What Are the Benefits of Solid-State LED 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 introduction of a variety of high-brightness LEDs in different colors and whites. These advancements have opened up new applications for LED lighting, moving beyond just being indicator lights. Previously, they were mostly used as indicators, but now, thanks to their declining costs and improving performance, they're replacing traditional light sources like incandescent and fluorescent bulbs in areas such as automotive and consumer electronics. Stable power supplies play a crucial role in maintaining consistent product quality. In the coming years, LED lighting will continue to expand into new solid-state solutions, offering additional programmability and flexibility for various lighting needs.
An LED is a low-voltage device with a forward voltage ranging from 2V to 4.5V depending on the color and current requirements. To maintain optimal brightness and color, LEDs need a continuous and stable current source. Additionally, a power conversion and control solution is necessary to adapt to a range of power sources, including AC, 12V automotive batteries, solar panels, DC power supplies, low-voltage AC systems, and even alkaline, nickel-based, or lithium-ion rechargeable batteries.
ON Semiconductor brings extensive expertise in both low-voltage and high-voltage technologies along with robust power management solutions. These capabilities are leveraged to tackle the challenges of solid-state lighting across diverse applications such as portable displays, automotive interior lighting, LED ballasts, architectural, industrial, automotive, and portable solutions. They offer a wide array of solid-state lighting solutions tailored to meet specific needs.
The NCL30288, introduced by ON Semiconductor, is a power factor corrected quasi-resonant primary current mode controller designed specifically for LED illumination. This controller 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, it achieves excellent efficiency. A novel control method enables precise regulation of constant LED current directly from the primary side, eliminating the need for secondary feedback circuits, biasing, or optocouplers. The device requires minimal external components and includes advanced safety features to simplify design while maintaining compactness and space savings.
Key features of the NCL30288 include primary feedback-based constant current control, high precision current regulation accuracy, power factor correction with low harmonic distortion, and line voltage feedforward for enhanced adjustment accuracy. It operates within a broad Vcc range and supports lockout and auto-recovery modes. The device offers secondary diode short-circuit protection, open and short-circuit LED protection, and operates over a wide temperature range (-40°C to +125°C) with 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 doesn’t require grading or trimming of LEDs during production, supports universal power applications (90-305V), and simplifies support for a broad LED forward voltage range. It also protects LED drivers from overheating under harsh conditions, offers flexibility in troubleshooting, and provides strong fault-handling capabilities for common LED system issues. The NCL30288 can be integrated into various LED driver electronics, including LED bulbs, power drivers, light engines, tubes, and system controls.
Following the acquisition of Fairchild in September 2016, ON Semiconductor has further enriched its LED lighting solutions. The FL7740 is a constant voltage primary regulation PWM controller designed for power factor correction. It boasts a wide universal input range (90VAC–305VAC) and delivers precise and stable CV regulation (within 3%) under steady-state conditions. Load transients are kept below 10%, minimizing voltage overshoot and undershoot during line and load changes.
For smart lighting applications using the FL774 phase, standby power remains under 0.3W even at 100mW load. When the PF optimizer is enabled, the power factor exceeds 0.9 even at half load, ensuring scalability across a wide range of output powers. An internal fast high-voltage startup circuit prevents overshoot, achieving a startup time of less than 0.2 seconds. At startup, the output voltage reaches the target CV level through loop gain conversion technology. Protection features such as overload, output diode short circuit, short and open circuit of inductive resistance, output short circuit, and overvoltage ensure system reliability.
ON Semiconductor’s latest LED power controller accelerates the development of LED-related products and guarantees product stability, making it an ideal choice for developers looking to innovate.
Tags: Advantages of Solid-State LED Lighting Solutions
In conclusion, solid-state LED lighting solutions offer numerous benefits, from energy efficiency and cost-effectiveness to versatility and adaptability. With ongoing technological advancements, they represent a sustainable future for lighting applications across multiple industries.
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