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New High-Brightness LED Driver From National Semiconductor

National Semiconductor Corporation today introduced the industry's first common-anode, current-mode, high-brightness light-emitting diode (LED) driver with pulse-width modulation (PWM) dimming. The LM3433, a member of National's PowerWise(R) energy-efficient product family, drives high-power, high-brightness LEDs in backlighting, projector and solid-state lighting applications.

National's LM3433 LED driver opens the way for high-reliability LEDs to be used in large-screen liquid crystal display (LCD) television (TV) backlighting applications where a common anode approach offers a thermal advantage. In another example, LEDs can be used in today's shrinking "pocket projector" designs for a wider color gamut, higher reliability and longer life expectancy than the ultra-high performance (UHP) lamps used today.

Luminus' PhlatLight(TM) LEDs are a new class of LED for very high-brightness applications where a point source of light is needed. The PhlatLight RGB LED demonstration at National's booth will be capable of producing over 3,000 white lumens. "PhlatLight LEDs are being designed into a number of display and lighting applications," said John Langevin, vice president of sales and marketing at Luminus. "National's LM3433 driver provides a more complete solution for our customers, enabling use at the intended high performance levels that the PhlatLight chipsets were designed for."

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