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To design products, we must first determine who used the LED package structure; next consider how to adapt to these packages; by the few opportunities we have chosen, the optical structure is built on top of these packages; many of our ideas are not well play . Analysis of key issues and LED lighting design process described below.
First, the semiconductor lighting applications Problems
1, heat
2, lack of standards, mixed products
3, there is a price and design quality problems, and ultimately consumer choice LED lighting, lack of confidence
4, semiconductor lighting in electrical design are very different with the traditional lighting, traditional lighting companies need experience / skills-building process
5, we are optimistic about the market, but not yet on the scale of the amount of
Features:
1, by adjusting the precision constant current chip, ensuring LED brightness, color consistency, the module provides a standard level for the downstream customers, customized, reliable, high-quality products;
2, the old and new lighting design manufacturers, do not be too complex electrical design, just add simple conventional constant voltage power supply circuit design can work on the outside, it is the fastest and most reliable way;
3, to solve large-scale LED lighting market on the amount of technical and quality problems.
Second, the thermal design
1, the shortest path to spread heat, reduce the heat transfer resistance;
2, increasing the mutual transfer area, increase heat to speed;
3, a reasonable computational design heat dissipation area;
4, the effective utilization of the thermal capacity of the effect.
Output drive voltage options:
Within 1,20W 48V mains driven around more appropriate;
2, the larger the power mains voltage of about 36V output driving the most appropriate;
3, most of which are off-line lighting 12V and 24V voltage.
Features:
1, based on a series-parallel security load the appropriate driver voltage, the voltage value is reduced as much as possible unified power supply design specification costs;
2, based on safety regulations, product design to meet the certification requirements, the peak flow over 42.4Vac or DC over voltage of 60Vdc;
3, LED lighting market from solving large-scale quantity and quality of technical issues to consider.
Third, the most efficient way to drive the rear end
When the output voltage of about 48V, low dropout linear constant current constant current device efficiency up to 99%, ± 3% precision constant current, without any external effects device; when the output voltage of about 36V, the low dropout linear constant current devices constant efficiency up to 98.6%, constant current accuracy within ± 3%, without any external effects device; even in the off-line lighting parts, low voltage 12V and 24V, respectively 96% and 98% efficiency; power level equal efficiency.
Features: The most efficient drive constant current architecture; the most accurate constant current mode by peripheral devices; simple, convenient and practical.
Fourth, the constant current power consumption has reached negligible levels
Shenzhen CYT company laboratory, we have verified to the rear end of the constant-current efficiency 99.99375%, to completely ignore the point;
We next year to complete the design achievement, more than 10 people IC design team and a strong power supply manufacturers, we will accomplish this goal as quickly as possible.
Five, AC-DC design
Switching power supply development today is the result of many years of accumulation of short-term direct AC-DC constant current unbreakable; Constant voltage and current relationship spear and shield, must be considered separately; constant current source load regulation is 1% (mA ) / V, reach constant effect; the more ideas, the higher the cost, and risk is proportional.
Features:
1, to a reasonable use of the existing resources of the switching power supply is the most economical;
2, constant voltage and constant current technologies is inevitable;
3, stable product is technically innovative and effective.
Six, LED combination of the package is the future trend
Composite design module can effectively reduce the cost of disposable packaging; dispersed packages in favor of lower cost thermal design; choose domestic aluminum PCB material; ease of optical design; simplified power supply design; packaging forms; advantageously enhance competition in the domestic LED force. !
Seven, packaging structure 'kidnapped' our design optical effect
This is CREE, Nichia, Lumileds, OSRAM representative of several packages. To design products, we must first determine who used the LED package structure; next consider how to adapt to these packages; by the few opportunities we have chosen, the optical structure is built on top of these packages; many of our ideas are not well play .
Lighting design is changing, and how we can get out of this situation?
Eight modular packaging technology combined with constant current
PCB board level design LED package, easy to implement and low cost; our heads, can develop different types of packages; design products based integrated power LED constant current technology and light distribution on the parameters; effective response rapidly, the ever-changing LED lamps need; power supply section, using only existing conventional switching constant voltage power supply; improve product delivery speed, lighting design simple and practical, greatly reduce the cost; the forefront of the LED package can also avoid the patent containment.
Nine, according to the nominal voltage value package
LED constant current drive technology innovation in Shenzhen CYT born, I named it "constant power LED integrated packaging" technology, referred to as "module package"; this technology is directly integrated LED packaging technology based on high-precision low dropout linear constant streaming technology; later LED nominal voltage specifications can occur, for example: 12V / 1W, 24V / 1W, 36V / 1W, 48V / 1W, 12V / 3W, 24V / 2W ...... 36V / 10W and so on. Later, customers CYT technology product design, eliminating the need to consider any question about LED constant current, constant use of the existing standard power supply can be. This technology will be declared "LED constant current power supply," said one end!
Ten, according to product design light source
Break the original design products according to sources, in turn, according to product customization LED light package; maximizing product innovation with the show; depending on the product design of the optical package structure; low cost; and product design combined with thermal structure, reducing resistance; high precision constant current; protection with one. Shenzhen CYT company LED lab can quickly help you complete the product design.
XI, modular light source advantages ① effectively reduce costs
1, to reduce the number of packaging, packaging cost savings;
2, with the environment, production conditions improve consistency and improve yield;
3, the optical design to reduce costs;
4, lower thermal design costs;
5, Batch mixing package, reducing the cost of sub-file;
6, simplified product design, reduce overall costs;
7, low packet architecture. This technology, will guide the LED lighting industry, the healthy direction.
Twelve, modular light source advantage ② reduce thermal resistance
1, the light source directly bonded to the heat sink with the housing;
2, to avoid the PCB as a heat medium;
3, to reduce chip-to-case thermal path;
4, the use of heat to the new technology; most effectively reduce the thermal resistance, thermal design to solve the problem.
XIII, modular high precision constant current source advantages ③
1, unified consideration Vf value within the module;
2, the constant current source by small outside influence;
3, linear high technology is mature, there is no peripheral devices affect the accuracy;
4, no EMI interference problems affect the accuracy;
5, multiple parallel independent of each other without affecting accuracy;
6, independent of supply fluctuations load current precision. Highest precision constant current architecture, the LED brightness uniformity and lifetime optimized design architecture.
Fourth, the advantages of modular light ④ protection integrated design
1, built-in temperature protection;
2, the internal power supply and protection technology;
3, built-in high gray Interface;
4, short circuit and open circuit protection;
5, the linkage may be provided protection;
6, ESD protection.
Any other built-in features, protection needs can be explored.
Fifth, the advantages of modular light ⑤ follow the traditional path of power
This is a solid first step; optional strong; cost is the most favorable; switching power supply can not be achieved indicators, LED power supply is also too difficult to achieve, detours; even if the strength of the company design, LED part takes time verification; no electromagnetic compatibility issues. Mature takes time power, the power LED on some propaganda catch you believe it? First constant voltage, constant current linear then, must be the future mainstream market LED lighting drive mode!
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