AAT3194 - High Efficiency 1.5X Fractional Charge Pump
Skyworks Solutions
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.
Key Features
VIN Range: 2.7V to 5.5V.
20mA Full-Scale Current.
Simple Serial Control (S2Cwire) Interface.
32-Position Logarithmic Scale with Digital Control.
Full PDF Text Transcription for AAT3194 (Reference)
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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 D...
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scription 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.
AAT3194 Datasheet
