In recent years, with the further popularization of LED public lighting at home and abroad, the rapid growth of outdoor lighting has been driven. According to its prediction, the global outdoor LED power supply will reach US$4.3 billion in 2015, which is in a good stage of rapid growth. However, the LED market research results show that in the third quarter of 2015, the price of China's LED outdoor lighting driver power supply market decreased by 25% compared with the same period of last year. In the fourth quarter, the price of the power supply market will further decline. The annual price decline will exceed 30%. In this regard, a number of LED power companies have expressed their attitude: This year is not a good day.
In fact, in addition to the impact of cost pressures and price declines, the survival environment of domestic power companies has deteriorated this year. Liu Haibo also believes that the current related companies are in the supply chain, technological innovation capabilities, after-sales service capabilities, etc. The aspect will also face many challenges. For example, first of all, there are many specifications of power supply products caused by many current specifications, many specifications of wire ends and joints, and various types of control methods. Secondly, the proportion of power supply costs to lighting costs is also increasing year by year. Third, people's quality requirements for products. It has become higher and higher, and the maintenance cost is high. The demand for quality is high. Finally, with the rise of smart cities everywhere, the industry's intelligence is gradually becoming a trend.
In addition, another domestic LED driver power research and development and production company Yu Sheng Electronics also pointed out that after years of continuous development, we can see that this year's LED industry competition has entered the "white-hot stage" and began to usher in a new round. Industry reshuffle, competition tends to rise to a higher level, a large wave of manufacturers will have to accept more serious survival challenges. It is reported that the LED power supply market has gradually matured to date, and there are thousands of LED power supply manufacturers on the market. The various LED power supplies produced are also varied, and the general trend of outdoor LED power supply cannot be avoided. bigger:
Further reduce costs
Like the electronics industry, LED power supply cost reduction is also a commonplace. Among them, components such as ICs and semiconductor power devices may also have a price reduction space, resulting in a reduction in BOM cost. However, other parts such as transformers, wires, radiators, and casings are subject to cost reductions due to material costs and rising labor costs. Under such circumstances, LED power supply wants to reduce costs, and can only improve management level in production, and carry out refined production, reduce various wastes, and improve yield. In product planning, it is necessary to strategically select the product types that have its own advantages, appropriately do “subtractionâ€, concentrate resources, and make products with economies of scale, thereby further reducing procurement, production and R&D costs. In terms of product development and design, it is necessary to improve the level and optimize the design to reduce BOM cost and production cost.
In addition, LED outdoor power supply can improve the working frequency by using FLYBACK, LLC, LCC, Boost PFC, BUCK and other topologies to reduce the volume of transformers and inductors, reduce the number of parts, and finally achieve the purpose of BOM. And try to use smaller devices to achieve efficiency and reliability. It is also possible to reduce the size of the EMC filter by optimizing its design. In the case of meeting the heat dissipation requirements, the size of the heat sink and the size of the overall structure of the power supply can also be reduced, thereby maximizing cost savings and exerting "extreme" cost control.
Further improve efficiency requirements
It is understood that as energy efficiency standards are implemented globally, end customers also have clear requirements for the efficiency of LED power supplies. Energy efficiency standards set the threshold for the market. Under the condition of cost control, improving power efficiency has become one of the most clear trends in the industry. How to improve efficiency, this is a rather complicated system engineering. First, enterprises can deeply understand the frequency impedance characteristics of X capacitors, Y capacitors, and filter inductors, and design filters with smaller line drops. Second, enterprises should improve their understanding of semiconductor power devices, rationally select models, and optimize the design of their peripheral drive circuits and absorption circuits to reduce the loss of power devices. Third, regarding the design of the transformer, how to achieve the optimal balance between copper loss and iron loss under a certain size, the enterprise also needs in-depth research and repeated experiments. For different input and output conditions, the enterprise must make a suitable choice in the selection of the previous topology scheme, which is the basic premise of efficiency improvement.
Further improve PF and THD requirements
PF (Power Facto) and THD (Total Harmonic Distortion) have a serious impact on the power quality of the power grid. Harmonics may cause resonance in the power grid, causing normal power supply interruption, accident expansion, and serious impact. Safety, stability and reliability to the grid. Therefore, countries around the world have also put forward more and more strict regulations on PF and THD. Among them, most of the customers are required to reach PF above 0.95, and some countries even propose THD less than 6%.
Differential mode and differential mode capacitors also have a large impact on the harmonics. Therefore, how to reduce the differential mode inductance and differential mode capacitance under the premise of meeting EMC requirements is also a big challenge for power supply manufacturers. Finally, choosing a suitable PFC control circuit to reduce THD is undoubtedly also critical.
Further improve power supply reliability
As one of the "pain points" in the LED power supply, the reliability of the power supply not only directly affects the life of the lamp and the cost of the customer, but also directly affects the reputation of the LED power supply company. Among them, excellent design, rigorous verification testing, material quality control, these are the guarantee of LED power supply reliability.
The cost of power is increasing the proportion of lighting costs year by year.
In fact, in addition to the impact of cost pressures and price declines, the survival environment of domestic power companies has deteriorated this year. Liu Haibo also believes that the current related companies are in the supply chain, technological innovation capabilities, after-sales service capabilities, etc. The aspect will also face many challenges. For example, first of all, there are many specifications of power supply products caused by many current specifications, many specifications of wire ends and joints, and various types of control methods. Secondly, the proportion of power supply costs to lighting costs is also increasing year by year. Third, people's quality requirements for products. It has become higher and higher, and the maintenance cost is high. The demand for quality is high. Finally, with the rise of smart cities everywhere, the industry's intelligence is gradually becoming a trend.
In addition, another domestic LED driver power research and development and production company Yu Sheng Electronics also pointed out that after years of continuous development, we can see that this year's LED industry competition has entered the "white-hot stage" and began to usher in a new round. Industry reshuffle, competition tends to rise to a higher level, a large wave of manufacturers will have to accept more serious survival challenges. It is reported that the LED power supply market has gradually matured to date, and there are thousands of LED power supply manufacturers on the market. The various LED power supplies produced are also varied, and the general trend of outdoor LED power supply cannot be avoided. bigger:
Further reduce costs
Like the electronics industry, LED power supply cost reduction is also a commonplace. Among them, components such as ICs and semiconductor power devices may also have a price reduction space, resulting in a reduction in BOM cost. However, other parts such as transformers, wires, radiators, and casings are subject to cost reductions due to material costs and rising labor costs. Under such circumstances, LED power supply wants to reduce costs, and can only improve management level in production, and carry out refined production, reduce various wastes, and improve yield. In product planning, it is necessary to strategically select the product types that have its own advantages, appropriately do “subtractionâ€, concentrate resources, and make products with economies of scale, thereby further reducing procurement, production and R&D costs. In terms of product development and design, it is necessary to improve the level and optimize the design to reduce BOM cost and production cost.
In addition, LED outdoor power supply can improve the working frequency by using FLYBACK, LLC, LCC, Boost PFC, BUCK and other topologies to reduce the volume of transformers and inductors, reduce the number of parts, and finally achieve the purpose of BOM. And try to use smaller devices to achieve efficiency and reliability. It is also possible to reduce the size of the EMC filter by optimizing its design. In the case of meeting the heat dissipation requirements, the size of the heat sink and the size of the overall structure of the power supply can also be reduced, thereby maximizing cost savings and exerting "extreme" cost control.
Further improve efficiency requirements
It is understood that as energy efficiency standards are implemented globally, end customers also have clear requirements for the efficiency of LED power supplies. Energy efficiency standards set the threshold for the market. Under the condition of cost control, improving power efficiency has become one of the most clear trends in the industry. How to improve efficiency, this is a rather complicated system engineering. First, enterprises can deeply understand the frequency impedance characteristics of X capacitors, Y capacitors, and filter inductors, and design filters with smaller line drops. Second, enterprises should improve their understanding of semiconductor power devices, rationally select models, and optimize the design of their peripheral drive circuits and absorption circuits to reduce the loss of power devices. Third, regarding the design of the transformer, how to achieve the optimal balance between copper loss and iron loss under a certain size, the enterprise also needs in-depth research and repeated experiments. For different input and output conditions, the enterprise must make a suitable choice in the selection of the previous topology scheme, which is the basic premise of efficiency improvement.
Further improve PF and THD requirements
PF (Power Facto) and THD (Total Harmonic Distortion) have a serious impact on the power quality of the power grid. Harmonics may cause resonance in the power grid, causing normal power supply interruption, accident expansion, and serious impact. Safety, stability and reliability to the grid. Therefore, countries around the world have also put forward more and more strict regulations on PF and THD. Among them, most of the customers are required to reach PF above 0.95, and some countries even propose THD less than 6%.
Differential mode and differential mode capacitors also have a large impact on the harmonics. Therefore, how to reduce the differential mode inductance and differential mode capacitance under the premise of meeting EMC requirements is also a big challenge for power supply manufacturers. Finally, choosing a suitable PFC control circuit to reduce THD is undoubtedly also critical.
Further improve power supply reliability
As one of the "pain points" in the LED power supply, the reliability of the power supply not only directly affects the life of the lamp and the cost of the customer, but also directly affects the reputation of the LED power supply company. Among them, excellent design, rigorous verification testing, material quality control, these are the guarantee of LED power supply reliability.
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