LED application different circuit design concepts are also slightly different1

Although LED lighting is promising and the industry has invested a lot in the field of LED chips, it is still an important role in driving LED light sources in terms of circuit design. even if the chip and package are done well, the poor circuit design is futile. Generally speaking, the circuit design of LED lighting still does not take off the basic key points of volume and cost. but PFC is also one of the important reference indicators. From the overall LED lighting system, LED chips and packaging accounts for a relatively high proportion of the overall cost. However, although the proportion of circuit design is not high, however, after all, it is the relationship between energy saving and carbon saving. How to reduce its power consumption has become a topic that system operators must think about, but on the other hand, LED lighting is also facing many design requirements such as cost, service life and volume. Under the condition of facing many requirements at the same time, the system industry will also shift the pressure to the semiconductor industry. it also makes the semiconductor industry face some challenges in providing solutions. Lin Zhiyan, technical marketing manager of the semiconductor computing and consumer products business group, pointed out that according to his own observation, the lighting industry is quite unfamiliar with circuit design. This kind of problem, it is usually left to the semiconductor industry to find a solution, and the lighting industry can spend more time on the mechanism, optics, heat dissipation and exterior design to achieve twice the result with half the effort. Lin Zhiyan further pointed out that since the lighting industry is quite unfamiliar with the circuit design, in order to meet the requirements of appearance or institutional design, the semiconductor industry must assist the customer to solve all problems as much as possible from the perspective of cooperation. in addition, rapid mass production is needed. In the design of developing circuit boards, it is also possible to enter the process of shipment as soon as possible and as soon as possible. The application of different circuit design concepts is also slightly different. The application fields of LED lighting can be roughly divided into indoor, outdoor and vehicle lighting types, although these three fields can still be subdivided into quite a few categories. however, in the end, there is not much difference in circuit design. Most of the differences are in operating temperature, system volume, reliability and cost. For example, indoor lighting applications, such as home or commercial applications, will pay more attention to cost and system volume issues. For outdoor lighting, it may be less necessary to consider cost. but in the operating temperature and reliability, it will be relatively important. As for vehicle lighting, although AC-is not required The help of DC components, but after all, is highly related to personal safety, and will be particularly required in terms of reliability and service life. Different indoor and outdoor requirements compared with indoor outdoor lighting, its working environment is more stringent, the level of the supplier is large, and there is no clear standard for outdoor lighting at this stage. it is expected that the outdoor lighting market will grow further in the future and will still take some time. However, apart from the external environment, in fact, the power demand for outdoor lighting is relatively high. The main reason is that there are more LED lamps. After series connection, the power will also increase. if it is carried out in parallel, it will also face the problem of conduction voltage. Therefore, if it is to develop outdoor lighting, its solution must be relatively complete to meet the design requirements. Both indoor and outdoor lighting require AC- DC component for AC/DC conversion, but still need DC- The assistance of DC can light the LED light source. Although both types of components are very important, the former must carry 110V or 220V high voltage, which is relatively difficult to enter the threshold. the latter enters a low threshold and the competition is fierce.