LED lighting design of the architecture of choice
LED lighting systems architecture of choice depends on your design goals is a low-cost, high-efficiency, or the smallest PCB area. In general, less than 25W of LED lighting system does not require power correction, so you can take a simple topology architecture, such as PSR or Buck topology. 25W-100W LED lighting applications require power correction, it is generally a single-stage PFC and quasi-resonant (QR) PWM flyback topology. More than 100W LED lighting applications generally use efficient LLC topology and two-stage PFC.
Less than 25W power LED lighting solutions the PSR or Buck topology can be used, mainly because this power range for small design, the emphasis on the simplicity of the design solutions for medium power (25W-100W) suitable for single-stage PFC quasi-resonant ( QR) PWM, flyback topology. SangCheolHer said, "high power solutions (> 100W) suitable LLC, QRPWM, flyback topology design. LLC and QR better performance from the point of view of efficiency; while PSR program without secondary feedback, simple design, small size than other programs. "
Cheng Chung also said: "the main applications of less than 25W LED lamps in interior lighting, they are mainly low-cost flyback topology. Transformation of ON Semiconductor NCP1015 and NCP1027 monolithic IC integrates a built-in high-voltage MOSFET and PWM controller can effectively reduce PCB area and the volume of the lamps, 25W maximum power output (230VAC input). "
For non-isolated to less than 25WLED lighting applications, if the input to the output conversion ratio is low, so simple buck converter can be the choice of a low-cost and small size. Isolated valued efficiency topology architecture, like the British quasi-resonant flyback topology of the the Feiling CoolSETICE2QS series devices is a good choice,. "AlexanderSommer said. Infineon is the first company to offer digital quasi-resonant flyback controller IC suppliers.
25W-100W power range typical LED lighting applications, street lighting (district roads) and in public places such as parking. Power conversion efficiency, cost-effective implementation of PFC function and high color quality is the most important of the three major technical challenge. For example, commercial lighting and street lighting applications, longer service life and lower maintenance costs resulting is helping to overcome the higher initial cost of entry barriers. 25W to 100W LED lighting led products applications power factor requirements, and therefore need to increase the power factor correction circuit.
"This circuit can be used to the traditional two-stage structure, the active non-continuous mode power factor correction (PFC) circuit plus the DC-DCPWM transform circuit, such as power factor correction controller ON NCP1607, NCP1607 the external circuit is very simple and can provide a good performance. "Zheng were before", it is recommended for high efficiency, low cost and small size LED program is a single-stage PFC circuit, it can achieve low-voltage DC output of the power factor and isolation and has significant cost advantages, will become the mainstream of the medium-power LED lighting program. Semiconductor NCP1652 for the realization of a single-stage PFC circuit provides optimum control program. "
Shenzhen Secom Telecom is using SiliconLabs the C8051F3XX series of 8-bit MCU by way of software to achieve PFC. The company's assistant market manager Huang Feng Sun said: "We for the home city electric (180V-260V) input 10W-30W low power LED lighting applications to develop the all-digital LED lighting solutions, available software control mode to achieve the PFC values up to 0.95. compared with hardware PFC, the software program in the premise of ensuring the same performance, but also has a higher flexibility, adaptability and scalability The program uses LED drive maximum output current of the MIC3230 350mA, up to 12 1W LEDs can be driven well positioned to meet the needs of indoor lighting.
AlexanderSommer said: "For the 25W-100W power efficiency and performance in a very wide input and / or load range (such as dimming) LED lighting led distributor applications, it is recommended that the use of quasi-resonant flyback topology with a separate PFC stage structure. typical efficiency of up to 90% can be achieved. "
100W or more applications, including the main road and highway lighting (It should be up to 20K lumens brightness or more, and a 250W power supply input) and professional applications, such as stage lighting and architectural floodlighting. A key driving force in high-power applications using E14 led reliability and low power consumption of the low cost of ownership. For example, the system efficiency can be compared with a metal halide and low pressure sodium lamps. The initial cost is more likely to continue in the short term barriers to entry in the market.
Less than 25W power LED lighting solutions the PSR or Buck topology can be used, mainly because this power range for small design, the emphasis on the simplicity of the design solutions for medium power (25W-100W) suitable for single-stage PFC quasi-resonant ( QR) PWM, flyback topology. SangCheolHer said, "high power solutions (> 100W) suitable LLC, QRPWM, flyback topology design. LLC and QR better performance from the point of view of efficiency; while PSR program without secondary feedback, simple design, small size than other programs. "
Cheng Chung also said: "the main applications of less than 25W LED lamps in interior lighting, they are mainly low-cost flyback topology. Transformation of ON Semiconductor NCP1015 and NCP1027 monolithic IC integrates a built-in high-voltage MOSFET and PWM controller can effectively reduce PCB area and the volume of the lamps, 25W maximum power output (230VAC input). "
For non-isolated to less than 25WLED lighting applications, if the input to the output conversion ratio is low, so simple buck converter can be the choice of a low-cost and small size. Isolated valued efficiency topology architecture, like the British quasi-resonant flyback topology of the the Feiling CoolSETICE2QS series devices is a good choice,. "AlexanderSommer said. Infineon is the first company to offer digital quasi-resonant flyback controller IC suppliers.
25W-100W power range typical LED lighting applications, street lighting (district roads) and in public places such as parking. Power conversion efficiency, cost-effective implementation of PFC function and high color quality is the most important of the three major technical challenge. For example, commercial lighting and street lighting applications, longer service life and lower maintenance costs resulting is helping to overcome the higher initial cost of entry barriers. 25W to 100W LED lighting led products applications power factor requirements, and therefore need to increase the power factor correction circuit.
"This circuit can be used to the traditional two-stage structure, the active non-continuous mode power factor correction (PFC) circuit plus the DC-DCPWM transform circuit, such as power factor correction controller ON NCP1607, NCP1607 the external circuit is very simple and can provide a good performance. "Zheng were before", it is recommended for high efficiency, low cost and small size LED program is a single-stage PFC circuit, it can achieve low-voltage DC output of the power factor and isolation and has significant cost advantages, will become the mainstream of the medium-power LED lighting program. Semiconductor NCP1652 for the realization of a single-stage PFC circuit provides optimum control program. "
Shenzhen Secom Telecom is using SiliconLabs the C8051F3XX series of 8-bit MCU by way of software to achieve PFC. The company's assistant market manager Huang Feng Sun said: "We for the home city electric (180V-260V) input 10W-30W low power LED lighting applications to develop the all-digital LED lighting solutions, available software control mode to achieve the PFC values up to 0.95. compared with hardware PFC, the software program in the premise of ensuring the same performance, but also has a higher flexibility, adaptability and scalability The program uses LED drive maximum output current of the MIC3230 350mA, up to 12 1W LEDs can be driven well positioned to meet the needs of indoor lighting.
AlexanderSommer said: "For the 25W-100W power efficiency and performance in a very wide input and / or load range (such as dimming) LED lighting led distributor applications, it is recommended that the use of quasi-resonant flyback topology with a separate PFC stage structure. typical efficiency of up to 90% can be achieved. "
100W or more applications, including the main road and highway lighting (It should be up to 20K lumens brightness or more, and a 250W power supply input) and professional applications, such as stage lighting and architectural floodlighting. A key driving force in high-power applications using E14 led reliability and low power consumption of the low cost of ownership. For example, the system efficiency can be compared with a metal halide and low pressure sodium lamps. The initial cost is more likely to continue in the short term barriers to entry in the market.
cpbay - 12. Dez, 10:22
