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AAT3140 - High Efficiency 1X/1.5X/2X Charge Pump

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.

Features

  • VIN Range: 2.7V to 5.5V.
  • Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage.
  • Drives Low-VF and High-VF Type LEDs.
  • Up to Four 30mA Outputs.
  • 32-Position Logarithmic Scale with Digital Control.
  • Low Noise Constant Frequency Operation.
  • 1MHz Switching Frequency.
  • AutoBias Technology.
  • Small.

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Datasheet preview – AAT3140

Datasheet Details

Part number AAT3140
Manufacturer Skyworks
File Size 1.67 MB
Description High Efficiency 1X/1.5X/2X Charge Pump
Datasheet download datasheet AAT3140 Datasheet
Additional preview pages of the AAT3140 datasheet.

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Full PDF Text Transcription

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DATA SHEET 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-powered applications.
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