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Highly integrated LED display drivers deliver backlight, camera flash, and RGB/status lighting.

Date: 16 Nov 2006
Synopsis: ELECTRONICA, Munich, November 14th, 2006. By combining a high performance charge pump, with backlight, flash and RGB drivers into a single 4 x 4mm IC controllable by a serial interface, AnalogicTech’s AAT2830/31 reduces parts count and system footprint, offering handset and portable system designers an exceptionally high level of integration and configurability

Product news

Reference: AT0057(A)
Date: November 2006

Highly integrated LED display drivers deliver backlight, camera flash, and RGB/status lighting in single chip

ELECTRONICA, Munich, November 14th, 2006 – By combining a high performance charge pump, with backlight, flash and RGB drivers into a single 4 x 4mm IC controllable by a serial interface, AnalogicTech’s AAT2830/31 reduces parts count and system footprint, offering handset and portable system designers an exceptionally high level of integration and configurability.
The AAT2830/31, is 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 device delivers up to 600mA 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™ (Advanced Simple Serial Control) serial digital interface.  
As handset and portable system designers expand their use of lighting functions to include main and sub-panel backlights, camera flash with movie-mode capability, RGB status and keypad backlighting, any discrete implementation of these subsystems conflicts directly with the need to minimise system footprint.  AnalogicTech’s AAT2830/31 helps designers overcome many of these problems.
The AAT2830/31 drives up to six outputs programmable up to a maximum of 30mA each, settable 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™ serial interface.
For camera flash functions, the AAT2830/31 supplies up to 600mA of current through four individual channels programmable up to 150mA each.  In addition, the AAT2830/31 supports both flashlight and movie-mode operations.  Three auxiliary outputs can be adjusted to handle up to 60mA for colour 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. Colour RGB drivers on the AAT2830 can be programmed into up to 4096 colour/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.
Specified over the -40 C to +85 degrees 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.
For further information and reader enquiries:
 
Phil Dewsbury, Advanced Analogic Technologies, Inc., Europe, 1210 Parkview, Theale, Berkshire, RG7 4TY
Tel:       +44 (0) 1189 657763                             E-mail:  phildewsbury@analogictech.com
Fax:      +44 (0) 1189 657764                             Web:    http://www.analogictech.com/
 
For further editorial information, text and graphics by email or to discuss feature article opportunities:
 
Steve Rowley, Publitek Limited, 18 Brock Street, Bath, BA1 2LW, United Kingdom
Tel:       +44 (0) 1889 579493                              E-mail:  steve.rowley@publitek.com
Fax:      +44 (0) 1889 586987                              Web:    www.publitek.com
 
Note to editors:
Advanced Analogic Technologies Incorporated (AnalogicTech) is a supplier of Total Power Managementä semiconductor solutions for mobile consumer electronic devices, such as wireless handsets, notebook and tablet computers, smartphones, digital cameras, wireless LAN, and personal media 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 also develops and licenses device, process, package, and application-related technology. AnalogicTech is headquartered in Sunnyvale, California, with offices in South Korea, Taiwan, Hong Kong, Macau, Shanghai, Shenzhen, Beijing, Japan, Sweden, UK, and France, as well as a worldwide network of sales representatives and distributors. The company is listed on the NASDAQ exchange under the ticker symbol AATI. For more information, please visit the AnalogicTech website: www.analogictech.com. (AnalogicTech – G)
 
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Statements contained in this release that are not historical facts are forward-looking statements, as that term is defined in the Private Securities Litigation Reform Act of 1995. Forward-looking statements, including financial projections and forecasts, involve risks and uncertainties that could cause AnalogicTech’s actual results to differ materially from our current expectations. Factors that could cause AnalogicTech’s results to differ materially from those set forth in these forward-looking statements include customers’ cancellation or modification of their orders; our failure to accurately forecast demand for our products; the loss of, or a significant reduction in orders from, any of our significant customers; fluctuations in our operating results; our inability to develop and sell new products; defects in or failures of our products; the expense and uncertainty involved in our customer design-win efforts; the financial viability of the distributors of our products; consumer demand for cellular phones and other mobile consumer electronic devices; worldwide economic and political conditions, particularly in Asia; fluctuations in our costs to manufacture our products; our reliance on third parties to manufacture, test, assemble and ship our products; our ability to retain and attract key personnel; our ability to compete with our competitors; and our ability to protect our intellectual property rights and not infringe the intellectual property rights of others. Other factors that may cause our actual results to differ from those set forth in the forward-looking statements contained in this press release and that may affect our prospects in general are described in our filings with the Securities and Exchange Commission, including our Registration Statement on Form S-1 related to our initial public offering and our Annual Report on Form 10-K for the year ended December 31, 2005. AnalogicTech undertakes no obligation to update or revise forward-looking statements to reflect subsequent events or changed assumptions or circumstances.
 
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