The new LED drive to power technology

Analysis of a.LED lighting route

The lighting design is based on the three parts of the LED light emitting part, the driving control part and the design of the optical cooling structure.

1 light emitting part: LED light-emitting chip light efficiency continues to improve, LED is not a dispute over energy saving light. In the next few years, there will be further improvement, accelerate the application of LED has laid a solid foundation for the design of lamps will become simple trend. Packaging will be changed according to the application of the lamp, a long time in accordance with the development of LED packaging design, with the understanding of the LED package heat dissipation, more suitable for the packaging of special lighting will be born. LED epitaxial upstream investment increase, increased competition, downstream applications have not yet, it is bound to cause a substantial decline in the price of LED chips. Compared to the cost of packaging is much faster, some LED costs have been lower than the cost of packaging, packaging technology innovation is one of the most important part of the development of LED.

2 drive control: drive conversion efficiency is one of the most effective solutions. Improve the power conversion efficiency, can reduce the whole lamp power, is to improve the overall lighting efficiency, save the heat dissipation design costs. Power factor requirements before the switching power supply no regulatory requirements, but the LED lamps to the country with a rigid index. Reliability, life expectancy is also an important part of the current. There are also aspects of color temperature, brightness, and intelligence that are also in the future, at a later time.

3 optical design and radiator: optical design humanization, the recent development of the design of the lamp, or along the alternative route to start. The future of LED to develop more suitable for their own LED lighting products, heat dissipation structure tends to be more reasonable, more standardized module light source advantages. New material cooling technology has been introduced, the cost will be further reduced.

We have to give the company a position, a competitive basis. We understand the power supply design, find a breakthrough point here, focusing on the development of future analysis. We want to develop a number of new drivers, in order to completely cancel the electronic transformers, inductors and electrolytic capacitors, in order to really enhance the life of lamps. Equipped with a built-in power supply, the internal components of up to 100 degrees Celsius, including electrolytic capacitors, magnetic materials and enameled wire are short life threats.

Analysts believe that only the elimination of short-lived components of the LED lamp indicators can be integrated to improve the elimination of inductance, electronic transformers, electrolytic capacitors, a complete solution to the problem of life and volume. Improve power supply efficiency, Jian Xiaofa heat source to extend lamp life. It is well known that only innovative technology can make their own leapfrog development, intercepted in the evolution of LED technology on the road. Only independent innovation, access to more intellectual property rights, paving the way for the subsequent development of LED.

Cancel the power supply can not be understood as no need to drive, but not do not". But to cancel the power of some parts of the life of the device, a new LED driver, named "go to power technology".

Two. High voltage nominal LED design

The development of "power supply design" must be the development of high voltage LEDs, multiple LED series connection can be referred to as high voltage LEDs, serial mode of lithography technology, flip chip connection, COB gold wire connection, PCB single particle welding. Long express chose lithography technology, we are a professional Integrated Circuit Design Company, well aware of lithography technology maturity and production efficiency. We appreciate the flip chip technology, it takes time to get the market price. COB gold wire connection, the quantity is too much quality is difficult to guarantee, gold wire absorption of blue light efficiency will be reduced, the price of gold is strong, so the COB gold wire connection can only be used as a market segment, the popularity of the scale is limited.

Long express Optoelectronics Research believes that the current design of lamps using a single particle of low pressure LED, which is the main reason for the design of lamps need power conversion. The best way to get the best drive efficiency is to make the LED voltage closer to the drive voltage. This does not require power conversion, constant current source to simplify the circuit structure can complete the task of driving.

Long ray photoelectric research found that LED has the same characteristics as incandescent lamp. Incandescent tungsten filament light can be used to adapt to the 1.5-380V voltage, the length and thickness of the tungsten wire to obtain different impedance, to adapt to different voltage drive requirements. The LED can also use a number of series connected to obtain different high voltage values, the nominal voltage is the development of high voltage LEDs guide. In fact, the exchange of foreign LED and high voltage LED is achieved by lithography technology, officially because the deviation from the nominal value of the guide, has not been able to find the right market positioning.

The need for the development of a number of nominal value of the voltage long express photoelectric research that, the national market voltage is mainly 110V and 220V, in the same power can be obtained under the same power string and light source. To this end, the city focused on the development of a 110V-LEDs to meet the lighting needs. In the low-voltage power supply, switching power supply for a long time to form the 12V, 24V, 36V, 48V nominal voltage, the car is 12V or 24V voltage, wind and solar energy storage batteries are required, the need is 12V and 24V. To this end, we should focus on the design of 12V-LED, because 24V, 36V, 48V are multiples of 12V, under normal circumstances, LEDs series, can be flexible design products.

High voltage LEDs can make our design no longer need power supply voltage conversion, or the use of traditional mature switching power supply, no need to develop new power systems. Also welcome new power supply design support LED,