By TDK-Lambda Americas, Inc. 14
TDK-Lambda Americas has launched its second generation ALD6 series of multi-output DC-DC backlight LED drivers. The ALD6 was specifically designed for LCD displays that are increasingly migrating from cold cathode florescent (CCFL) backlighting to LEDs because of the improved brightness, higher efficiency and longer life that LEDs provide.
Each ALD6 device can be used to backlight LEDs arranged in 1, 2, 3, or 6 string configurations. The drivers feature wide-range dimming controls with resistive, analog, or PWM inputs that provide smooth LED brightness transitions. The ALD6 has six outputs, each of which can provide up to 50 mA of constant-current drive to strings of LEDs connected in series and/or parallel configurations for backlighting LCD displays. Therefore, for a single-string LED configuration, the combined output current jumps to 300 mA.
The ALD6 drivers operate with an input voltage of from 10.8 to 13.2 VDC and provide an output voltage of 25 to 38 VDC. These compact single package drivers are available in either DIP or SMD packages that measure about 23 x 21 mm (less than one square inch).