LED Driver Provides DOT Correction And Gray Scale Dimming

The LT3746 32-channel LED driver integrates a 55V step-down controller and delivers up to 30 mA per channel. Each channel includes six-bit dot-correction current adjustment and 12-bit grayscale PWM dimming. Other features include a 0.5-µs minimum LED on-time, 6V to 55V input range, adaptive LED bus voltage, cascadable 30-MHz serial data interface, and protection functions. Available in a 56-lead, 5 mm x 9 mm QFN package, price for the LT3746EUHH is $4.95 each/1,000. An extended-temperature version, the LT3746IUHH, starts at $5.45 each/1,000. LINEAR TECHNOLOGY CORP., Milpitas, CA. (800) 454-6327.