LEDs require a circuit driver to convert a standard AC voltage into a usable DC current and voltage.
In order for LED bulbs to be compatible with standard luminaires without sacrificing their operational life, designers must integrate the driver circuit with the bulb in a way that does not increase the potential failure mechanism of the bulb.
The drive circuit converts the high AC voltage to a low DC voltage, so electrical isolation is necessary. One solution is to use real-time waveform analysis to detect the LED current through the primary side of the isolation transformer so that strict constant current regulation of the LED string can be maintained without direct feedback from the output.
The two-step scheme for driving the LEDs is to use a boost converter on the front to provide the required load impedance for the dimmer and to make the input current in phase with the line current, thereby increasing the overall power factor of the circuit. Led table lamp, also known as solid-state lighting, is the third-generation lighting technology after incandescent lamp and fluorescent lamp. It has the characteristics of energy saving, environmental protection, safety and reliability. The solid-state light source is a new type of product with great potential to replace traditional lighting equipment in the next ten years. Light source, representing the future of lighting technology. The development of new solid-state lighting is not only a revolution in the field of lighting, but also meets the requirements of the current government to build a resource-conserving and environment-friendly society.
Governments around the world have introduced regulations requiring the phasing out of incandescent lamps, which has driven the transition to solid-state lighting technology. LED lighting has significant advantages over traditional methods, especially LED bulbs that increase lumen performance per watt and reduce the cost per lumen.
The main benefits of LED technology over the replacement of traditional incandescent lamps are longer working life and lower operating costs per watt hour. The robustness of solid-state lighting technology is an important selling point for consumers compared to relatively fragile incandescent and fluorescent lamps. The typical life of an incandescent lamp is approximately 1000 hours. The LED bulb claims to have a working life of more than 50,000 hours, and at the same time the equivalent light output, the power consumption is only about 20% of the former.
However, if the designer does not take the necessary precautions, LED lighting may not be able to honor the consumer's commitment to replace the bulb for about 25 years. The complexity and reliability of LEDs and their drive circuits are issues that designers must consider to achieve the longest operating life of LED lighting systems.
The normal operation of the LED requires a constant DC current, and the voltage is much lower than the rectified AC line voltage, so it is necessary to reduce the standard AC voltage to a usable level of the drive circuit. To make an LED bulb compatible with a standard light port, the designer must integrate the driver circuit into the lamp. If not handled properly, this integration increases the likelihood of mechanical failure of the LED bulb.
Previous LED bulb drivers required a large number of external components, high-priced isolation components, and special design strategies to prevent long-term aging of critical components. The led desk lamp is a desk lamp that uses LEDs or light-emitting diodes as a light source. LED is a solid-state semiconductor device that can directly convert electricity into light. The LED lighting technology used is the third generation lighting technology. The use of blue light from LED desk lamps can cause eye damage, but it also has a number of advantages. Now, the integration of the driver circuit makes the lamp more prone to reliability problems, such as early failure or a drop in the MTTF rate.
The MTTF is a measure of the time to first failure and is usually calculated as the FIT rate of each component in the circuit. Since the driver circuit is required to reduce the large AC voltage to a dc voltage that can power the LED, electrical isolation is required for safety reasons.
In a typical electrically isolated AC/DC converter, a discrete optical isolator is used to provide feedback from the secondary side to the primary side controller, which converts an electrical signal into an optical signal that passes the light barrier. Then convert back to the electrical signal. Since the FIT ratio of the optocoupler is higher than that of the semiconductor component, the MTTF specification of the entire circuit is lowered.
In addition, due to the effects of aging, the current transfer rate of the optocoupler may change with time and temperature. This change affects the loop stability of the power supply (the device that supplies power to the electronic device) and shortens the life of the LED drive circuit. While many LED lights and fixtures can operate at high PCB temperatures, designers must eliminate these weaknesses to achieve longer life.
2 shows the company's primary side digital control technology PrimAccurate. This patented solution uses real-time waveform analysis to detect the LED current through the primary side of the isolation transformer without the need for direct feedback from the output while maintaining a constant constant current to the LED string. Adjustment. The led desk lamp is a desk lamp that uses LEDs or light-emitting diodes as a light source. LED is a solid-state semiconductor device that can directly convert electricity into light. The LED lighting technology used is the third generation lighting technology. The use of blue light from LED desk lamps can cause eye damage, but it also has a number of advantages.
Another benefit of this technology is the internal feedback loop compensation, which simplifies the design and reduces the number of external components. In particular, it does not require optocouplers, which have the highest FIT ratio, which improves the reliability of the LED driver circuit. The overall reliability of the bulb.
led grow light
led grow lights
In order for LED bulbs to be compatible with standard luminaires without sacrificing their operational life, designers must integrate the driver circuit with the bulb in a way that does not increase the potential failure mechanism of the bulb.
The drive circuit converts the high AC voltage to a low DC voltage, so electrical isolation is necessary. One solution is to use real-time waveform analysis to detect the LED current through the primary side of the isolation transformer so that strict constant current regulation of the LED string can be maintained without direct feedback from the output.
The two-step scheme for driving the LEDs is to use a boost converter on the front to provide the required load impedance for the dimmer and to make the input current in phase with the line current, thereby increasing the overall power factor of the circuit. Led table lamp, also known as solid-state lighting, is the third-generation lighting technology after incandescent lamp and fluorescent lamp. It has the characteristics of energy saving, environmental protection, safety and reliability. The solid-state light source is a new type of product with great potential to replace traditional lighting equipment in the next ten years. Light source, representing the future of lighting technology. The development of new solid-state lighting is not only a revolution in the field of lighting, but also meets the requirements of the current government to build a resource-conserving and environment-friendly society.
Governments around the world have introduced regulations requiring the phasing out of incandescent lamps, which has driven the transition to solid-state lighting technology. LED lighting has significant advantages over traditional methods, especially LED bulbs that increase lumen performance per watt and reduce the cost per lumen.
The main benefits of LED technology over the replacement of traditional incandescent lamps are longer working life and lower operating costs per watt hour. The robustness of solid-state lighting technology is an important selling point for consumers compared to relatively fragile incandescent and fluorescent lamps. The typical life of an incandescent lamp is approximately 1000 hours. The LED bulb claims to have a working life of more than 50,000 hours, and at the same time the equivalent light output, the power consumption is only about 20% of the former.
However, if the designer does not take the necessary precautions, LED lighting may not be able to honor the consumer's commitment to replace the bulb for about 25 years. The complexity and reliability of LEDs and their drive circuits are issues that designers must consider to achieve the longest operating life of LED lighting systems.
The normal operation of the LED requires a constant DC current, and the voltage is much lower than the rectified AC line voltage, so it is necessary to reduce the standard AC voltage to a usable level of the drive circuit. To make an LED bulb compatible with a standard light port, the designer must integrate the driver circuit into the lamp. If not handled properly, this integration increases the likelihood of mechanical failure of the LED bulb.
Previous LED bulb drivers required a large number of external components, high-priced isolation components, and special design strategies to prevent long-term aging of critical components. The led desk lamp is a desk lamp that uses LEDs or light-emitting diodes as a light source. LED is a solid-state semiconductor device that can directly convert electricity into light. The LED lighting technology used is the third generation lighting technology. The use of blue light from LED desk lamps can cause eye damage, but it also has a number of advantages. Now, the integration of the driver circuit makes the lamp more prone to reliability problems, such as early failure or a drop in the MTTF rate.
The MTTF is a measure of the time to first failure and is usually calculated as the FIT rate of each component in the circuit. Since the driver circuit is required to reduce the large AC voltage to a dc voltage that can power the LED, electrical isolation is required for safety reasons.
In a typical electrically isolated AC/DC converter, a discrete optical isolator is used to provide feedback from the secondary side to the primary side controller, which converts an electrical signal into an optical signal that passes the light barrier. Then convert back to the electrical signal. Since the FIT ratio of the optocoupler is higher than that of the semiconductor component, the MTTF specification of the entire circuit is lowered.
In addition, due to the effects of aging, the current transfer rate of the optocoupler may change with time and temperature. This change affects the loop stability of the power supply (the device that supplies power to the electronic device) and shortens the life of the LED drive circuit. While many LED lights and fixtures can operate at high PCB temperatures, designers must eliminate these weaknesses to achieve longer life.
2 shows the company's primary side digital control technology PrimAccurate. This patented solution uses real-time waveform analysis to detect the LED current through the primary side of the isolation transformer without the need for direct feedback from the output while maintaining a constant constant current to the LED string. Adjustment. The led desk lamp is a desk lamp that uses LEDs or light-emitting diodes as a light source. LED is a solid-state semiconductor device that can directly convert electricity into light. The LED lighting technology used is the third generation lighting technology. The use of blue light from LED desk lamps can cause eye damage, but it also has a number of advantages.
Another benefit of this technology is the internal feedback loop compensation, which simplifies the design and reduces the number of external components. In particular, it does not require optocouplers, which have the highest FIT ratio, which improves the reliability of the LED driver circuit. The overall reliability of the bulb.
led grow light
led grow lights
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