With the rapid development of LED technology, various corresponding accessories and supporting technologies have also developed rapidly. The chip and drive technology are flourishing, and the exploration of various new programs and new models is endless. This has also contributed to the further development of LED lamps. Rapid development.
Since the evolution of LED, the drive has continued to evolve and adapt to the needs of the market. There are many solutions, from the initial single drive solution to multiple solutions. The situation that leads the way. The demand for power drivers in the LED market is diversified. There is no single solution that can meet the needs of all market segments. Different applications have different technologies to deal with. While increasing the integration of LED drivers , achieving better dimming control while providing complete protection... all this greatly simplifies the design and production of lamps .
For LED general lighting products, the current mainstream drive solutions are as follows (specific product drive solutions are not included)
1. Constant current isolated switching power supply.
2, constant current non-isolated switching power supply
3, RC capacitor power supply
4, linear IC step-down power supply
5, constant pressure program
....
In the current fierce competition, it is extremely important to correctly position your products and choose the right products. Determine your market direction, competitors, and the final price and value of the products. The vitality of the products is reflected in the selection plan.
Putting away the lamp beads and the casing here, we will not discuss it for a while. The driver is one of the most important factors in determining the quality of LED lamps. Choose how to make up our products and choose what kind of quality driver to do. It has become a heart disease for many companies to decide.
Put on the market rules, only the most suitable products, there is no best product. The right product is the best product for the consumer, the so-called marketable.
The key to driving and illuminating the application is to see how the driver is used, the application program is good, the product is the ultimate, it is a good product, and it has a cost performance.
Discussion of issues:
Analysis of several mainstream drive applications:
The mainstream driver solutions in the market are nothing more than everyone knows: isolated constant current, non-isolated constant current, RC, high voltage linear, constant voltage drive.
Question 1. What kind of drive scheme is a good driver?
There are several key parameters for evaluating drive quality: life (mainly electrolysis); drive safety EMI; surge; turbulence value; harmonic value; PF value, strobe, etc. Driven by national standards, it has been incorporated into mandatory 3C certification since September 1, 2015.
Yan Yongfeng of the United States: Isolating the constant current and leading the mainstream.
Wanjia Optoelectronics Zhang Dongyuan: Isolated constant current has a large short plate, low conversion efficiency and high price.
Ji Si Optoelectronics Yuan Chengjun: The mainstream should be non-isolated constant current, and the isolation can only be developed to the higher end; the non-isolated constant current cost is low, and the safety regulations of the lamps need to be done well, so that it can be applied to the lighting products on a large scale.
Li Yibin: At present, constant current isolation is still the mainstream solution for the production of mature products in major factories. The constant current isolation switching power supply has existed since the LED has not been applied on a large scale. This driving performance is stable and the scheme is mature. In addition, in recent years, the development of lighting ICs has been almost the ultimate. The solutions are almost the same. The certifications are almost the same. The certifications are similar. However, the certifications are similar. The differences are only in the selection of materials. The principle is basically the same. The program is the mainstream product of LED development in recent years. At present, various manufacturers are still applying on a large scale and are recognized by all professional and non-professionals. Non-isolated applications are used in some product categories, such as T8 T5, plastic shell bulbs, etc., but many can not pass the safety test.
Ye Bin: Light source type, selfballaste type of lamp can be considered non-isolated, because the conditions of use can be circumvented, such as bulbs, lamps, the conditions of use is that he is on the lighting or need other matching shell to be able to illuminate. Lamps, non-isolated drive solutions are used in products with unregulated safety conditions because of profit-driven,
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