Multioutput backlight LED drivers suit LCD displays
The ALD series multioutput dc/dc backlight LED drivers serve the steady migration from cold-cathode fluorescent backlighting of LCD displays to LED backlights. These drivers are specifically designed for LED backlighting of LCD displays that are now used in industrial and consumer applications. The series includes models for backlight LEDs arranged in two-, three-, and four-string configurations. The drivers feature dimming controls with resistive, analog or PWM inputs that provide LED brightness control. Each output provides up to 140-mA constant-current drive to backlight LEDs that can be connected in series and parallel configurations.
The LED drivers operate with an input voltage of from 10.8 to 13.2 Vdc and have a maximum open-circuit output voltage of 42 to 44 Vdc. The series are 5.0 to 5.5 mm thick and mount behind LCD screens. The two- and three-string models measure 21.5 x 85-mm, and the four-string drivers are 50 x 100 mm. The drivers feature remote on/off input and an overvoltage alarm output. They are convection cooled and operate in ambient temperatures ranging from –30° to 85°C without deratings. Typical operating efficiencies are 90%. The drivers suit backlighting LCD panels used in vending machines, industrial touchscreens, POS terminals, and programmable controllers. ($18.75 ea/1,000 — available now.)
TDK-Lambda Americas , San Diego , CA
Mel Berman 619-628-2859
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