AnalogicTech Optimizes Power Management for Small Form Factor Backlit Screens

Jun 01, 2010, 08:00 ET from Advanced Analogic Technologies, Inc.

SANTA CLARA, Calif., June 1 /PRNewswire-FirstCall/ -- Advanced Analogic Technologies, Inc. (AnalogicTech™) (Nasdaq: AATI), an analog semiconductor company focused on powering innovative solutions in consumer, industrial, and communications markets, today introduced the AAT282X active matrix thin film transistor (TFT) liquid crystal display (LCD) DC/DC converter family that includes a WLED driver and VCOM buffer to enable the delivery of a fully integrated power solution for portable backlit displays. Key target applications include automotive displays, digital photo frames, netbooks, e-readers and handheld GPS navigation devices.


"Portable displays have unique and challenging requirements for implementation into consumer products and must be able to deliver long battery life, better power efficiency and strong power regulation," said Ray Chan, technical marketing manager of Analogic Tech. "This part was designed with these requirements in mind and offers a variety of flexible and efficient solutions to accommodate backlighting active matrix TFT LCD screens ranging from 5 inches to 10 inches in size, delivering a clear competitive advantage to portable device manufacturers."

Part of AnalogicTech's integrated Panel Power solutions family, the AAT282X uses internal, low power, positive and negative charge pumps for higher efficiencies, lower ripples and tighter regulations to generate 30V symmetrical VGH and VGL voltages. With operation down to 2.5V, the AAT282X boost converter architecture is ideal for a wide variety of portable backlit display devices.

The AAT2822 flagship device includes a triple-output DC-to-DC converter for powering the column and row gate drivers, a 28V WLED backlight driver, and a VCOM buffer for distributing the mid-scale reference voltage across the display.  Depending on the display requirements, the AAT282X family offers additional affordable solutions that remove features such as the VCOM buffer and backlight options, offering design flexibility to accommodate any unique features required by a specific display design.

To minimize board space requirements, all products within the AAT282X family are offered in a compact, 4mm x 4mm Pb-free TQFN package. The complete solution itself fits within a footprint of 30mm x 21mm when incorporating the optional evaluation board.

AAT282X Key Features

  • LCD Bias Power
    • 2.5V to 5.5V Input Supply Range
    • 1.3MHz Fixed Frequency Current-Mode
    • Step-Up Regulator
    • Fast Transient Response
    • Adjustable Voltage up to 14.5V (+/-1% Typical Accuracy)
    • Small External Inductor and Capacitors
    • Integrated Soft Start and Sequencing of all Rails
    • Short-Circuit, Over-Voltage, and Over-Temperature Protection
  • Charge Pump Outputs: VGH & VGL
    • Up to 13.2V Input Supply (VDD)
    • Adjustable Voltage up to +/-30V@ 20mA (+/-3% Typical Accuracy)
  • WLED Driver
    • Input Voltage Range: 2.5V to 25V
    • Maximum Continuous Output: 12V @ 260mA & 28V @ 50mA
    • Panel sizes from 5" to 10"
    • Constant LED Current with 6% Accuracy
    • PWM Dimming Control Up to 1kHz with a High Frequency Filtered PWM
    • 1.3MHz Switching Fixed Frequency
    • Up to 90% Efficiency
  • VCOM Buffer
    • High-Performance
      • 13V/us Slew Rate
      • 12MHz, -3dB Bandwidth
    • +/-75mA Output Short-Circuit Current
    • Low 1.5mA Quiescent Current


The AAT282X family is made up of four separate products: the AAT2822; AAT2823; AAT2824; and AAT2825. The AAT2822 and AAT2823 are available immediately while the AAT2824 and AAT2825 are available on request.

To order samples, go to or contact your local AnalogicTech Distributor or Sales Office.

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About Advanced Analogic Technologies, Inc:

Advanced Analogic Technologies, Inc. (AnalogicTech) (NASDAQ: AATI) develops advanced semiconductor system solutions that play a key role in the continuing evolution of feature-rich, energy efficient electronic devices. The company focuses on addressing the application-specific power management needs of consumer devices such as mobile handsets, digital cameras, and netbooks/notebooks, as well as devices in a broad range of industrial, medical and telecom applications. AnalogicTech also licenses device, process, package, and application-related technologies. Headquartered in Silicon Valley, AnalogicTech has design centers in Santa Clara and Shanghai, and Asia-based operations and logistics. For more information, please visit (AnalogicTech - G).

The AnalogicTech logo is a registered trademark of Advanced Analogic Technologies, Inc. AnalogicTech is a trademark of Advanced Analogic Technologies, Inc. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.

SOURCE Advanced Analogic Technologies, Inc.