LT3798 Series

Isolated No Opto-Coupler Flyback Controller with Active PFC

Catalog

Isolated No Opto-Coupler Flyback Controller with Active PFC

Part	Supplier Device Package	Package / Case	Package / Case	Output Isolation	Mounting Type	Internal Switch(s)	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Frequency - Switching [Min]	Frequency - Switching [Max]	Topology
Analog Devices LT3798MPMSE#TRPBF	16-MSOP-EP	16-TFSOP Exposed Pad	0.118 in 3 mm	Isolated	Surface Mount		-55 °C	150 °C	38 V	10 V	500 Hz	150 kHz	Flyback

Catalog

Isolated No Opto-Coupler Flyback Controller with Active PFC

Key Features

• Isolated PFC Flyback with Minimum Number of External Components

• VINand VOUTLimited 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

Description

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.ApplicationsOffline 5W to 100W+ ApplicationsHigh DC VINIsolated ApplicationsOffline Bus Converter (12V, 24V or 48V Outputs)