DC/DC Backlight LED Driver powers up to 6 strings in LCDs.
Press Release Summary:
Featuring 6 outputs individually capable of providing up to 50 mA of constant current, each device in second generation ALD6 series can drive 1-, 2-, 3-, or 6-string configurations of LEDs connected in series/parallel for backlighting LCDs. Dimming controls with resistive, analog, or PWM inputs provide smooth LED brightness transitions. Available in DIP or SMD packages that measure 23 x 21 mm, products operate from 10.8-13.2 Vdc and provide 25-38 Vdc output.
Original Press Release:
New Driver Powers up to Six Strings of LEDs for Backlighting LCD Displays
San Diego, CA - TDK-Lambda, a group company of TDK Corporation, 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, due to 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 50mA 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 300mA.
The ALD6 drivers operate with an input voltage of from 10.8 to 13.2VDC and provide an output voltage of 25V to 38VDC. These compact single package drivers are available in either DIP or SMD packages that measure about 23mm x 21mm (less than one square inch).
Other features include a Remote On/Off input and an LED Open Alarm that changes state if the drive current to any powered LED-string develop an open circuit. These drivers are convection cooled and designed to operate in ambient temperatures ranging from -30°C up to +80°C. The ALD6 can provide 0 to 100% brightness control when an external PWM signal is provided. The brightness will vary directly with the duty cycle of the PWM signal. A combination of external analog or resistive and PWM dimming controls can be accommodated.
The ALD6 Series are ideal for backlighting LCD displays, panels used in vending machines, industrial touch screens, POS terminals and programmable controllers, to name a few. These drivers are available now and priced at $27 in 1000 piece quantities. Detailed specifications are available at the following web link: http://www.us.tdk-lambda.com/lp/products/ald-series.htm
About TDK-Lambda
TDK-Lambda Americas, a group company of TDK Corporation, is a leading global electron-ics company that has been a major provider of power solutions for over 60 years. The company designs and manufactures a wide range of AC-DC and DC-DC power products for Medical, Industrial, Communications and Test & Measurement applications worldwide. For more information, call TDK-Lambda Americas directly at 619-575-4400 or visit the website at: http://www.us.tdk-lambda.com/lp
