With the continuous advancement of LED technology, the introduction of many different colors and white high-brightness LEDs has expanded LED applications to various new markets. In the past, it was mainly used as an indicator light. As the cost of LEDs continued to decrease, the performance was further improved, enabling it to replace light sources such as incandescent lamps and fluorescent lamps in automotive applications and consumer electronics, including stable power supply control to ensure stability. Product quality With the continuous advancement of LED technology, the introduction of many different colors and white high-brightness LEDs has expanded LED applications to various new markets. In the past, LEDs, which were mainly used as indicator lights, have further improved their performance as LEDs have been reduced in cost, enabling them to replace light sources such as incandescent lamps and fluorescent lamps in automotive applications and consumer electronics, including smartphones and LCD TVs. LED lighting can be seen in both architectural lighting and general lighting. In the next few years, LEDs will continue to be used in new Solid State Lighting (SSL) solutions, offering more advantages in terms of programmability and flexibility for lighting applications. LEDs are low-voltage devices that can operate from less than 2V to 4.5V depending on the color and current required. In addition, LEDs require a constant current to drive to ensure their brightness and desired color, and require a power supply. Conversion and control solutions to match a variety of power sources, including AC, solar panels, 12V automotive batteries, DC power supplies or low voltage AC systems, even with alkaline, nickel-based or rechargeable Lithium Ion Battery. 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 NCL30288 features constant current control with primary feedback, accurate current regulation accuracy, power factor correction with low harmonic distortion, line voltage feedforward for enhanced regulation, and a wide Vcc operating range. Locked and automatically restored version features 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 an optocoupler or secondary control circuit, nor does it require grading of the LEDs or trimming for accuracy in production, and its specifications exceed the industry's requirements for lighting. It also supports universal power application (90-305V), which simplifies the support of LED forward voltage range, protects LED driver from overheating under severe conditions, has flexibility in fault handling, and has powerful fault handling capability. LED system faults have sound fault handling capabilities to 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. In September 2016, ON Semiconductor completed the acquisition of Fairchild and enriched its LED lighting solutions. 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 intelligent lighting applications, the FL7740 has a standby power of less than 0.3W under 100mW load conditions. Even under half load conditions, the power factor is higher than 0.9 when the PF optimizer is enabled, enabling 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 LED power controller introduced by ON Semiconductor can 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.
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