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| austriamicrosystems introduces AS1344 DC-DC converter | ||
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 July 23, 2009 – austriamicrosystems launched the AS1344 high voltage DC-DC boost converter optimized for biasing of Photodiodes, LCD or PMOLED display powered from single cell batteries. At 15V output voltage the AS1344 delivers 120mA from a 3V or 28mA from a 1.5V input voltage. The AS1344 operates from a single 0.9 to 3.6V supply and provides adjustable output voltages in the range of 5.5 to 42V. 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. Battery powered applications with PMOLED, or e-ink displays, need a high efficiency step-up converter which is able to deliver an output voltage of approximately 15V at a relatively moderate current. The AS1344 addresses this need offering very high efficiency even at high output voltages. Additionally, single or dual cell applications are also supported. The AS1344 also offers an automatic power save operation which improves the efficiency at light loads. Furthermore, the micro-power design reduces the operating supply current to only 22µA. This significant reduction of power consumption substantially increases battery life in the application. AS1344 offers both a 1uA shutdown mode, combined with an output disconnect feature. This capability reduces PCB space and BOM in applications such as PMOLED or e-ink displays, where disconnection is required for optimal operation and reduced power consumption. With an adjustable soft-start feature the AS1344 enables power up of applications even with drained batteries by limiting the input current during start-up. The AS1344 offers 2% output voltage accuracy and a power-ok feature indicates when voltage is within 10% of regulation. The part is ideally suited for powering a variety of different PMOLED, e-ink or LCD displays in handheld devices, or other applications such as microphones, photodiodes or LED strings requiring high voltages. The AS1344 is available in the compact 3 x 3x 0.8mm TDFN 10-pin package and covers the industrial temperature range of -40°C to +85°C. For product specific information, download data sheets or request free samples from austriamicrosystems' online shop ICdirect, please visit http://www.austriamicrosystems.com/DC-DC-Step-up-Converter/AS1344. |
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