reduce the use of the cooling aluminum. System circuit does not require a dedicated AC / DC switching constant current source, effectively reducing power consumption and cost.

 

LED industry to usher in the development of led high beam lights

LED industry to usher in the development of led high beam lights

Although the development of LED industry in Jiangmen into a period of rapid growth, but also faces many challenges. From the second quarter of 2011, the LED industry as a whole supply exceeds demand, supply and demand gap of 30%. International e-commerce platform based on the global market forecast: in 2011, Chinese exports of traditional markets in Europe and America total growth of about 10%. Under the influence of the European debt crisis, in 2012, the traditional export markets in Europe and America will be more stable, affected by the decline of purchasing power abroad, led high beam lights, can not be optimistic about the market demand in Europe and America. Under this economic environment, Jiangmen LED industry is an urgent need for transformation, Panjian Yue, general manager of global market operations, said: “In addition to improving product quality, application of new technologies in response to cost pressures, led high bay more importantly, the enterprises ‘group to hold’ to create Jiangmen LED industry group brands, improve the capability of independent innovation, to master the core technology, to respond to changing market conditions in Europe and America. ”
It is worth mentioning that the GMC International Buyer the Jiangmen station “invited many European and American international buyers to attend, led high beam lights, including Schneider, Bedford China, Germany Osram Long and other top international brands, as well as from Argentina, the United Kingdom professional lighting and the Middle East buyers, site procurement negotiations and GMC quality manufacturing and commercial enterprises, a number of buyers have expressed their intent to purchase, and achieved a remarkable success. Procurement site and as a relevant person in charge of one of the organizers of Jiangmen Bureau of Foreign Trade attended the speech, led high beam lights, the procurement will be given a high rating.
LED market to expand rapidly, attracting more and more companies have joined the ranks of the LED industry, which was mixed, good and bad product quality.

The high-voltage LED lights will lead the future lighting market

 

The high-voltage LED lights will lead the future lighting market

 

LED lighting mostly use low-voltage LED light source (LV LEDs), low forward voltage VF was 3.2 ± 0.2V, the forward current, IF, nominal current 350mA/1W or 700mA/3W. Therefore, the switching constant current source, the resulting system circuit power factor loss, increase in system circuit ripple; traditional lamp left us very little room, the drive power of the LED light source is difficult to do well in small spaces ; LED lighting must be attached AC to DC (AC / DC) power conversion systems, the rectifier large buck to high-voltage LED lights source power supply, power loss, the overall power efficiency is difficult to improved; system circuit transformer coupled and resistance accuracy error, and the driver IC with degrees tend to make the transformer manufacturing parameters with the theoretical values ​​vary greatly; removal of the drive power supply ripple and electrical energy storage aluminum electrolytic capacitors, low life expectancy of aluminum electrolytic capacitors became difficult to go beyond the divide of the long life of LED lamps; High-voltage LED lights beads cooling function, conduction-cooled, must use a radiator, limited due to space and cooling difficulties, the whole lamp LED cooling is still a huge bottlenecks; LED light bead, poor heat dissipation, and not timely will result in the LED light bead early light fades; use heat sink will increase the cost of led high bay lighting and its own weight. . . Although the difficulties of that sort of LED lighting design engineers in efforts to improve, but the pursuit of excellent product performance and product cost control has been in a dilemma.

The optimization algorithm makes blue-ray LED applications simple

 

The optimization algorithm makes blue-ray LED applications simple

 

Most of the driving power of the blue-ray LED applications in its use in the production of transformers, inductors, electrical parameters of the requirements of ten high demand precise takes a lot of manpower and financial resources in order to achieve the cost of industrial production is difficult to decline further. Innovation and optimization of the chip algorithm so that the led high bay lights output current accuracy is not sensitive to the periphery of transformers, inductors and other electrical parameters, and reduce the manufacturing costs of the inductors, transformers and LED the whole lamp.

 

BP310X this innovation to optimize the chip algorithm, the application circuit is very simple, few parts around, in line with the concept of low cost, and industrial production. Figure 3 is a typical application circuit, the main stage side of the constant current, the secondary feedback circuit is no longer an obstacle on the power supply size and cost a great convenience, so that the power supply volume to the most demanding occasions, such as Bulb, GU10 spotlights. Traditional optocoupler feedback structure there is the aging of the optocoupler and very safety test within the Light Bulb 60-90 º C ambient temperature, the reliability issues become the focus of attention of the manufacturers and customers. The main stage side of the constant current technology matures, innovation-driven power chip algorithm, the design of new technologies, making the application circuit to become insensitive to certain difficult quality control parameters of transformers and inductors, blue-ray LED applications power and lighting manufacturers that can facilitate improve product performance and lower costs is a win-win choice.

 

 

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.