[Source: "High - tech LED - Technology and Applications" November issue Reporter / Long Zonghui]
"The domestic semiconductor industry has experienced more than ten years of technology accumulation and industrialization development, and we are increasingly confident in catching up with international IC design manufacturers." Shanghai Jingfeng Mingyuan Semiconductor Co., Ltd. (hereinafter referred to as "Jingfeng Mingyuan") Hu Liqiang, general manager, said that the accumulation of technology and the cultivation of talents are prerequisites for us to catch up with international IC design manufacturers. Although the domestic semiconductor industry started relatively late, I believe that domestic IC design companies will rise in the next decade. In some emerging industries, such as LED lighting is a good opportunity, it allows our domestic IC manufacturers and global IC manufacturers to stand on the same starting line, giving our domestic IC design companies and international IC design companies a chance to compete. .
At present, domestic IC manufacturers have been fully capable of solving the application problems of LED lighting driver ICs. Jingfeng Mingyuan has solved the problem of high efficiency and linear adjustment rate of power resistors from the high-voltage startup that is common in the market before. Stability and reliability are becoming more and more mature in technology. If you want to move closer to the high-end market, you must constantly invent new topology and design, so that the product performance exceeds the foreign first-line brand.
Product positioning is cost-effective
In terms of product quality, Jingfeng Mingyuan has always chosen the international first-line brand OEM, which is to value its stability in quality. At the same time, the general LED lighting market is a mass market, and the terminal LED lighting enterprises value the price of the products.
Hu Liqiang believes that in addition to stability and reliability, high cost performance should be an issue that IC manufacturers should pay more attention to. In these years, Jingfengyuan independently developed the auxiliary winding technology, built-in line compensation, PSR technology, etc., reducing the peripheral circuit and making the PCB simpler, saving the peripheral BOM cost of downstream manufacturers and improving the power production efficiency. Ideas.
"Our innovative algorithm makes the whole IC insensitive to transformer parameters, and it is also convenient to improve batch consistency and reduce transformer processing cost." Hu Liqiang introduced that the innovative output algorithm's main output current decision expression is only easy to control with some mass production. The quantity is related, and has nothing to do with some parameters with large deviation, such as the ratio of the transformer to the inductor, which is not sensitive to the inductance. In addition, these algorithms also take into account factors such as output voltage and line voltage change, so that the power supplies of different output voltages can share one. Kinds of circuit and transformer parameters, customers do not need to open multiple projects, repeat research and development, and PCB board, components and inductors are more convenient to stock, less inventory, can effectively reduce costs for customers, design more flexible and convenient power supply.
From the current technological development route, isolation is an important technological development direction in the future, and they have unique advantages in pressure resistance. However, in terms of cost performance, the advantages of non-isolation are becoming more and more obvious. With the improvement of LED light efficiency, heat dissipation becomes simpler. The innovation of heat-dissipating material technology makes the heat-dissipating effect of many heat-conductive plastics close to aluminum, and can also reach Withstand voltage requirements, this is also a good push for non-isolated drives. Advances in these beading and heat dissipation have made non-isolation inherently high efficiency, small size, and low cost more and more popular. The emerging high-voltage linear constant current source is also a non-isolated structure.
Products pay more attention to reliability
At present, some engineers have proposed the "de-energization" technology. From the characteristics of constant current and constant voltage of LED illumination, even if a high-voltage linear constant current source is used, if the reliability of LED illumination is to be ensured, it is inseparable from LED. Drive power. Advances in technology have made power supplies easier and simpler. From the perspective of reliability, "de-energization" remains to be discussed.
In order to further improve the reliability of the existing LED driver power supply, Jingfeng Mingyuan launched dynamic ambient temperature control technology in 2012. Hu Liqiang introduced that whether it is due to excessive ambient temperature or overheating caused by LED lamp beads, it will lead to power supply and LED lights. The life of the beads is shortened. The dynamic ambient temperature control technology provided by Jingfeng Mingyuan can dynamically adjust the LED output current according to the ambient temperature to ensure that the LED lamps and LED driving power supply are kept within a certain temperature range, thereby ensuring the long life of the LED lamps.
Unfinished
For more information, please refer to "High - tech LED - Technology and Applications" November issue
"The domestic semiconductor industry has experienced more than ten years of technology accumulation and industrialization development, and we are increasingly confident in catching up with international IC design manufacturers." Shanghai Jingfeng Mingyuan Semiconductor Co., Ltd. (hereinafter referred to as "Jingfeng Mingyuan") Hu Liqiang, general manager, said that the accumulation of technology and the cultivation of talents are prerequisites for us to catch up with international IC design manufacturers. Although the domestic semiconductor industry started relatively late, I believe that domestic IC design companies will rise in the next decade. In some emerging industries, such as LED lighting is a good opportunity, it allows our domestic IC manufacturers and global IC manufacturers to stand on the same starting line, giving our domestic IC design companies and international IC design companies a chance to compete. .
At present, domestic IC manufacturers have been fully capable of solving the application problems of LED lighting driver ICs. Jingfeng Mingyuan has solved the problem of high efficiency and linear adjustment rate of power resistors from the high-voltage startup that is common in the market before. Stability and reliability are becoming more and more mature in technology. If you want to move closer to the high-end market, you must constantly invent new topology and design, so that the product performance exceeds the foreign first-line brand.
Product positioning is cost-effective
In terms of product quality, Jingfeng Mingyuan has always chosen the international first-line brand OEM, which is to value its stability in quality. At the same time, the general LED lighting market is a mass market, and the terminal LED lighting enterprises value the price of the products.
Hu Liqiang believes that in addition to stability and reliability, high cost performance should be an issue that IC manufacturers should pay more attention to. In these years, Jingfengyuan independently developed the auxiliary winding technology, built-in line compensation, PSR technology, etc., reducing the peripheral circuit and making the PCB simpler, saving the peripheral BOM cost of downstream manufacturers and improving the power production efficiency. Ideas.
"Our innovative algorithm makes the whole IC insensitive to transformer parameters, and it is also convenient to improve batch consistency and reduce transformer processing cost." Hu Liqiang introduced that the innovative output algorithm's main output current decision expression is only easy to control with some mass production. The quantity is related, and has nothing to do with some parameters with large deviation, such as the ratio of the transformer to the inductor, which is not sensitive to the inductance. In addition, these algorithms also take into account factors such as output voltage and line voltage change, so that the power supplies of different output voltages can share one. Kinds of circuit and transformer parameters, customers do not need to open multiple projects, repeat research and development, and PCB board, components and inductors are more convenient to stock, less inventory, can effectively reduce costs for customers, design more flexible and convenient power supply.
From the current technological development route, isolation is an important technological development direction in the future, and they have unique advantages in pressure resistance. However, in terms of cost performance, the advantages of non-isolation are becoming more and more obvious. With the improvement of LED light efficiency, heat dissipation becomes simpler. The innovation of heat-dissipating material technology makes the heat-dissipating effect of many heat-conductive plastics close to aluminum, and can also reach Withstand voltage requirements, this is also a good push for non-isolated drives. Advances in these beading and heat dissipation have made non-isolation inherently high efficiency, small size, and low cost more and more popular. The emerging high-voltage linear constant current source is also a non-isolated structure.
Products pay more attention to reliability
At present, some engineers have proposed the "de-energization" technology. From the characteristics of constant current and constant voltage of LED illumination, even if a high-voltage linear constant current source is used, if the reliability of LED illumination is to be ensured, it is inseparable from LED. Drive power. Advances in technology have made power supplies easier and simpler. From the perspective of reliability, "de-energization" remains to be discussed.
In order to further improve the reliability of the existing LED driver power supply, Jingfeng Mingyuan launched dynamic ambient temperature control technology in 2012. Hu Liqiang introduced that whether it is due to excessive ambient temperature or overheating caused by LED lamp beads, it will lead to power supply and LED lights. The life of the beads is shortened. The dynamic ambient temperature control technology provided by Jingfeng Mingyuan can dynamically adjust the LED output current according to the ambient temperature to ensure that the LED lamps and LED driving power supply are kept within a certain temperature range, thereby ensuring the long life of the LED lamps.
Unfinished
For more information, please refer to "High - tech LED - Technology and Applications" November issue
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