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Optoelectronics/Displays??

AnalogicTech rolls out charge pumps for color LED apps

Posted: 16 Nov 2004 ?? ?Print Version ?Bookmark and Share

Keywords:advanced analogic technologies? analogictech? charge pump? led? aat3151?

Advanced Analogic Technologies Inc. (AnalogicTech), a developer of power management solutions, introduced five new tri-mode, high-efficiency charge pumps for white LED backlight and color LED applications.

According to AnalogicTech, the new AAT3151/2/3/6 family and AAT3129 devices complements its existing line of white LED drivers, enabling them to offer a complete lighting solution for handsets, including drivers for white LED backlight, RGB LEDs and camera flash solutions.

Designed to meet the wiring requirements of second generation display modules, the AAT3151/2/3/6 tri-mode devices combine a load switch (1X) and a high-efficiency (1.5X or 2X) charge pump with an internal sensing circuit that monitors the required voltage on each constant current sink input. The load switch and charge pump modes are set based on the input battery voltage and current sink input voltage.

Additionally, the AAT3151/2/3/6 devices can drive four or six individual LEDs with a maximum current of 30mA per channel. To control current level for the LED channels, different devices in this product family feature the company's S?Cwire (Simple Serial Control) or AS?Cwire (Advanced Simple Serial Control) interface.

AnalogicTech gave an example: the AAT3153 utilizes S&supp2;Cwire single wire brightness control, while the AAT3156 adds the company's AS?Cwire interface which provides individual control of one bank of four LEDs and a second bank of two.




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