16-string LED drivers with integrated timing algorithms

Published:2012/3/11 21:57:00 Author:Ecco From:SeekIC

Atmel Corporation has pushed a new family of high-performance 16-string LED drivers with integrated timing algorithms that improve LCD TVs’ picture quality by eliminating 3D ghosting and flickering effects. With these capabilities, the Atmel MSL2164 and Atmel MSL2166 devices are designed for the new 2D and 3D scrolling backlight TVs.

The MSL2164 and MSL2166 devices drive up to 16 parallel strings of LEDs and offer comprehensive system and fault management to support high-performance backlight design. The MSL2164 and MSL2166 feature high efficiency power management and backlight control along with multiple dimming modes for 3D, scanning and zone dimming edge-lit LCD TVs. The LED drivers are designed to work seamlessly with Atmel AVR microcontrollers (MCUs), including the Atmel tinyAVR, Atmel megaAVR and Atmel AVR XMEGAdevices. The AVR devices, along with firmware, provide a total solution that optimizes the entire backlight design.

With this new driver family, high-end TV OEMs can transmit resolution and greatly enhance picture quality by using internal lighting timing algorithms. It improves the backlight timing accuracy with higher resolution. At the same time, since OEMs will be able to select smaller form factor MCUs, such as tinyAVR devices, they can lower their system overhead.

LED drivers would generate algorithms to make an appropriate string phase to optimize synchronization of the backlight to the LCD panel. Generally, OEMs have to perform additional calculations to adjust the string phrase to ensure that the backlight was properly synchronized within the frame refresh. The MSL2164 and MSL2166 devices drive external MOSFETs with high current accuracy and string matching.


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