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AAT3120 - 3-Channel Charge Pump

Description

The AAT3120 is a low noise, constant frequency charge pump DC/DC converter that uses fractional (1.5X) conversion to improve efficiency for white LED applications.

The device can be used to produce eight current levels up to 20mA per channel for up to three channels.

Features

  • ChargePump™.
  • VIN Range: 2.7V to 5.5V Fractional Charge Pump Mode Drives Low-VF and High-VF Type LEDs Up to Three LED Outputs.
  • Single Wire Programming.
  • Eight Regulated Current Settings.
  • Max 20mA per Channel Low Noise Constant Frequency Operation No Inductors 1MHz Switching Frequency Small.

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Datasheet Details

Part number AAT3120
Manufacturer AAT
File Size 283.77 KB
Description 3-Channel Charge Pump
Datasheet download datasheet AAT3120 Datasheet

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Full PDF Text Transcription

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AAT3120 3-Channel Charge Pump For White LED Applications General Description The AAT3120 is a low noise, constant frequency charge pump DC/DC converter that uses fractional (1.5X) conversion to improve efficiency for white LED applications. The device can be used to produce eight current levels up to 20mA per channel for up to three channels. 1X load switch mode is also built-in to improve efficiency at low current settings. Low external parts count (two 1µF flying capacitors and two small 1µF capacitors at VIN and OUT) makes the AAT3120 ideally suited for small battery-powered applications. AnalogicTech's S2Cwire™ (Simple Serial Control™) serial digital input is used to enable, disable, and set current for each LED at eight different levels.
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