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AAT3194 - High Efficiency 1.5X Fractional Charge Pump

Datasheet Summary

Description

The AAT3194 is a low noise, constant frequency charge pump DC/DC converters that use fractional (1.5X) conversion to increase efficiency in white LED applications.

The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input.

Features

  • VIN Range: 2.7V to 5.5V.
  • 20mA Full-Scale Current.
  • Simple Serial Control (S2Cwire) Interface.
  • 32-Position Logarithmic Scale with Digital Control.
  • Low Noise Constant Frequency Operation.
  • 33% Less Input Current Than Doubler Charge Pump.
  • High Accuracy Brightness Matching.
  • Small.

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Datasheet preview – AAT3194

Datasheet Details

Part number AAT3194
Manufacturer Skyworks
File Size 1.22 MB
Description High Efficiency 1.5X Fractional Charge Pump
Datasheet download datasheet AAT3194 Datasheet
Additional preview pages of the AAT3194 datasheet.

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Full PDF Text Transcription

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DATA SHEET AAT3194 High Efficiency 1.5X Fractional Charge Pump For White LED Applications General Description The AAT3194 is a low noise, constant frequency charge pump DC/DC converters that use fractional (1.5X) conversion to increase efficiency in white LED applications. The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input. A low external parts count (two 1µF flying capacitors and two small bypass capacitors at IN and OUT) makes these devices ideally suited for small, battery-powered applications. Skyworks' Simple Serial Control™ (S2Cwire™) interface is used to enable, disable, and set the LED drive current for 32-level logarithmic scale LED brightness control.
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