Datasheet Summary
.fairchildsemi.
LED Driver with Adaptive Charge Pump DC/DC Converter
Features
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- Parallel LED Driver Supports All Forward Voltages Adaptive VOUT Adjustment to the Highest Diode Voltage Internally Matched LED Current Sources No External ponents Needed to Set LED Current Built-in Charge Pump has Three Modes of Operation:
- Linear Regulation VIN > 4.2V
- 3/2 DC-DC Converter and Regulation 3.6V<VIN<4.2V
- 2/1 DC-DC Converter and Regulation 2.7V<VIN<3.6V Up to 86% Efficiency Low EMI, Low Ripple Up to 80mA Output Current (4 × 20mA) Built-in DAC for Digital or PWM Brightness Control Can be Duty Cycle Modulated between 0 to 18mA 2.7V to 5.5V Input Voltage Range ICC < 2µA in...