After years of technological development and market cultivation, the LED industry has gradually been recognized by end consumers, but as an indoor lighting product for consumer products, price is an important factor affecting its development. As one of the core components, the driving Power Supply accounts for 20%-30% of the total cost of LEDs. As the price of devices and lighting products declines, it also brings price reduction pressure to the driving power supply.
The drive power is also a short board of LED lamps. According to industry insiders, 99 out of 100 broken lamps are caused by problems with the driving power supply. The short board of the driving power supply is also the electrolytic capacitor.
The actual service life of LED lighting products is far lower than the theoretical value, and the root cause is the failure of the driving power supply. Eliminating complexity, power supply assembly process, error-prone, and complicated process means more manpower and material resources and higher product cost, resulting in a decrease in reliability and stability.
Under the dual pressure of cost and quality, a new driving method "de-energization technology" came into being. "De-powering" can not be understood as no need to drive, not to "electric", but to cancel the influence of power supply. Part of the life of the device. On the one hand, the technical route of electroless capacitors and de-energization can solve the problem that electrolytic capacitors affect the life of the power supply, and on the other hand, the overall cost of the power supply can be further reduced.
The development of LED drive power follows the development of lamp bead, and the development of drive power is affected by the heat sink kit material. When various high thermal insulation materials are widely used in LED, it gives a new opportunity for power development, although non-isolated power supply and Traditional isolated power supplies have fans, but in the era of high cost performance, some people say that the new generation of special topology AC-LED light source production technology that can directly drive light by AC (AC) is becoming more and more mature, and will create LED lighting technology. Another new era.
"De-powered" drive technology leads the new trend in the LED lighting market
The LED light source is a long-life light source with a theoretical life of up to 50,000 hours. However, the application circuit design is unreasonable, the circuit components are not properly selected, and the LED light source is not well cooled, which will affect its service life. Especially in the application circuit, the electrolytic capacitor, which is the output filter of the AC/DC rectifier bridge, has a service life of less than 5,000 hours. This has become a roadblock for manufacturing long-life LED luminaire technology, which can be designed and produced in the application circuit. A new generation of LED driver ICs that eliminate electrolytic capacitors is a viable solution.
At present, the design ideas for power supply are mainly AC-LED and HV-LED. AC-LEDs are also designed with LEDs for their rectifier bridges. The rectifier bridges are also part of the illumination. The advantage is that the size can be designed to be small.
The difference between HV-LED and AC-LED is that the rectifier bridge is not in the design range of the light source. In the luminaire design, the mature rectifier bridge part can be greatly reduced, which can greatly reduce the design cost. Compared with LV-LEDs, HV-LEDs do not require power conversion, and drive efficiency and circuit design are greatly simplified.
At present, foreign markets are dominated by SEOUL SEMICONDUCTOR and Lynk Labs' AC-LED driver IC engine technology. Texas Instruments has also extended their products to the LED driver field and introduced a new AC- LED driver ICs are designed to simplify engines based on AC-LED drive technology.
Although the market share of domestically applied AC-LED driver chips is not high at present, it is only about 10%. However, with the development of foreign IC giants in the development and investment of AC-LED driver chips, Chen Heng, general manager of the company, said Within two years, 80-90% of LED industry companies will adopt AC-LED IC driver solutions.
With the maturity and cost reduction of high-voltage integrated lamp beads and COB technology, de-energized drive technology will usher in her spring!
Simple and easy to use
Based on the development trend of the driver IC market and technological innovations, SDS3108 series high-order segmented AC-LED driver ICs were introduced. On the basis of inheriting the inherent advantages of high-voltage linear constant current, the power supply indicators are raised to or exceed the level of Switching Power Supply, and completely overcome the problem of 100Hz stroboscopic and low wick utilization, and for the first time in the industry will be linear constant current drive The power is increased to 25W.
The de-energized product introduced by Ming Microelectronics is SM2087. SM2087 is a high power factor, segmented linear constant current LED driver chip, suitable for LED engine such as light engine and HV-COB-LED.
Adopting the patented technology of Mingwei Electronic Constant Current Control, it can realize the system characteristics of constant current precision less than ±5%, efficiency greater than 90%, power factor greater than 0.98 and harmonic less than 20% without transformer, inductor and high voltage electrolytic capacitor. The output current can be adjusted by an external resistor, which is easy to mass-produce, and has various protection functions such as over-temperature.
Zhao Chunbo, deputy manager of Mingwei Electronics Marketing Department, introduced the two typical applications of SM2087 to the reporter. The first one is the high-voltage integrated lamp bead and light engine solution. Under the 220Vac mains input condition, the 7W bulb lamp scheme only needs 28 9V. High-voltage integrated lamp beads eliminate the need for high-voltage electrolytic capacitors and eliminate the need for transformers and inductors. The SM2087 shares an aluminum substrate with a high-voltage integrated lamp bead, making it easy to mass-produce. It is a non-powered light engine solution.
The second is to integrate SM2087 and LED lamp bead in a COB light source. The LED lamp realizes complete powerless. The HV-COB-LED can be directly connected to the mains and can be used in various LED lamps. To make LED lighting easier and last longer. Again, this application features high power factor, low THD, and high efficiency.
The development of switching power supply has reached the limit, and its cost can no longer be lowered. Chen Hengyu talks about the photoelectric engine architecture of the butterfly's AC-LED driver IC. Taking the lamp tube as an example, the cost of the whole lamp will drop by about 30%. In addition, based on mechanized production, the defect rate will be greatly reduced. With fully automated patch production, the production capacity and production cost of the photoelectric engine will be greatly reduced.
Since the light engine simplifies the external interface, for example, for the bulb lamp and the ceiling lamp, the external electrical interface is two 220V power cables, and the external mechanical interface is three screws fixed to the heat sink, and at the same time, because the interface is simple, it is convenient for standardization, The application manufacturer's requirements are extremely low, simplifying the production process and reducing production costs. Finally, the power board was removed, reducing BOM costs.
Because the de-energized driver IC has many advantages such as mass production, easy production, simple circuit, and improved reliability, Zhao Chunbo said that the power-driven drive technology will have an advantage in the small power market.
Technical defect
Although there are various advantages in the de-energized drive technology, Huang Lulian, the general manager of Longmeiya, who has been in the LED industry for many years, has reservations about the de-energized drive technology. At present, the domestic standards are missing, if these capacitors are not used according to international export standards. Unable to pass safety, EMI, high-speed harmonic testing.
The industry generally believes that there are two congenital defects in the power-driven drive technology, heat dissipation problems and grid fluctuations, affecting the output rate. Although the LED power driver solution using the electroless capacitor solution solves the problem of the life of the LED lighting fixture, the lack of a capacitor, the energy storage component, cannot function as a stable voltage, but relies on components such as ICs. Dealing with the interference of unstable factors such as pulses and burrs in the power grid, there will be many unstable factors in the whole LED luminaire.
Peng Fuwen, deputy general manager of Huaquan Electric, said that the biggest advantage of the power-driven drive technology is that it is low-cost, but it cannot be used in high-end places due to its weak surge resistance, output ripple and failure to pass EMC tests. .
Even though this technology currently has various drawbacks, it can still be applied in some occasions where the requirements for lamps are not high. The secluded project is well-understood and confident in the engineering site environment, and the civil occasions, so Delip product manager Pu admitted that the power-driven drive technology will impact the non-isolated power supply in the civilian market.
The drive power is also a short board of LED lamps. According to industry insiders, 99 out of 100 broken lamps are caused by problems with the driving power supply. The short board of the driving power supply is also the electrolytic capacitor.
The actual service life of LED lighting products is far lower than the theoretical value, and the root cause is the failure of the driving power supply. Eliminating complexity, power supply assembly process, error-prone, and complicated process means more manpower and material resources and higher product cost, resulting in a decrease in reliability and stability.
Under the dual pressure of cost and quality, a new driving method "de-energization technology" came into being. "De-powering" can not be understood as no need to drive, not to "electric", but to cancel the influence of power supply. Part of the life of the device. On the one hand, the technical route of electroless capacitors and de-energization can solve the problem that electrolytic capacitors affect the life of the power supply, and on the other hand, the overall cost of the power supply can be further reduced.
The development of LED drive power follows the development of lamp bead, and the development of drive power is affected by the heat sink kit material. When various high thermal insulation materials are widely used in LED, it gives a new opportunity for power development, although non-isolated power supply and Traditional isolated power supplies have fans, but in the era of high cost performance, some people say that the new generation of special topology AC-LED light source production technology that can directly drive light by AC (AC) is becoming more and more mature, and will create LED lighting technology. Another new era.
"De-powered" drive technology leads the new trend in the LED lighting market
The LED light source is a long-life light source with a theoretical life of up to 50,000 hours. However, the application circuit design is unreasonable, the circuit components are not properly selected, and the LED light source is not well cooled, which will affect its service life. Especially in the application circuit, the electrolytic capacitor, which is the output filter of the AC/DC rectifier bridge, has a service life of less than 5,000 hours. This has become a roadblock for manufacturing long-life LED luminaire technology, which can be designed and produced in the application circuit. A new generation of LED driver ICs that eliminate electrolytic capacitors is a viable solution.
At present, the design ideas for power supply are mainly AC-LED and HV-LED. AC-LEDs are also designed with LEDs for their rectifier bridges. The rectifier bridges are also part of the illumination. The advantage is that the size can be designed to be small.
The difference between HV-LED and AC-LED is that the rectifier bridge is not in the design range of the light source. In the luminaire design, the mature rectifier bridge part can be greatly reduced, which can greatly reduce the design cost. Compared with LV-LEDs, HV-LEDs do not require power conversion, and drive efficiency and circuit design are greatly simplified.
At present, foreign markets are dominated by SEOUL SEMICONDUCTOR and Lynk Labs' AC-LED driver IC engine technology. Texas Instruments has also extended their products to the LED driver field and introduced a new AC- LED driver ICs are designed to simplify engines based on AC-LED drive technology.
Although the market share of domestically applied AC-LED driver chips is not high at present, it is only about 10%. However, with the development of foreign IC giants in the development and investment of AC-LED driver chips, Chen Heng, general manager of the company, said Within two years, 80-90% of LED industry companies will adopt AC-LED IC driver solutions.
With the maturity and cost reduction of high-voltage integrated lamp beads and COB technology, de-energized drive technology will usher in her spring!
Simple and easy to use
Based on the development trend of the driver IC market and technological innovations, SDS3108 series high-order segmented AC-LED driver ICs were introduced. On the basis of inheriting the inherent advantages of high-voltage linear constant current, the power supply indicators are raised to or exceed the level of Switching Power Supply, and completely overcome the problem of 100Hz stroboscopic and low wick utilization, and for the first time in the industry will be linear constant current drive The power is increased to 25W.
The de-energized product introduced by Ming Microelectronics is SM2087. SM2087 is a high power factor, segmented linear constant current LED driver chip, suitable for LED engine such as light engine and HV-COB-LED.
Adopting the patented technology of Mingwei Electronic Constant Current Control, it can realize the system characteristics of constant current precision less than ±5%, efficiency greater than 90%, power factor greater than 0.98 and harmonic less than 20% without transformer, inductor and high voltage electrolytic capacitor. The output current can be adjusted by an external resistor, which is easy to mass-produce, and has various protection functions such as over-temperature.
Zhao Chunbo, deputy manager of Mingwei Electronics Marketing Department, introduced the two typical applications of SM2087 to the reporter. The first one is the high-voltage integrated lamp bead and light engine solution. Under the 220Vac mains input condition, the 7W bulb lamp scheme only needs 28 9V. High-voltage integrated lamp beads eliminate the need for high-voltage electrolytic capacitors and eliminate the need for transformers and inductors. The SM2087 shares an aluminum substrate with a high-voltage integrated lamp bead, making it easy to mass-produce. It is a non-powered light engine solution.
The second is to integrate SM2087 and LED lamp bead in a COB light source. The LED lamp realizes complete powerless. The HV-COB-LED can be directly connected to the mains and can be used in various LED lamps. To make LED lighting easier and last longer. Again, this application features high power factor, low THD, and high efficiency.
The development of switching power supply has reached the limit, and its cost can no longer be lowered. Chen Hengyu talks about the photoelectric engine architecture of the butterfly's AC-LED driver IC. Taking the lamp tube as an example, the cost of the whole lamp will drop by about 30%. In addition, based on mechanized production, the defect rate will be greatly reduced. With fully automated patch production, the production capacity and production cost of the photoelectric engine will be greatly reduced.
Since the light engine simplifies the external interface, for example, for the bulb lamp and the ceiling lamp, the external electrical interface is two 220V power cables, and the external mechanical interface is three screws fixed to the heat sink, and at the same time, because the interface is simple, it is convenient for standardization, The application manufacturer's requirements are extremely low, simplifying the production process and reducing production costs. Finally, the power board was removed, reducing BOM costs.
Because the de-energized driver IC has many advantages such as mass production, easy production, simple circuit, and improved reliability, Zhao Chunbo said that the power-driven drive technology will have an advantage in the small power market.
Technical defect
Although there are various advantages in the de-energized drive technology, Huang Lulian, the general manager of Longmeiya, who has been in the LED industry for many years, has reservations about the de-energized drive technology. At present, the domestic standards are missing, if these capacitors are not used according to international export standards. Unable to pass safety, EMI, high-speed harmonic testing.
The industry generally believes that there are two congenital defects in the power-driven drive technology, heat dissipation problems and grid fluctuations, affecting the output rate. Although the LED power driver solution using the electroless capacitor solution solves the problem of the life of the LED lighting fixture, the lack of a capacitor, the energy storage component, cannot function as a stable voltage, but relies on components such as ICs. Dealing with the interference of unstable factors such as pulses and burrs in the power grid, there will be many unstable factors in the whole LED luminaire.
Peng Fuwen, deputy general manager of Huaquan Electric, said that the biggest advantage of the power-driven drive technology is that it is low-cost, but it cannot be used in high-end places due to its weak surge resistance, output ripple and failure to pass EMC tests. .
Even though this technology currently has various drawbacks, it can still be applied in some occasions where the requirements for lamps are not high. The secluded project is well-understood and confident in the engineering site environment, and the civil occasions, so Delip product manager Pu admitted that the power-driven drive technology will impact the non-isolated power supply in the civilian market.
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