key design issues of LED lighting lamps

To design products, we must first determine who's using led high bay lighting wholesale structure; next consider how to adapt to these packages; few opportunities by our choice, the optical structure is built on these packages; many of us can not be a good idea to play .
First, the semiconductor lighting applications Problems
1, heat
2, the lack of standards, products mixed
3, there is a price and design quality problems, and ultimately consumers choose LED lighting, lack of confidence
4, semiconductor lighting in electrical design are very different with the traditional lighting, traditional lighting companies need experience / skill accumulation process
5, we are optimistic about the market, but the amount has not been on the scale
Features:
1, by adjusting the precision constant current chip to ensure LED brightness, color consistency, the module provides a standard level for downstream customers, customized, reliable, high-quality products;
2, the old and new lighting design manufacturers, not too complicated electrical design, just add simple circuit design traditional constant power supply to work outside, is the fastest and most reliable way;
3, to solve large-scale LED lighting market on the quantity and quality of technical problems.
Second, the thermal design
1, the shortest thermal conduction path, reduce the heat transfer resistance;
2, increasing the heat transfer area to each other, increasing the heat transfer rate;
3, reasonable computational design cooling area;
4, effective use of the heat capacity effect.
Output drive voltage options:
Within 20W 48V mains driven around more appropriate;
Greater power mains output voltage of about 36V drive the most appropriate;
Most off-the lighting is 12V and 24V voltage.
Features:
Based on a series-parallel load the appropriate safety considerations driving voltage, the voltage value is reduced as much as possible unified cost power supply design specifications;
Based on safety regulations, product design to meet the certification requirements, the flow does not exceed the peak or DC over voltage 60Vdc 42.4Vac of;
From solve large-scale LED lighting market on the amount of technology and quality problems.
Third, the most efficient way to back-end drive
When the output voltage of about 48V, low dropout linear constant current devices constant efficiency up to 99%, ± 3% or less constant precision, 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%, within current precision ± 3%, without any external effects device; even in the off-line lighting parts, low voltage 12V and 24V, respectively 96% and 98% efficiency; power size efficiency is equal.
Features: The most efficient drive constant current architecture; the most accurate constant current mode, by the peripheral device; simple, convenient and practical.
Four, constant current power consumption has reached negligibly
CYT company laboratory in Shenzhen, we have verified the efficiency of 99.99375% constant back-end, to the point where you can completely ignore;
Next time we complete this year with a design achievement, more than 10 people IC design team and a strong power supply manufacturers, will accomplish this goal as quickly as possible.
Five, AC-DC design
Switching power supply to the outcome of today's development is accumulated over the years, the short-term direct AC-DC Constant Current unbreakable; constant voltage and constant 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 proportional.
Features:
To rational use of existing resources, the switching power supply is the most economical;
Constant voltage and current technologies is inevitable;
Technically innovative products in a stable is valid.
Six, LED combination of the package is the future trend
Composite design module can effectively reduce the cost of disposable packaging; scattered package in favor of reducing the cost of thermal design; choose domestic aluminum PCB sheet; easy optical design; simplify power supply design; packaging forms; beneficial to enhance competitiveness of domestic LED force!
Seven, package structure 'kidnapped' design of our optical effects
This is CREE, Nichia, Lumileds, OSRAM representative of several packages. To design products, we must first determine who's using LED packaging structure; next consider how to adapt to these packages; the few opportunities we have chosen, the optical structure is built on these packages; many of us can not be a good idea to play .
Lighting design is changing, and how we can get out of this situation?
Eight, modular packaging technology combined with the constant
Design Power LED constant current technology and infrastructure to integrate light parameters on the product;; PCB board and LED packaging design, easy to achieve low cost; our heads, can develop different types of packages in the form of effective coping changing, ever-changing LED lighting needs; power supply section, using only conventional switching constant current power supply; improve product delivery speed, lighting design simple and practical, greatly reduce the cost; you can also avoid the forefront of LED packaging patent containment.
Nine, according to the voltage nominal value package
LED constant current drive innovative technologies in Shenzhen CYT was born, I named it "power LED constant current integrated package" technology, referred to as "module package"; this technology is directly integrated on the basis of LED packaging technology with high accuracy, low dropout linear constant streaming technology; after 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 emitting source
Break the original design products according to sources, in turn, according to product customization package LED light source; the maximum with product ideas show; optical package structure for product design; low cost; and product design combined with thermal structure, reducing the thermal resistance; high precision constant current; with integrated protection functions. Shenzhen CYT LED laboratory company can quickly help you complete the product design.
XI, the advantages of modular light
① effectively reduce costs:
Reduce the number of packages, cost-saving package;
With the environment, production conditions improve consistency and improve yield;
Optical design to reduce costs;
Lower thermal design costs;
Batch mixed package, reducing the cost of sub-file;
Products designed to simplify and reduce the overall cost;
Cheap package architecture. This technology, LED lighting industry will guide the healthy direction.
② reduce thermal resistance:
Light source with direct binding radiator shell;
PCB to avoid a hot media;
Reduce chip-to-case thermal path;
New heat transfer technology; most effectively reduce the thermal resistance, thermal design problem solving.
③ constant high accuracy:
Consider the value of unity within the module Vf;
Constant current source by little outside influence;
Linear high technology is mature, there is no external components affect the accuracy;
No EMI interference affect the accuracy;
Multiple parallel independent does not affect the accuracy;
From power fluctuations load current precision. Highest precision constant current framework for led high bay light supplier consistency and longevity optimized design architecture.
④ protection integrated design:
Built-in temperature protection;
Internal power supply and protection technology;
Built-in high grayscale interface;
Short circuit and open circuit protection;
You can set the linkage protection;
ESD protection.
Any other built-in features, protection needs can be explored.
⑤ take the traditional supply road:
This is a sound first step; optional strong; cost is the most favorable; switching power supply indicators are not achieved, LED power supply can also be achieved, to solve practical problems, detours; even if the strength of the company's design, LED section it takes time to verify; no electromagnetic compatibility issues. Mature power takes time, and some of the publicity about the LED power rush you believe that? First constant, then the linear constant current, must be the future mainstream market LED lighting drive mode!