LED Lighting analysis of all the key issues in the design process

To design products, we must first determine who LED packaging 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 creative play . Here are the key issues and analysis of LED highbay light design process.

A problem exists in the semiconductor lighting applications

1, heat

2, the lack of a standard, mixed products

3, there is the price and quality of design issues, and ultimately consumers choose LED lighting, lack of confidence

4, semiconductor lighting in the area of ​​electrical design with the traditional lighting are very different from the traditional lighting companies need experience / skills accumulation process

5, we are optimistic about the market, but not yet on the amount of scale

Features:

1, by adjusting the precision constant current chips, to ensure the LED brightness, color consistency, the module is a standard for downstream customers, customized, reliable high-quality products;

2, old and new lighting design manufacturers, do not be too complex electrical design, simply external with a concise line design traditional constant voltage power supply to work, is the fastest and most reliable way;

3, to solve the LED highbay light market in a large scale on the amount of technology and quality issues.

Second, the thermal design

1, the shortest path heat to decrease the thermal conduction resistance;

2, increasing the mutual transfer area, increase the heat to speed;

3, a reasonable calculation designed cooling area;

4, the effective use of the effect of the heat capacity.

Output drive voltage selector:

Mains driven less than 1,20 W 48V is more appropriate;

2, the larger the power mains driver output voltage of about 36V most appropriate;

3, most of the off-line lighting voltage of 12V and 24V.

Features:

1, based on the series and parallel security considerations load the appropriate driver voltage value, unified voltage values ​​as much as possible to reduce the cost of power supply design specifications;

2, based on safety regulations, product design to meet the certification requirements flow peak more than 60Vdc voltage the more than 42.4Vac or DC;

3 from to solve LED lighting market large-scale on the amount of technology and quality issues to consider.

Back-end drive way for the highest efficiency

When the output voltage of about 48V, low dropout linear constant current the device constant current efficiency of up to 99%, constant-current accuracy within ± 3%, without any peripheral devices affect; when the output voltage of about 36V low dropout linear constant flow the device constant current efficiency up to 98.6%, the constant current accuracy within ± 3%, without any peripheral devices; Even offline lighting part, the low voltage of 12V and 24V, respectively, 96% and 98% efficiency; The power the size efficiency are equal.

Characteristics: the most efficient drive constant current architecture; precision constant current peripheral devices with minimal impact; simple, convenient and practical.

Fourth, the constant current power consumed has reached the extent that can be ignored

In the Shenzhen CYT company laboratory, we have verified the backend constant current efficiency of 99.99375%, to completely ignored the point;

We have one year to complete the design achievements, future IC design team of a dozen people and strong power supply manufacturers, this goal will be completed as soon as possible.

Five, AC-DC design

Switching power development to today is the result of years of accumulated short-term AC-DC Direct constant current unbreakable; constant voltage and constant current relationship between spear and shield, must be considered separately; constant current source load adjustment rate is 1% (mA ) / V, to reach constant current effect; idea more the higher the cost, and the risk is proportional.

Features:

1, to make reasonable use of existing switching power supply resources, it is the most economical;

2, constant voltage and constant current technologies is inevitable;

3, is effective in the stability of the product technically creative.

Six LED combination of package is the future trend

Module combination design can effectively reduce disposable packaging costs; packages scattered beneficial to reduce the cost of thermal design; made of aluminum PCB board; easy optical design; simplify the power supply design; package forms; beneficial to enhance the competitiveness of the domestic LED . !

Package structure 'kidnapping' of our optical effect design

Cree, Nichia, Lumileds, OSRAM representative of several packages. To design products, we must first determine who LED highbay light packaging 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 creative play .

Lighting design is ever-changing, and how we can get out of this situation?

Modular package combined with constant current technology

Design LED package at the PCB level to achieve easy and low cost; put our heads can develop different types of packages; product design power LED based on the integration constant current technology and light distribution parameters; effectively respond to ever-changing, ever-changing LED lamps need; power part, using only the existing traditional switch constant voltage supply; improve product delivery speed, lighting design is simple and practical, cost reduced significantly; containment can also avoid the cutting-edge LED packaging patents.

Nine, according to the nominal value of voltage package

LED constant current drive innovative technologies in Shenzhen CYT was born, I named it as "integrated package" of the power LED constant current technology, referred to as "the module package; This technology is directly integrated low-dropout linear high-precision LED packaging technology based on constant current technology; later LED direct nominal voltage specifications appear, such as: 12V/1W 24V/1W 36V/1W 48V/1W 12V/3W, 24V/2W ...... 36V/10W and so on. Future customers to use the CYT technology products design, no longer need to consider any questions about LED constant current, using the existing standard constant voltage supply can be. This technology will declare LED constant current power supply, "said one end!

10, according to the light source product design

To break the original design products according to the light source, in turn, by product custom LED light source package; maximize with product ideas to show low cost; product design optical package structure;; cooling structure designed in conjunction with the product to reduce the thermal resistance; precision constant current; protection function with one. Shenzhen CYT LED laboratory can quickly help you complete the product design.

XI modular light source advantages ① effectively reduce the cost

To reduce the package number of package cost savings;

2, produced the same environment, conditions improve consistency, improve yield;

3, to reduce the cost of optical design;

4, to reduce the cost of thermal design;

5, batch mixing package to reduce the cost of the sub-file;

6, products designed to simplify and reduce the overall cost;

7, inexpensive package architecture. This technology, guidelines LED lighting industry along a healthy direction.

XII reduce the advantages of modular light source (2) thermal resistance

1, light source and shell heat sink is directly bonded;

2, to avoid the PCB as a heat medium;

3, to reduce the chip to the heat dissipation path;

4 new thermal spread technology; most effective to reduce the thermal resistance of heat to solve the problem of thermal design.

13 (3) constant current precision of the light source advantage of the modular

Module unified consider Vf value;

2, the constant current source from outside influence;

3, linear technology is mature, and does not affect the accuracy of peripheral devices;

4, no EMI interference problems affect the accuracy;

5, multiple parallel each other not independently affect accuracy;

6, from power fluctuations in load constant current accuracy. Highest-precision constant current framework, the LED brightness consistency and life optimization design architecture.

XIV modular light source integrated design advantages ④ protection

A built-in temperature protection;

2, the internal power supply and protection technology;

Built-in high grayscale Interface;

4, short-circuit and open circuit protection;

5, can be set linkage protection function;

6, ESD protection.

Any other built-in functions, protection needs.

Fifth, modular light source advantages ⑤ take the traditional power road

This is a prudent first step; optional; costs is the most favorable; switching power supply are not indicators, LED highbay light power supply is also difficult to achieve, detours; Even strong companies design, LED part time verification; completely electromagnetic compatibility issues. Mature power takes time, some of the publicity about the LED power you're in a hurry you believe it? The first constant voltage, the again linear constant current, LED lighting driver market mainstream must!

More info you can visit: www.lead-lighting.com