What Are the Benefits of LED Solid-State Lighting Solutions?
Date Published: July 25, 2017
Source: China Power Grid
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As LED technology continues to evolve, we’ve seen the emergence of various high-brightness LEDs in different colors and whites. These advancements have opened up new markets for LED applications beyond their traditional role as indicator lights. With declining costs and improved performance, LEDs are now being used to replace conventional lighting sources like incandescent and fluorescent bulbs in automotive and consumer electronics sectors. Stable power supplies play a key role in ensuring consistent product quality. In the coming years, LEDs will continue to drive innovation in solid-state lighting solutions, offering added benefits in programmability and adaptability for diverse lighting needs.
An LED is a low-voltage device that typically operates within a forward voltage range of 2V to 4.5V, depending on the color and current requirements. To maintain optimal brightness and color, LEDs need a continuous and stable current supply. This requires effective power conversion and control solutions compatible with a variety of power sources, including AC, 12V automotive batteries, solar panels, DC power supplies, or low-voltage AC systems—even common batteries like alkaline or lithium-ion cells.
ON Semiconductor boasts extensive expertise in both low-voltage and high-voltage technologies, along with robust power management solutions. These capabilities are leveraged to tackle the challenges in solid-state lighting across multiple domains, including portable displays, automotive interior lighting, LED ballasts, and architectural, industrial, automotive, and portable applications. Their offerings span a wide array of solid-state lighting solutions tailored to meet diverse needs.
The NCL30288, introduced by ON Semiconductor, is a power factor corrected quasi-resonant primary current mode controller designed specifically for LED illumination. It serves as an AC-DC power supply for isolated and non-isolated buck-boost/SEPIC constant current LED drivers and power factor correction flyback controllers. Operating in a quasi-resonant mode, this controller ensures maximum efficiency. By employing a novel control technique, it precisely regulates constant LED current from the primary side, eliminating the need for secondary feedback circuits, biasing, or optocouplers. With minimal external components and advanced built-in safety features, the design is simplified while maintaining compactness and space efficiency.
Key features of the NCL30288 include primary-side constant current control, precise current regulation accuracy, power factor correction with low harmonic distortion, and line voltage feedforward to enhance adjustment accuracy. It operates within a wide Vcc range and offers both lockout and auto-recovery modes, with protections against secondary diode short circuits, open and short-circuit LEDs, and supports a broad operating temperature range of -40°C to 125°C, featuring an exceptionally low startup current (typically 13µA).
Compared to competing products, the NCL30288 stands out by eliminating the need for optocouplers or secondary control circuits. It also doesn’t require grading or trimming LEDs during production. Supporting universal power applications (90-305V), it simplifies handling a wide range of LED forward voltages, protects drivers from overheating under extreme conditions, and provides flexibility in troubleshooting. Its strong fault-handling capabilities make it ideal for addressing common LED system faults and support outdoor and high-temperature environments. The NCL30288 is suitable for integrated LED driver electronics such as LED bulbs, power drivers, light engines, tubes, and system controls.
Following its acquisition of Fairchild in September 2016, ON Semiconductor expanded its LED lighting solutions portfolio. The FL7740 is a constant voltage primary regulation PWM controller designed for power factor correction. With a universal input range of 90VAC to 305VAC, it ensures accurate and stable CV regulation (less than 3%) under steady-state conditions, with CV load transients under 10%. Differential dynamics minimize output voltage overshoot and undershoot during line and load transients.
In smart lighting applications like FL774, the standby power remains below 0.3W even under 100mW loads, with a power factor exceeding 0.9 when the PF optimizer is enabled. This enables scalability across a wide range of output powers. A built-in fast high-voltage startup circuit prevents overshoot, achieving a startup time of less than 0.2 seconds. Output voltage reaches the target CV level using loop gain conversion technology at startup. Protection features such as overload, output diode short circuit, induction resistance short circuit and open circuit, output short circuit, and overvoltage ensure system reliability.
The latest LED power controller from ON Semiconductor accelerates the development of LED-related products and ensures product stability, making it one of the top choices for developers.
Tags: Advantages of LED Solid-State Lighting Solutions
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