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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.

Key Features

  • ChargePump™.
  • 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 (80µA) 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.

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Datasheet Details

Part number AAT3152
Manufacturer Advanced Analogic Technologies
File Size 171.83 KB
Description High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications
Datasheet download datasheet AAT3152 Datasheet

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www.DataSheet4U.com 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. 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.