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AAT3194 - High Efficiency 1.5X Fractional Charge Pump

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

  • ChargePump™ 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 Details

Part number AAT3194
Manufacturer AAT
File Size 334.54 KB
Description High Efficiency 1.5X Fractional Charge Pump
Datasheet download datasheet AAT3194 Datasheet

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Full PDF Text Transcription

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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. AnalogicTech’s 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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