LT3798
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LT3798

Isolated No Opto-Coupler Flyback Controller with Active PFC

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LTspice LT3798/LT8309 Demo Circuit - Energy Star Compliant Isolated Converter (85-150VAC to 5V @ 2.2A) Download 9.00KB LTspice LT3798 - Power Control Download 6.83 KB LTspice LT3798 Demo Circuit - Isolated No Opto-Coupler Flyback Controller with Active PFC (90-265VAC to 24V @ 2A) Download 8.00KB
Part Models 8
1ku List Price Starting From $2.72
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
Additional Details
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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)
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file View Data Sheet
Documentation View All Documentation
LTspice LT3798/LT8309 Demo Circuit - Energy Star Compliant Isolated Converter (85-150VAC to 5V @ 2.2A) Download 9.00KB LTspice LT3798 - Power Control Download 6.83 KB LTspice LT3798 Demo Circuit - Isolated No Opto-Coupler Flyback Controller with Active PFC (90-265VAC to 24V @ 2A) Download 8.00KB
Part Models 8
1ku List Price Starting From $2.72
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LT3798

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Data Sheet

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UPDATED 12/12/2012
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LT3798: Isolated No Opto-Coupler Flyback Controller with Active PFC Data Sheet

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UPDATED 02/18/2013
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LT3798: アクティブPFC機能を備えたオプトカプラ不要の絶縁型フライバック・コントローラ データシート

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User Guide

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UPDATED 11/12/2014
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DC1817B - Demo Manual redirect icon

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Reliability Data

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UPDATED 03/26/2018
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UPDATED 02/10/2015
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LT3798/LT8309 5V, 2A Energy Star Compliant Isolated Converter redirect icon

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UPDATED 02/10/2015
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LT3798 符合能源之星标准的 5V、2A 隔离型转换器 redirect icon

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UPDATED 02/10/2015
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LT3798 エネルギースター準拠の5V、2A絶縁型コンバータ redirect icon

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UPDATED 06/10/2016
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UPDATED 06/10/2016
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Documentation

Product Selector Card 1

No-Opto Isolated Flyback Converters

Solutions Bulletin & Brochure 1

You Can Do Offline Power

Video

3

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Video

2017-09-18

Isolated Flyback Controller with PFC Controls Voltage or Current

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Video

2017-09-18

07:21

LTspice: Evaluating Electrical Quantities

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Video

2017-09-18

LT3798 Video Product Brief

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3798EMSE#PBF 16-Lead MSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT3798EMSE#TRPBF 16-Lead MSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT3798HMSE#PBF 16-Lead MSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT3798HMSE#TRPBF 16-Lead MSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT3798IMSE#PBF 16-Lead MSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT3798IMSE#TRPBF 16-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3798MPMSE#PBF 16-Lead MSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3798MPMSE#TRPBF 16-Lead MSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link

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Product Lifecycle

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Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LT3798EMSE#PBF

PRODUCTION

LT3798EMSE#TRPBF

PRODUCTION

LT3798HMSE#PBF

PRODUCTION

LT3798HMSE#TRPBF

PRODUCTION

LT3798MPMSE#PBF

PRODUCTION

LT3798MPMSE#TRPBF

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PCN24_0003_Form

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Material_Report

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Qualification Results Summary

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Delta Qualification Matrix

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Feb 4, 2020

- 20_0132

Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LT3798EMSE#PBF

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LT3798EMSE#TRPBF

PRODUCTION

LT3798HMSE#PBF

PRODUCTION

LT3798HMSE#TRPBF

PRODUCTION

LT3798IMSE#PBF

PRODUCTION

LT3798IMSE#TRPBF

PRODUCTION

LT3798MPMSE#PBF

PRODUCTION

LT3798MPMSE#TRPBF

PRODUCTION

pdf

PCN20_0132_Form

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xls

Material_Report

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Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT3798IMSE#PBF

PRODUCTION

LT3798IMSE#TRPBF

PRODUCTION

pdf

PCN22_0244_Form

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xls

Material_Report

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pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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Jul 12, 2022

- 22_0157

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

LT3798IMSE#PBF

PRODUCTION

LT3798IMSE#TRPBF

PRODUCTION

pdf

PCN22_0157_Form

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xls

Material_Report

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pdf

Qualification Results Summary

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Delta Qualification Matrix

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Detailed Parts List

Jun 21, 2022

- 22_0050

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

LT3798IMSE#PBF

PRODUCTION

LT3798IMSE#TRPBF

PRODUCTION

pdf

PCN22_0050_Form

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xls

Material_Report

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pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LT3798EMSE#PBF

PRODUCTION

LT3798EMSE#TRPBF

PRODUCTION

LT3798HMSE#PBF

PRODUCTION

LT3798HMSE#TRPBF

PRODUCTION

LT3798MPMSE#PBF

PRODUCTION

LT3798MPMSE#TRPBF

PRODUCTION

pdf

PCN24_0003_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Feb 4, 2020

- 20_0132

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Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LT3798EMSE#PBF

PRODUCTION

LT3798EMSE#TRPBF

PRODUCTION

LT3798HMSE#PBF

PRODUCTION

LT3798HMSE#TRPBF

PRODUCTION

LT3798IMSE#PBF

PRODUCTION

LT3798IMSE#TRPBF

PRODUCTION

LT3798MPMSE#PBF

PRODUCTION

LT3798MPMSE#TRPBF

PRODUCTION

pdf

PCN20_0132_Form

external-icon

xls

Material_Report

Download
Oct 11, 2022

- 22_0244

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT3798IMSE#PBF

PRODUCTION

LT3798IMSE#TRPBF

PRODUCTION

pdf

PCN22_0244_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Jul 12, 2022

- 22_0157

arrow down

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

LT3798IMSE#PBF

PRODUCTION

LT3798IMSE#TRPBF

PRODUCTION

pdf

PCN22_0157_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Detailed Parts List
Jun 21, 2022

- 22_0050

arrow down

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

LT3798IMSE#PBF

PRODUCTION

LT3798IMSE#TRPBF

PRODUCTION

pdf

PCN22_0050_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download

Software & Part Ecosystem

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Evaluation Kits 1

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DC1817B

LT3798EMSE Isolated Demo Board VIN = 90VAC to 265VAC, VOUT = 24V @ 2A High Voltage

Evaluation Kits1

evaluation kit item images

DC1817B

LT3798EMSE Isolated Demo Board VIN = 90VAC to 265VAC, VOUT = 24V @ 2A High Voltage

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

spice tool Lt Spice

LT3798/LT8309 Demo Circuit - Energy Star Compliant Isolated Converter (85-150VAC to 5V @ 2.2A) Download

9.00K

spice tool Lt Spice

LT3798 - Power Control Download

6.83 K

spice tool Lt Spice

LT3798 Demo Circuit - Isolated No Opto-Coupler Flyback Controller with Active PFC (90-265VAC to 24V @ 2A) Download

8.00K

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