Aug 19 2010
Developer of semiconductor system solutions, Advanced Analogic Technologies has unveiled the AAT1409/7/5 series of LED backlight drivers.
The multi-string LED drivers provide integrated precision current sinks and boost converters that has the ability to support a maximum of 88 LEDs at a total LED current of 360mA. The drivers decrease the quantity of backlight PCBs and ensure uniformity across the LED display by controlling the intensity of the backlight accurately.
The AAT1409/7/5 LED drivers function from multi-cell Li-ion batteries, cigarette lighter adapters, or DC inputs, in a range of 4.5V to 26V. It is available in 4, 6 and 8 channels, hence, suitable for white LED edge backlighting driving. The drivers also support dimming frequency of up to 100 kHz PWM, assuring silent functioning.
Several portable LCD systems need low-level backlight dimming to get more battery life, because they are powered by batteries and function in power saving modes or low lighting conditions. To address this issue, the AAT1409/7/5 driver features a design, which maintains high efficiency at the time of low PWM duty cycles. This minimizes wasted energy while light load conditions. The driver has a wide operating range of -40°C - +85°C.