LED Driver Claims Industry’s Best Dimming Performance

Offering what National is calling the industry’s best phase-based dimming performance, the LM3450 LED driver integrates active PFC and phase dimming decoding to provide uniform, flicker-free illumination across a wide, programmable dimming range. The integrated phase dimming decoder interprets the phase angle and remaps it to a 500-Hz PWM output to dim the LEDs. It uses programmable mapping from input to output to increase design flexibility and also features a dynamic filter and variable sampling rate. An integrated dynamic hold circuit ensures that the phase dimmer angle is decoded properly while minimizing the extra power losses associated with holding current. Available in a 16-pin TSSOP, price for the LM3450 is $1.85 each/1,000. NATIONAL SEMICONDUCTOR CORP., Santa Clara, CA. (800) 272-9959.