Analog Devices LT3798

Description

The LT®3798 is a constant-voltage/constant-current isolatedflyback controller that combines active power factorcorrection (PFC) with no opto-coupler required for outputvoltage feedback into a single-stage converter. A LT3798based design can achieve a power factor of greater than 0.97by actively modulating the input current, allowing compliancewith most Harmonic Current Emission requirements.The LT3798 is well suited for a wide variety of off-lineapplications. 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 outputpower levels up to 100W. In addition, the LT3798 can easilybe designed into high DC input applications.

Features

• Isolated PFC Flyback with Minimum Number ofExternal 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

More information

• Datasheet