LED Driver is built around tri-mode charge pump.

Press Release Summary:

Providing LED backlight, camera flash, and RGB/status lighting in single chip, Model AAT2830/31 delivers up to 600 mA of current off single-cell Li-ion battery. Product drives 6 outputs programmable up to 30 mA each via external resistor, and LED intensity can be set to any of 16 levels using AS2Cwire(TM) interface. For camera flash, AAT2830/31 has 4 channels programmable up to 150 mA each, and 3 auxiliary outputs handle up to 60 mA for color RGB, keypad, or status lighting applications.

Original Press Release:

AnalogicTech Announces Unprecedented Integration of LED Display Drivers at Electronica

Total Display Solution Delivers LED Backlight, Camera Flash, and RGB/ Status Lighting in Single Chip

MUNICH, Germany, Nov. 14 -- Advanced Analogic Technologies Incorporated (AnalogicTech) (NASDAQ:AATI), a developer of power management semiconductors for mobile consumer electronic devices, announced at the Electronica Trade Show today the AAT2830/31, a highly integrated Total Display Solution for handsets and other portable systems operating off a single-cell Li-ion battery. Built around a high efficiency, tri-mode charge pump, the new device delivers up to 600 mA of current for the growing array of lighting applications in today's portable systems including main and sub display backlighting, camera flash, and RGB or auxiliary status lighting. Individual driving circuits for each function are controlled by AnalogicTech's patented, single wire AS2Cwire(TM) (Advanced Simple Serial Control) serial digital interface.

"As handset and portable system designers expand their use of lighting functions to include main and subpanel backlights, camera flash with movie- mode capability, RGB status and keypad backlighting, any discrete implementation of these subsystems conflicts directly with the need to minimize system footprint," said Adolfo Garcia, Product Line Director for AnalogicTech. "By combining a high performance charge pump and backlight, flash and RGB drivers into a single 4 x 4-mm IC controllable by a serial interface, the AAT2830/31 reduces parts count and system footprint while offering designers an exceptionally high level of configurability."

Individual Channel Control

The AAT2830/31 drives up to six outputs programmable up to 30 mA each via an external resistor for LED backlight applications. Individual control of each channel allows designers to drive four LEDs for a main display and two for a sub panel, or all six for a single display. LED intensity can be set to any of 16 levels using the AS2Cwire(TM) serial interface.

For camera flash functions, the AAT2830/31 supplies up to 600 mA of current through four individual channels programmable up to 150 mA each. In addition, the AAT2830/31 supports both flashlight and movie-mode operations. Three auxiliary outputs can be adjusted to handle up to 60 mA for color RGB, keypad, or status lighting applications. The AAT2830/31's high efficiency tri- mode charge pump provides enough power to operate all three types of LED functions -- backlight, flash and RGB -- simultaneously.

All settings for backlight, flash and RGB lighting are programmable via AnalogicTech's AS2Cwire interface. Color RGB drivers on the AAT2830 can be programmed into up to 4096 color/keypad intensity settings. For portable devices using smaller-scale displays, the AAT2831 offers RGB drivers programmable to 64-color/keypad intensity combinations.

To protect the LEDs from thermal damage, the AAT2830/31 also features an integrated Flash timer, which limits the maximum amount of time the LEDs can be illuminated. This unique feature also helps minimize battery drain during flash operations.

Price and availability

Specified over the -40 degree C to +85 degree C temperature range, the AAT2830/31 will be sampling in December 2006 and will be available in a Pb- free, thermally-enhanced, 24-pin QFN44 package. Budgetary pricing will be $1.96 in 1000-unit quantities .

About AnalogicTech

Advanced Analogic Technologies Incorporated (AnalogicTech) is a supplier of power management semiconductors for mobile consumer electronic devices, such as wireless handsets, notebook and tablet computers, smartphones, digital cameras, and digital audio players. The company focuses its design and marketing efforts on the application-specific power management needs of consumer, communications, and computing applications in these rapidly evolving devices. AnalogicTech is headquartered in Sunnyvale, California, with offices in Beijing, Hong Kong, Japan, Shanghai, Shenzhen, South Korea, Sweden, and Taiwan, as well as a worldwide network of sales representatives and distributors. For more information, please visit the AnalogicTech website: www.analogictech.com. (AnalogicTech - G)

Source: Advanced Analogic Technologies Incorporated (AnalogicTech)

Adolfo Garcia

Web site: www.analogictech.com/

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