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AAT3152 - High Efficiency 1X/1.5X/2X Charge Pump

Description

The AAT3152 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 AAT3152 is capable of driving four-channel LEDs from a 2.7V to 5.5V input.

Features

  • VIN Range: 2.7V to 5.5V.
  • Fully Programmable Current with Single Wire.
  • Eight-Step Current: 20mA to 50µA.
  • Individual Main-Sub Group Control.
  • Low IQ (50µA) at Light Load.
  • Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage.
  • Drives 1-4 Channels of LEDs.
  • No Inductors, Low Noise Operation.
  • 1MHz Constant Switching Frequency.
  • Small.

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Datasheet Details

Part number AAT3152
Manufacturer Skyworks
File Size 686.61 KB
Description High Efficiency 1X/1.5X/2X Charge Pump
Datasheet download datasheet AAT3152 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DATA SHEET AAT3152 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3152 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 AAT3152 is capable of driving four-channel LEDs from a 2.7V to 5.5V input. The current sinks 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 VOUT) makes this part ideally suited for small, battery-powered applications.
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