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AAT3151 - High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications

Description

The AAT3151 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

  • 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 (40µA) for Low Current Mode Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage Drives Four Channels of LEDs Individual Main/Su.

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Datasheet Details

Part number AAT3151
Manufacturer Advanced Analogic Technologies
File Size 220.67 KB
Description High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications
Datasheet download datasheet AAT3151 Datasheet

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Full PDF Text Transcription (Reference)

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www.DataSheet4U.com AAT3151 High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications General Description The AAT3151 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 AAT3151 is capable of driving four-channel LEDs at a total of 120mA 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 the AAT3151 ideally suited for small battery-powered applications.
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