At present, many engineering and procurement personnel of lighting manufacturers, and even the company's CEOs, understand the understanding of LED power supply is very one-sided. This has brought great obstacles to the procurement and use of LED power. In addition to the waste of time, energy and manpower, and finally the phenomenon of product mismatch, it is futile. Liao Yuzhu, general manager of Dongguan Linguan Semiconductor Lighting Co., Ltd., who has been focusing on LED driver power research and development technology, summarized some common misunderstandings based on his own rich experience and observations on the market. In the previous news, LED driver power supply misunderstanding Two of them have been introduced, which have also aroused widespread concern among practitioners in the industry. This article will share the misunderstanding of the quality of the other three certified power supplies. 1 Safety certification is only for product safety performance and electromagnetic interference test control, to ensure that the product will not cause fire, electric shock, or to prevent other electronic equipment from being disturbed. However, the function and quality of the product are not controlled, so the evaluation of the functional test requires the manufacturer to control, grasp, or carefully evaluate and test the application. 2LED power supply, especially the built-in power supply of the light source, is often limited by the internal size and volume, and can not be made too large, so that the quality of the power supply certified by the safety regulations can not be compared with the power supply that cannot pass the safety certification. This view may raise many people's doubts. The reason is that under the same size limit, the certified power supply requires more filtering inductors and capacitors, which reduces the storage space of the power device and the leakage inductance of the certified power supply. It is far greater than the power supply transformer that cannot be certified. The efficiency drop and the MOS peak voltage become high. It is a quality problem of the certified power supply. Therefore, under the same size and condition constraints, and the same scheme, materials and process, the certified power supply Quality stability is far worse than certification. 3 Through the above two points of answers, you may be worried about the quality of the power supply certified by the safety regulations. In fact, this is relative to the certified power supply, so you don't have to worry too much. Imagine that if a company invests hundreds of thousands or even millions of dollars for certification, it must be prepared to promote the product in large quantities, but only if it must have reliable product quality. In the early design verification and later process manufacturing, it is necessary to ensure its quality. Finally, Mr. Liao concluded: First, the application should be clear about which aspects of its products are focused. If the end customer emphasizes that there must be safety certification, then the power supply of the corresponding certificate manufacturer must be purchased; if the end customer does not require it, the focus of the product should be to ensure the reliability of the product, but the procurement can be certified but the performance and quality are reliable. The product, the power supply without certification, reduces the cost of procurement and greatly improves the reliability of the product. Therefore, the industry always blames the LED light supply failure on the LED power supply, which is considered to be unreliable. In fact, this is just that the procurement application of everyone is not properly matched. Choosing the right product for you is the best solution!
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