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AAT3140

Part Number	AAT3140
Manufacturer	AAT
Description	High Efficiency 1X/1.5X/2X Charge Pump
Published	Apr 30, 2007
Detailed Description	AAT3140 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3140 is a low noise...
Datasheet	AAT3140 PDF File

Overview

AAT3140 High Efficiency 1X/1.
5X/2X Charge Pump for White LED Applications General Description The AAT3140 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.
5X), and doubling (2X) conversion to maximize efficiency for white LED applications.
The device produces current levels up to 30mA on each of its four current source outputs to drive various arrangements of LEDs from a 2.
7V to 5.
5V input.
Outputs may be operated individually or in parallel for driving higher-current LEDs.
A low external parts count (two 1µF flying capacitors and two small 1µF capacitors at VIN and CP) make the AAT3140 ideally suited for small battery-powere...

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