To design a product, we must first determine whose LED package structure to use; then consider how to adapt to these package forms; there are not many opportunities for us to choose, and the optical structure is based on these packages; many of our ideas cannot be played well . The following introduces the key issues and analysis in the LED lighting design process.
1. Problems in the application of semiconductor lighting
1. Heat dissipation
2. Lack of standards, products are mixed
3. There are problems of price and design quality, and final consumers lack confidence in choosing LED lighting
4. Semiconductor lighting is very different from traditional lighting in electrical design. Traditional lighting companies need experience/skill accumulation process
5. Everyone is optimistic about the market, but there is no scale
Features:
1. By adjusting the high-precision constant current chip to ensure the consistency of LED brightness and chromaticity, at the module level, we can provide standard, customized and reliable high-quality products for downstream customers;
2. For new and old lamp design manufacturers, don’t make too complicated electrical design, just add a traditional constant voltage power supply to the outside to work with simple circuit design, which is the fastest and most reliable way;
3. Solve the large-scale technical and quality problems in the LED lighting market.
2. Heat dissipation design
1. The shortest heat transfer path to reduce heat conduction resistance;
2. Increase the mutual conduction area and increase the speed of heat transfer;
3. Reasonable calculation and design of heat dissipation area;
4. Effective use of heat capacity effect.
Output drive voltage selection:
1. About 48V is more suitable when the mains drive within 20W;
2. Larger power mains drive output voltage of about 36V is the most suitable;
3. Off-line lighting is mostly 12V and 24V voltage.
Features:
1. Consider the appropriate drive voltage value for the load based on the safety of series and parallel connection, and try to unify the voltage value to reduce the cost of power supply design specifications;
2. Based on the safety regulations, the product design must meet the certification requirements, and the current peak value exceeds 42.4Vac or the DC voltage exceeds 60Vdc;
3. Considering the technical and quality problems of solving large-scale LED lighting market.
3. The most efficient back-end drive mode
When the output voltage is around 48V, the constant current efficiency of the low dropout linear constant current device is as high as 99%, the constant current accuracy is within ±3%, and is not affected by any peripheral devices; when the output voltage is around 36V, the low dropout linear constant current device The constant current efficiency is as high as 98.6%, the constant current accuracy is within ±3%, and it is not affected by any peripheral devices; even in the off-line lighting part, the lower voltages of 12V and 24V have 96% and 98% efficiencies respectively; power size Efficiency is equal.
Features: The most efficient driving constant current structure; the highest precision constant current method, which is minimally affected by peripheral devices; simple, convenient and practical.
Fourth, the power consumption of constant current consumption has reached a negligible level
In the Shenzhen CYT company laboratory, we have verified that the back-end constant current efficiency reaches 99.99375%, which can be completely ignored;
In the future, we will complete this design achievement in one year. The IC design team of more than ten people will cooperate with powerful power supply manufacturers to complete this goal as soon as possible.
5. AC-DC design
The development of switching power supply today is the result of years of accumulation. In the short term, the direct constant current of AC-DC cannot be broken through; the relationship between constant voltage and constant current is a contradiction and must be considered separately; )/V, the constant current effect cannot be achieved; the more ideas, the higher the cost, which is proportional to the risk.
Features:
1. It is the most economical to use the existing switching power supply resources reasonably;
2. The combination of constant voltage and constant current technology is inevitable;
3. Creativity is effective only in stable product technology.
Six, LED combined packaging is the future development trend
The combined design of the module can effectively reduce the cost of one-time packaging; the scattered packaging form is conducive to reducing the cost of heat dissipation design; the choice of domestic aluminum-based PCB board; easy optical design; simplified power supply design; various packaging forms; it is beneficial to enhance the competition of domestic LEDs force. !
7. The package structure 'kidnapped' our optical effect design
These are representative packages of CREE, Nichia, Lumileds, and OSRAM. To design a product, we must first determine whose LED package structure to use; then consider how to adapt to these package forms; there are not many opportunities for us to choose, and the optical structure is based on these packages; many of our ideas cannot be played well .
Lamp design is ever-changing, how can we get rid of this situation?
8. Combination of modular packaging and constant current technology
Designing LED packages at the PCB board level is easy and low-cost; everyone can develop different types of packages by brainstorming; design products on the basis of power LEDs after integrating constant current technology and light distribution parameters; effectively deal with the ever-changing and ever-changing LED lighting needs; the power supply part is only powered by the existing traditional switching constant voltage power supply; the product launch speed is improved, the lighting design is simple and practical, and the cost is greatly reduced; it can also avoid the containment of cutting-edge LED packaging patents.
Nine, according to the nominal value of the voltage package
The LED constant current drive innovation technology was born in Shenzhen CYT. I named it "Power LED Constant Current Integrated Packaging" technology, referred to as "Module Packaging"; this technology is based on LED packaging technology. Flow technology; in the future, LED can directly appear in nominal voltage value specifications, such as: 12V/1W, 24V/1W, 36V/1W, 48V/1W, 12V/3W, 24V/2W...36V/10W and so on. In the future, customers who use CYT technology for product design no longer need to consider any LED constant current issues, and can use the existing standard constant voltage power supply to supply power. This technology will announce the end of "LED constant current power supply"!
10. Light source according to product design
Break the original design of products according to the light source, and in turn customize the LED light source packaging form according to the product; maximize the creative display of the product; due to the product design of the optical packaging structure; low cost; combined with the product design heat dissipation structure, thermal resistance is reduced; The protection function is integrated. Shenzhen CYT company LED laboratory can quickly help you complete product design.
Benwei Lighting is an LED Tube, LED flood light, LED Panel Light, LED High Bay, LED manufacturer with 12 years of experience. If you want to purchase a high-quality LED flood light or have a more in-depth understanding of the application of LED flood lights, please contact send us inquiry， our web: https://www.benweilight.com/.
