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DC/DC converters pack WLED driver, VCOM buffer

Posted: 10 Jun 2010 ?? ?Print Version ?Bookmark and Share

Keywords:DC/DC converter? WLED driver? buffer? LCD?

Advanced Analogic Technologies Inc. is offering its latest active matrix TFT LCD DC/DC converters that include a WLED driver and VCOM buffer.

Part of AnalogicTech's integrated Panel Power product line, the AAT282X devices target applications including automotive displays, digital photo frames, netbooks, e-readers and handheld GPS navigation devices.

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 well-suited for a wide variety of portable backlit display devices.

The AAT2822 flagship device includes a triple-output DC/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 products that remove features such as the VCOM buffer and backlight options, offering design flexibility.

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 fits within a footprint of 30mm x 21mm when incorporating the optional evaluation board.

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.

- Ismini Scouras

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