LED Drivers & LED Lighting Design | National Semiconductor — LED Drivers, LED Driver Circuit Design, LED Power Supply, TRIAC Dimmer, LMUs, RGB LED, White LED, High Brightness (HB) LED, Flash LED, Constant Current Source LED Supply, OLED Power Supply, LED Controller, WEBENCH LED Designer Tool
With higher efficiencies than incandescent bulbs and without the hazardous chemicals found in Cold Cathode Fluorescent Lamps (CCFL), LED lighting is gaining popularity as an environmentally friendly lighting solution.
Regardless of type, size, or power, all LEDs work best when driven with a constant current source supply since LED color changes with small variations in driving current. LEDs often support varying system voltages and forward voltages, which can further cause variations in LED brightness and color. National’s regulators provide the benefit of constant current source to single LEDs or arrays of LEDs, enabling color and brightness matching over a wide temperature range.
National’s LED drivers are ideal for both parallel and series configurations with features such as built-in current matching, high efficiencies, multiple dimming interfaces, and low total component count.
National’s PowerWise LED drivers such as the LM34xx/LM340x/LM35xx families offer a maximum power-to-performance ratio, which means you get more features than standard incandescent and fluorescent lighting solutions at a fraction of the wattage. Using National’s PowerWise LED drivers, results in energy-efficient solutions that reduce power consumption.
Solutions are provided from a range of power regulation technologies including integrated switch Buck, Boost, SEPIC, and Buck-Boost Regulators as well as Buck Hysteretic and Boost discrete MOSFET Controllers.
LM3464 - LED Driver with Dynamic Headroom Control and Thermal Control Interface
LM3424 - Common Anode Capable High Brightness LED Driver with High Frequency Dimming
Browse All LED Lighting App Notes & Technical Documents
TRIAC Dimming with the LM3445
National's industry-leading TRIAC dimmable offline LED driver solution is perfect for any application where an LED driver must interface to a standard triac wall dimmer. National’s new TRIAC dimmable LED driver delivers a wide, uniform dimming range free of flicker, best-in-class dimming performance, and high efficiency—all while maintaining ENERGY STAR® power factor requirements in a typical application.
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Application voltage range from 80 VAC to 270 VAC
Angle detector/decoder enables wide (100:1) full range dimming
Integrated 300Ω bleeder resistor to ensure proper TRIAC signal decoding
Patent-Pending control architecture allows for constant ripple current which extends the life of the LEDs
Scalable output current up to and greater than 1A
Master/Slave control for uniform dimming across multi-channel applications
Ideal dimming solution for MR16 & PAR20, PAR25, PAR30, PAR38 LED bulbs
WEBENCH LED Architect is a quick visual tool for complete lighting system design up to 100,000 lumens in output. LED performance, electronic drive current and heat compensation are balanced in seconds. The tool analyzes 350 of the latest LEDs from 12 leading manufacturers, 30 heat sinks, 35 LED drivers, and a library of 21,000 electronic passive components. Users can focus on system level results and leave the burden of complex electrical and thermal mathematics to the tool. Electrical simulation is included as an option for additional testing, validation or component selection.
