DESCRIPTION
The LT®3798 is a constant-voltage/constant-current isolated flyback controller that combines active power factor correction (PFC) with no opto-coupler required for output voltage feedback into a single-stage converter. A LT3798 based design can achieve a power factor of greater than 0.97 by actively modulating the input current, allowing compliance with most Harmonic Current Emission requirements.

FEATURES
■ Isolated PFC Flyback with Minimum Number of External Components
■ VIN and VOUT Limited Only by External Components
■ Active Power Factor Correction
■ Low Harmonic Distortion
■ No Opto-Coupler Required
■ Constant-Current and Constant-Voltage Regulation
■ Accurate Regulated Voltage and Current (±5% Typical)
■ Energy Star Compliant (<0.5W No Load Operation)
■ Thermally Enhanced 16-lead MSOP Package

APPLICATIONS
■ Offline 5W to 100W+ Applications
■ High DC VIN Isolated Applications
■ Offline Bus Converter (12V, 24V or 48V Outputs)