Release date: 2017-07-25 Source: China Power Grid Share: With the continuous development and advancement of LED technology, many different colors and white high-brightness LEDs have been jointly launched, and LED applications have been extended to various new markets. In the past, it was mainly used as an LED for the indicator light. As its cost is continuously reduced, its performance is further improved, enabling it to replace light sources such as incandescent lamps and fluorescent lamps in automotive applications and consumer electronics, including stable power supplies. Control ensures a stable product quality. In the next few years, LEDs will continue to be used in new solid-state lighting solutions, providing additional advantages in terms of programmability and flexibility for lighting applications. LED A low-voltage device that has a forward voltage of between 2V and 4.5V depending on the color and current required. LEDs require continuous and stable current to drive, ensuring their true brightness and desired color, and a solution for power conversion and control to match a variety of power sources, including AC, 12V. Automotive batteries, solar panels, DC power supplies or low-voltage AC systems, even with alkaline batteries, nickel-based batteries or rechargeable lithium-ion batteries. ON Semiconductor has many years of experience in low voltage and high voltage technology, as well as power management solutions, and these specialties are used to address the challenges faced by solid state lighting, whether it is portable display products, automotive interiors. Lighting or LED ballasts, as well as architectural, industrial, automotive and portable applications, offer a variety of solid-state lighting solutions. Introduced by ON Semiconductor, the NCL30288 is a power factor corrected quasi-resonant primary current mode controller for LED illumination. The NCL30288 is an AC-DC power supply for isolated and non-isolated buck-boost/SEPIC constant current LED drivers. Factor correction flyback controller. The controller operates in a quasi-resonant mode to provide optimum efficiency. Thanks to a novel control method, the device is able to tightly regulate a constant LED current from the primary. This eliminates the need for secondary feedback circuits, biasing, and optocouplers. The device has a very small number of peripheral components and built-in powerful security features to simplify the design. The device is designed for very compact, space-saving designs. The characteristics of the NCL30288 mainly include the constant current control capability with primary feedback, certain precision current regulation accuracy, and power factor correction capability with low harmonic distortion. Line voltage feedforward is used to enhance the adjustment accuracy and has a wide Vcc. The range of operation, with locking and auto-recovery versions, with secondary diode short-circuit protection, open and short-circuit LED protection, and a wide temperature range of -40 to 125C with very low startup current (typically 13A). Compared to other competing products, the NCL30288 has the advantage of not requiring optocouplers or secondary control circuits, and does not require grading LEDs or trimming for accuracy in production. Requires support for universal power applications (90-305V), simplifies support for LED forward voltage range, protects LED drivers from overheating under severe conditions, provides flexibility in troubleshooting, and has powerful fault handling capabilities It has a sound fault handling capability for common LED system faults and can support outdoor and high temperature environments. The NCL30288 can be used in integrated LED driver electronics such as LED bulbs, LED power drivers, LED light engines, LED tubes and LED system electronic controls. ON Semiconductor has completed the acquisition of Fairchild in September 2016, and enriched the LED lighting solution in the M&A process. The FL7740 is a constant voltage primary regulation PWM controller for power factor correction. The FL7740 has a wide universal input range (90VAC? 305VAC), providing accurate and stable CV regulation (less than 3%) at steady state, CV regulated load Transients are less than 10% with differential dynamics to minimize overshoot and undershoot of the output voltage under line and load transient conditions. For the intelligent lighting FL774 phase application, even under the condition of 100mW load, the standby power will be less than 0.3W, even under the condition of half load, the power factor will be higher than 0.9 when the PF optimizer is enabled, which can achieve wide output power. Scalability. Built-in fast high-voltage start-up circuit that does not overshoot, the startup time is less than 0.2 seconds, and the output voltage can reach the target CV level through loop gain conversion technology at startup. Various protection functions such as overload, output diode short circuit, short circuit and open circuit of induction resistance, output short circuit and over voltage can ensure the reliability of the system. The latest LED power controller from ON Semiconductor is able to accelerate the development of LED-related products and ensure the stability of the product, which will be one of the best choices when developing products. Tags: What are the advantages of LED solid-state lighting solutions?
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