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AAT3155 - High Efficiency 1X/1.5X/2X Charge Pump

Description

The AAT3155 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.

Features

  • ChargePump™ VIN Range: 2.7V to 5.5V Fully Programmable Current with Single Wire.
  • 16 Current Levels.
  • 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 up to Four Channels of LEDs No Inductors, Low Noise Operation 1MHz Constant Switching Frequency Small.

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Datasheet Details

Part number AAT3155
Manufacturer AAT
File Size 311.09 KB
Description High Efficiency 1X/1.5X/2X Charge Pump
Datasheet download datasheet AAT3155 Datasheet

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Full PDF Text Transcription

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www.DataSheet4U.com High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications General Description The AAT3155 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 AAT3155 is capable of driving up to four channels of LEDs at 20mA per channel 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 IN and OUTCP) make this part ideally suited for small, battery-powered applications.
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