The LT3798 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. The LT3798 is well suited for a wide variety of off-line applications. The input range can be scaled up or down, depending mainly on the choice of external components. Efficiencies higher than 86% can be achieved with output power levels up to 100W. In addition, the LT3798 can easily be designed into high DC input applications. Applications * Offline 5W to 100W+ Applications * High DC VIN Isolated Applications * Offline Bus Converter (12V, 24V or 48V Outputs) * 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 https://elecena.pl/product/2512269/isolated-no-opto-coupler-flyback-controller-with-active-pfc 2012-02-22 https://elecena.pl/product/2512269/isolated-no-opto-coupler-flyback-controller-with-active-pfc 2017-10-09 https://elecena.pl/product/2512269/isolated-no-opto-coupler-flyback-controller-with-active-pfc 2025-01-21