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DC/DC boost converter designed for LCDs, OLEDs

Posted: 19 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:DC/DC converter? LCD? OLED?

From austriamicrosystems comes the AS1343 high voltage DC/DC boost converter, which is optimized for LCD and OLED display bias form low voltage inputs of single cell battery-powered applications. The AS1343 delivers 40mA at 24V from two AA cells or 30mA at 12V from a single AA cell and can provide adjustable output voltages in the range of 5.5V to 42V. The AS1343 operates from a single 0.9V to 3.6V supply. The 1MHz fixed switching frequency minimizes the PCB footprint by allowing the use of tiny, low profile inductors and capacitors. This constant frequency switching results in low, predictable output noise that can be easily filtered, says austriamicrosystems.

The AS1343 also offers an automatic power save operation, which improves the efficiency at light loads. Furthermore, the micropower design reduces the operating supply current to only 22?A. This significant reduction of the power consumption of the AS1343 substantially increases battery life in the application. Moreover the AS1343 offers a shutdown mode requiring less than 1?A current combined with an output disconnect feature.

The AS1343 offers 2 percent output voltage accuracy and an available power-ok feature indicates if voltage is within 10 percent of regulation. The part is for powering a variety of different OLED or LCD displays in handheld devices or any other application requiring high output voltages.

The AS1343 is available in the compact 3mm x 3mm x 0.8mm TDFN 10-pin package and covers the industrial temperature range of -40C to +85C.

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