In the past 2014, it was called the “outbreak year†of the LED industry. However, the LED companies’ running and closing events occurred frequently in the second half of the year, which accelerated the pace of industry reshuffle and promoted the industry to be more standardized and rational. The direction of development. It is not difficult to find that the LED industry has entered a big era of change.
With the gradual maturity and improvement of LED lighting technology and product lines, the cost performance of LED lighting products is getting higher and higher, driving the market demand for LED lighting to expand rapidly. The High-Tech LED Industry Research Institute (GLII) predicts that the next three years will be the prime time for the expansion of the LED lighting industry. It is estimated that the output value of China's LED lighting will reach 304.7 billion yuan in 2015, a year-on-year growth rate of 37%.
The rapid development of the LED lighting market has injected new vitality into the driving IC market, and it has also placed higher demands on enterprises. In the face of increasingly fierce market competition, everyone is actively thinking about how to optimize product lines, reduce procurement costs, and at the same time increase research and development efforts to develop innovative and cost-effective products.
Active layout of intelligent lighting
In the past two years, to ask what is the most fire in the LED lighting industry, then non- intelligent lighting is the only one . The emergence of intelligent lighting has greatly saved manpower in the field of commercial lighting and improved management efficiency. At the same time, it also brings a broader lighting design space to the field of home lighting.
LED power and driver IC companies are beginning to flex their muscles as they are optimistic about the future development of smart lighting. Domestic IC companies including Silan Micro, Mingwei Electronics, Dialog, etc. have laid out the market in order to make breakthroughs in technology, so that their products can better match smart lighting.
DIA Power Market Director Yan Liang recently said at the high-tech LED annual meeting that in the face of the growing demand for intelligent lighting market, Dialog has continuously innovated in the conversion of driver IC products, and launched a series of dimming control chips for intelligent lighting. The product adopts digital control as the core, which can effectively meet the signal and power control requirements of intelligent lighting drive.
“For example, our iW3688 can support buck-boost (non-isolated scheme) or flyback topology (isolation scheme), and also supports front-cut or post-cut dimmers, compatible with most intelligently controlled phase-cut dimmers.†Yan Liang said that when the product is running without dimmer, PF>0.9, THD<20%, suitable for wide dimming range of 1%-100%.
In order to adapt to the "intelligent" development trend, Ming Micro Electronics has also launched a series of IC products, including integrated intelligent application chips SM2211E and SM2212E under linear constant current driving mode.
"These products do not need to add additional dimming originals, no need to change the wiring, and do not add any dimmers." Li Zhaohua, deputy general manager of Ming Microelectronics, said that it has a variety of dimming methods such as Bluetooth, WIFI, ZigBee, etc. Flashing, easily verified by conducted radiation.
Li Zhaohua believes that the birth of intelligent lighting has accelerated the arrival of the Internet of Things era. In the future, smart lighting will accelerate to expand into the network field, software field, and mobile phone field (tablet system). At the same time, with the deepening of the concept of intelligent lighting, the speed of lighting popularization is accelerated and the cost is further reduced. In the future, intelligent lighting must be the mainstream of lighting, and also the trend and direction of LED lighting driving technology challenges.
Linear drive to drive new directions
Currently in the field of LED general lighting, there are many LED products that are still driven by a switch mode power supply. However, in recent years, with the continuous improvement of the linear drive, the drive volume has become smaller and compatible with TRIAC dimming, which can extend the life of the bulb and reduce the cost, and is expected to become a new direction of LED driving in the future.
“The LED lighting driver has evolved from the original bulky and bulky isolation type to the current non-isolated type, which is smaller and more efficient.†Li Zhaohua said that as the size of the bulb on the market is getting smaller and smaller, the driver IC will also gradually evolve from the current mainstream non-isolated type to the future linear drive and integration.
In order to solve the problem that LED lamps have serious light decay and reduce LED service life due to the high internal temperature of LED lamps, Mingwei Electronics has introduced linear constant current driving chips such as SM2083 and SM2086. "These chips integrate temperature compensation. When the internal junction temperature of the chip exceeds a certain temperature (such as 110?C), the output current will be automatically reduced to reduce the internal temperature of the lamp."
In addition, because the linear drive is free of transformers, inductors and other components, it is easy to seal with the LED lamp bead . In addition, the linear drive does not involve the transient process of "switching power supply", and there is no EMC interference problem. Therefore, the linear drive is also called "green". Constant current power supply."
In addition to Ming Microelectronics, Dianbu Integrated has continued to focus on the development of linear constant current drive ICs since last year. Its general manager Chen Hengyu said that the company's self-developed high-order segmented linear constant current drive IC-SDS3108 has been acquired. A number of invention patents.
Chen Hengyu introduced, "This high-order segmentation technology uses N-type switches and P-type switches to cooperate with each other. The power efficiency can reach more than 93%, and the heat dissipation power is reduced by 60% compared with the four-stage linear constant current chip. The technical application of 'dynamic configuration' and 'active filling valley'.
Chen Hengyou believes that compared with switching power supply, linear constant current drive has the advantages of low cost, convenient installation, long lamp life and simple intelligent dimming. Therefore, linear drive will become an important trend in the development of LED industry.
Future to cost-driven
In the future, the competition in the LED industry is a battle for cost performance, and the continuous improvement of cost performance has become the goal of the entire LED industry chain. As the price of LED terminal products continues to decline, the proportion of LED driver ICs in the overall cost of lighting fixtures has become more and more prominent, driving chip manufacturers to compete to optimize the driving scheme to meet the low-cost requirements of related manufacturers.
According to Chen Hengyu, traditional power supplies include transformers, resistors, capacitors, etc. Since all components consume energy, the more peripheral components, the more energy the power supply consumes. “So under the premise of ensuring safety and stability, the fewer parts, the more energy-saving, the higher the integration, and the lower the cost.â€
In addition, the simplification of the peripheral circuit allows the drive power board to add heat dissipation to the LED luminaire, leaving more room for EMC. As a result, IC companies began to think about how to save some components in the application circuit to save production costs. However, the industry reminds that reducing the material cost of LED drive power must be based on the premise of not sacrificing performance and safety.
Dr. Yi Yangbo, deputy general manager of Xinpeng Microelectronics, said, “We don’t agree with the relevant driver IC companies to simply reduce the external component specifications, reduce the cost of protecting devices, etc., low-level cut corners will only bring the entire system. The risk of failure of control."
Yi Yangbo said that the solution can generally reduce the number of BOMs by integrating more devices into the IC, and reduce the built-in MOS internal resistance to increase the integrated power.
Based on this, Xinpeng Microelectronics introduced PN8316/8317, which is suitable for peripherally simplified medium-power non-isolated LED lighting. This series of ICs integrates 5N65 high-voltage MOS, and can share the same PCB board from 12-40W. Need to plug in the inductor / chip, that is, 90% of the components can be shared, the preparation is very convenient.
"Simple is strength. I think that the overall system of LED driver ICs in the future should be developed in the direction of cost-driven and simplification." Yi Yangbo said.
With the gradual maturity and improvement of LED lighting technology and product lines, the cost performance of LED lighting products is getting higher and higher, driving the market demand for LED lighting to expand rapidly. The High-Tech LED Industry Research Institute (GLII) predicts that the next three years will be the prime time for the expansion of the LED lighting industry. It is estimated that the output value of China's LED lighting will reach 304.7 billion yuan in 2015, a year-on-year growth rate of 37%.
The rapid development of the LED lighting market has injected new vitality into the driving IC market, and it has also placed higher demands on enterprises. In the face of increasingly fierce market competition, everyone is actively thinking about how to optimize product lines, reduce procurement costs, and at the same time increase research and development efforts to develop innovative and cost-effective products.
Active layout of intelligent lighting
In the past two years, to ask what is the most fire in the LED lighting industry, then non- intelligent lighting is the only one . The emergence of intelligent lighting has greatly saved manpower in the field of commercial lighting and improved management efficiency. At the same time, it also brings a broader lighting design space to the field of home lighting.
LED power and driver IC companies are beginning to flex their muscles as they are optimistic about the future development of smart lighting. Domestic IC companies including Silan Micro, Mingwei Electronics, Dialog, etc. have laid out the market in order to make breakthroughs in technology, so that their products can better match smart lighting.
DIA Power Market Director Yan Liang recently said at the high-tech LED annual meeting that in the face of the growing demand for intelligent lighting market, Dialog has continuously innovated in the conversion of driver IC products, and launched a series of dimming control chips for intelligent lighting. The product adopts digital control as the core, which can effectively meet the signal and power control requirements of intelligent lighting drive.
“For example, our iW3688 can support buck-boost (non-isolated scheme) or flyback topology (isolation scheme), and also supports front-cut or post-cut dimmers, compatible with most intelligently controlled phase-cut dimmers.†Yan Liang said that when the product is running without dimmer, PF>0.9, THD<20%, suitable for wide dimming range of 1%-100%.
In order to adapt to the "intelligent" development trend, Ming Micro Electronics has also launched a series of IC products, including integrated intelligent application chips SM2211E and SM2212E under linear constant current driving mode.
"These products do not need to add additional dimming originals, no need to change the wiring, and do not add any dimmers." Li Zhaohua, deputy general manager of Ming Microelectronics, said that it has a variety of dimming methods such as Bluetooth, WIFI, ZigBee, etc. Flashing, easily verified by conducted radiation.
Li Zhaohua believes that the birth of intelligent lighting has accelerated the arrival of the Internet of Things era. In the future, smart lighting will accelerate to expand into the network field, software field, and mobile phone field (tablet system). At the same time, with the deepening of the concept of intelligent lighting, the speed of lighting popularization is accelerated and the cost is further reduced. In the future, intelligent lighting must be the mainstream of lighting, and also the trend and direction of LED lighting driving technology challenges.
Linear drive to drive new directions
Currently in the field of LED general lighting, there are many LED products that are still driven by a switch mode power supply. However, in recent years, with the continuous improvement of the linear drive, the drive volume has become smaller and compatible with TRIAC dimming, which can extend the life of the bulb and reduce the cost, and is expected to become a new direction of LED driving in the future.
“The LED lighting driver has evolved from the original bulky and bulky isolation type to the current non-isolated type, which is smaller and more efficient.†Li Zhaohua said that as the size of the bulb on the market is getting smaller and smaller, the driver IC will also gradually evolve from the current mainstream non-isolated type to the future linear drive and integration.
In order to solve the problem that LED lamps have serious light decay and reduce LED service life due to the high internal temperature of LED lamps, Mingwei Electronics has introduced linear constant current driving chips such as SM2083 and SM2086. "These chips integrate temperature compensation. When the internal junction temperature of the chip exceeds a certain temperature (such as 110?C), the output current will be automatically reduced to reduce the internal temperature of the lamp."
In addition, because the linear drive is free of transformers, inductors and other components, it is easy to seal with the LED lamp bead . In addition, the linear drive does not involve the transient process of "switching power supply", and there is no EMC interference problem. Therefore, the linear drive is also called "green". Constant current power supply."
In addition to Ming Microelectronics, Dianbu Integrated has continued to focus on the development of linear constant current drive ICs since last year. Its general manager Chen Hengyu said that the company's self-developed high-order segmented linear constant current drive IC-SDS3108 has been acquired. A number of invention patents.
Chen Hengyu introduced, "This high-order segmentation technology uses N-type switches and P-type switches to cooperate with each other. The power efficiency can reach more than 93%, and the heat dissipation power is reduced by 60% compared with the four-stage linear constant current chip. The technical application of 'dynamic configuration' and 'active filling valley'.
Chen Hengyou believes that compared with switching power supply, linear constant current drive has the advantages of low cost, convenient installation, long lamp life and simple intelligent dimming. Therefore, linear drive will become an important trend in the development of LED industry.
Future to cost-driven
In the future, the competition in the LED industry is a battle for cost performance, and the continuous improvement of cost performance has become the goal of the entire LED industry chain. As the price of LED terminal products continues to decline, the proportion of LED driver ICs in the overall cost of lighting fixtures has become more and more prominent, driving chip manufacturers to compete to optimize the driving scheme to meet the low-cost requirements of related manufacturers.
According to Chen Hengyu, traditional power supplies include transformers, resistors, capacitors, etc. Since all components consume energy, the more peripheral components, the more energy the power supply consumes. “So under the premise of ensuring safety and stability, the fewer parts, the more energy-saving, the higher the integration, and the lower the cost.â€
In addition, the simplification of the peripheral circuit allows the drive power board to add heat dissipation to the LED luminaire, leaving more room for EMC. As a result, IC companies began to think about how to save some components in the application circuit to save production costs. However, the industry reminds that reducing the material cost of LED drive power must be based on the premise of not sacrificing performance and safety.
Dr. Yi Yangbo, deputy general manager of Xinpeng Microelectronics, said, “We don’t agree with the relevant driver IC companies to simply reduce the external component specifications, reduce the cost of protecting devices, etc., low-level cut corners will only bring the entire system. The risk of failure of control."
Yi Yangbo said that the solution can generally reduce the number of BOMs by integrating more devices into the IC, and reduce the built-in MOS internal resistance to increase the integrated power.
Based on this, Xinpeng Microelectronics introduced PN8316/8317, which is suitable for peripherally simplified medium-power non-isolated LED lighting. This series of ICs integrates 5N65 high-voltage MOS, and can share the same PCB board from 12-40W. Need to plug in the inductor / chip, that is, 90% of the components can be shared, the preparation is very convenient.
"Simple is strength. I think that the overall system of LED driver ICs in the future should be developed in the direction of cost-driven and simplification." Yi Yangbo said.
Toaster, is a commonly used kitchen supplies, mainly used to bake bread. A toaster usually includes a multi-functional oven, a heat-insulating surface, a special lifting device, etc. The more advanced also includes a separable breadcrumb chassis. The toaster is a heating appliance. Its function is to generate enough heat in the vicinity of the bread to bake the bread. If there is no pop-up toaster, breakfast will certainly not be so rich nowadays.
In many families, the toaster is more prone to failure than any other small home appliance. There are two reasons for this. First of all, the toe machine manufacturing costs are generally very low, its quality is not high. You can replace a new device with just $ 10.
Second, the toaster is often not a problem when their own failure, but the food particles interfere with its normal operation. If there are too many slices of bread on the bracket, they will fall into the bottom of the toaster and accumulate when the movement of the tray will move up, thus hindering the movement of the bracket, causing the heating element to short circuit, Open the device and affect the function of the spiral tube.
Most of the pop-up toasters are equipped with a large debris plate and have a door at the bottom, the reason for this. By sliding or opening the broken door, you can clean up the food particles that accumulate at the bottom of the toaster.
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