The increasing competition in all aspects of the LED industry chain has spawned some highly integrated products with low cost and high cost performance. Among them, CSP and linear constant current driver IC (linear IC) have the highest voice in the industry, while linear constant current drive IC has taken the lead in breaking through the bottlenecks and entering a substantive application phase. At present, there are many enterprises that develop linear constant current drive ICs in China. Among them, Shenzhen Mingwei Electronics Co., Ltd. has developed more prominently in this field and quickly occupied market share. Aladdin News Center reporter recently interviewed Mingwei Electronics. Zhao Chunbo, Marketing Director, understands the development status of linear constant current drive ICs and the development direction of enterprises. The advantages of linear IC are gradually emerging. In view of the fact that some people do not know much about linear constant current driving chips, Zhao Chunbo firstly analyzed its advantages and disadvantages: its main disadvantage is that the lamp voltage is limited and the input range is relatively narrow; The linear constant current scheme is simple and easy to produce, and can realize full patching, which is easy to automate and batch, so the labor cost of production is low. As the cost of the lamp be slowly reduced, the linear constant current scheme is more advantageous than the non-isolated power supply in certain power segments. And the linear constant current scheme has very few customer complaints, which reduces the cost of after-sales service. In addition, the intelligent lighting control realized by the linear constant current driving IC is simpler than that of the switching power supply. However, the smart lighting market will take two years or even three years to heat up, because smart lighting needs to be combined with smart homes and smart cities to be truly popular. At this stage, it is more of a concept or initial development, but it is undeniable that it is A trend, Ming Microelectronics has also been doing technical storage of intelligent lighting, and some of the development products have been pushed to the market. It is understood that linear IC has been launched in the past few years, but the market has been tepid, Zhao Chunbo believes that it is affected by factors such as concept, application environment, market and price. First, users who have used switching power supplies are reluctant to linear ICs. It takes a certain amount of time to change this concept. Second, current linear ICs are not suitable for some markets with narrow input voltage ranges. The current technology can actually achieve a wide voltage range, but at the same time other performance will be worse, such as: PF value is low. But I believe this is just a transitional product in the process of progress, and this technology will be broken in the future. Third, in some applications, an external power supply is required. It is virtually impossible to achieve a 100% complete replacement of the switching power supply by the linear constant current scheme. The unwillingness of the packaging manufacturers also makes the development of linear constant current schemes slow, because for them, packaging high-voltage lamp beads will reduce the amount of lamp beads, and the overall profit is lower than ordinary lamp beads. However, recently, large enterprises have successively launched high-power high-voltage lamp beads, which has brought about the effect of the big factory, and the output has increased, gradually reducing the cost of the lamp. Price is always the final guide. Zhao Chunbo said. At present, the market share of linear IC is around 15%. Although the proportion is not much, the upward trend is obvious. Especially under the guiding role of large companies, many companies have already tried to use linear constant current schemes to develop according to this trend. Going forward, the market share can reach 30%-40% in the next two years. . Zhao Chunbo is very optimistic about the development prospects of linear IC.
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