AAT3194 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,...
AAT3194 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
- Low Noise Constant Frequency Operation
- 33% Less Input Current Than Doubler Charge Pump
- High Accuracy Brightness Matching
- Small Application Circuit
- Regulated Output Current
- Automatic Soft Start
AAT3194 Applications
- VIN Range: 2.7V to 5.5V