- 07 February, 2012
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UK Technology Day - 23 May, 2012
ElectroTestExpo
AnalogicTech has introduced the AAT1409/7/5 family of multi-string LED backlight drivers. Offering integrated boost converters and precision current sinks that can support up to 88 LEDs at 360mA total LED current, the AAT1409/7/5 drivers are among the most powerful currently in the marketplace and reduce the number of backlight PCBs. While reducing costs this new family is capable of driving high brightness LEDs and ensuring uniformity across the display by controlling the backlight intensity.
“As LCD displays continue to gain traction in the computing, consumer and industrial markets, features like power, efficiency, accuracy and flexibility of the backlight drivers are all critical differentiators,” said Ray Chan, technical marketing manager at AnalogicTech. “By offering a product family designed for a specific range of LCD panels – 10-inch to 22-inch in this case – we are able to offer a very powerful and effective approach to LCD power management.” The AAT1409/7/5 drivers operate from DC inputs, cigarette lighter adapters or multi-cell Li-ion batteries over the 4.5V to 26V range. The family is available in 8, 6 and 4 channels making them ideal for driving white LED (WLED) edge backlighting for LCD panels ranging from 10 to 22 inches in size. The drivers also support up to 100 kHz PWM dimming frequency to ensure silent operation. An additional consideration is that many portable LCD devices are battery-powered and operate under low ambient lighting conditions or in power saving modes, so require low level backlight dimming to extend battery run time. The AAT1409/7/5 addresses this with a design that maintains high efficiency during low PWM duty cycles to reduce wasted energy during light load conditions. The driver’s high resolution 1000:1 PWM dimming range delivers precise control of backlight brightness, equivalent to a 10-bit resolution.
