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AAT3156 - High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications

Description

The AAT3156 is a low noise, constant frequency charge pump DC/DC converter that uses a trimode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications.

The AAT3156 is capable of driving six-channel LEDs at a total of 180mA from a 2.7V to 5.

Features

  • ChargePump™.
  • VIN Range: 2.7V to 5.5V Fully Programmable Current with Single Wire.
  • 16-Step Logarithmic Scale.
  • 15/20/30mA Max Current.
  • Four Low Current Settings Down to 50µA.
  • Low IQ (50µA) for Low Current Mode Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage Drives Six Channels of LEDs Individual Main/Sub.

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Datasheet Details

Part number AAT3156
Manufacturer Advanced Analogic Technologies
File Size 388.91 KB
Description High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications
Datasheet download datasheet AAT3156 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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www.DataSheet4U.com AAT3156 High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications General Description The AAT3156 is a low noise, constant frequency charge pump DC/DC converter that uses a trimode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The AAT3156 is capable of driving six-channel LEDs at a total of 180mA 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) make this part ideally suited for small battery-powered applications.
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