LTC3766
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LTC3766

High Efficiency, Secondary-Side Synchronous Forward Controller

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LTspice LTC3766 - Switching Regulators Download 7.58 KB LTspice LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (36-60V to 12V @ 30A) Download 13.00KB LTspice LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (36-60V to 24V @ 15A) Download 14.00KB LTspice LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (18-72V to 12V @ 12.5A) Download 12.00KB LTspice LTC3765/LTC3766 Demo Circuit - 120W Isolated Forward Converter with Synchronous Rectification (9-36V to 12V @ 10A) Download 12.00KB LTspice LTC3765 - Switching Regulators, LTC3766 - Switching Regulators Download 8.65 KB
Part Models 16
1ku List Price Starting From $4.63
Features
  • Direct Flux Limit™ Guarantees No Saturation
  • Fast and Accurate Average Current Limit
  • Clean Start-Up Into Pre-Biased Output
  • Secondary-Side Control for Fast Transient Response
  • Simple, Self-Starting Architecture
  • Synchronous MOSFET Reverse Current Limit
  • PolyPhase® Operation Eases High-Power Design
  • True Remote Sense Differential Amplifier
  • Remote Sense Reverse Protection
  • High Voltage Linear Regulator Controller
  • Internal LDO Powers Gate Drive from VOUT
  • Overtemperature/Overvoltage Protection
  • Low Profile 4mm × 5mm QFN and Narrow 28-Lead SSOP Packages
Additional Details
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The LTC3766 is a PolyPhase-capable secondary-side controller for synchronous forward converters. When used in conjunction with the LTC3765 active-clamp forward controller and gate driver, the part creates a complete isolated power supply that combines the power of multiphase operation with the speed of secondary-side control.

The LTC3766 has been designed to simplify the design of active clamp forward converters. Working in concert with the LTC3765, the LTC3766 forms a robust, self-starting converter that eliminates the need for the separate bias regulator that is commonly used in secondary-side control applications. A precision current-limit coupled with clean start-up into a pre-biased load make the LTC3766 an excellent choice for high-power battery charger applications.

The LTC3766 provides extensive remote sensing and output protection features, while Direct Flux Limit guarantees no transformer saturation without compromising transient response. A linear regulator controller and internal bypass LDO are also provided to simplify the generation of the secondary-side bias voltage.

Applications

  • Isolated 48V Telecommunication Systems
  • Isolated Battery Chargers
  • Automotive and Military Systems
  • Industrial, Avionics and Heavy Equipment
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file View Data Sheet
Documentation View All Documentation
LTspice LTC3766 - Switching Regulators Download 7.58 KB LTspice LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (36-60V to 12V @ 30A) Download 13.00KB LTspice LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (36-60V to 24V @ 15A) Download 14.00KB LTspice LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (18-72V to 12V @ 12.5A) Download 12.00KB LTspice LTC3765/LTC3766 Demo Circuit - 120W Isolated Forward Converter with Synchronous Rectification (9-36V to 12V @ 10A) Download 12.00KB LTspice LTC3765 - Switching Regulators, LTC3766 - Switching Regulators Download 8.65 KB
Part Models 16
1ku List Price Starting From $4.63
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LTC3766

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Data Sheet

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UPDATED 09/29/2016
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LTC3766: High Efficiency, Secondary-Side Synchronous Forward Controller Data Sheet

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UPDATED 09/06/2013
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LTC3766: 高効率の2次側同期整流式フォワード・コントローラ データシート

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User Guide

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UPDATED 11/29/2016
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DC2199B-C - Demo Manual redirect icon

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DC2199A-B - Demo Manual redirect icon

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Reliability Data

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Documentation

Product Selector Card 1

LTC3765/LTC3766 Isolated Forward Converter

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2017-09-18

LTC3765/LTC3766 Video Product Brief

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2017-09-18

Design a Simple, Efficient and Reliable Forward Converter

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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
LTC3766EGN#PBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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LTC3766EGN#TRPBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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LTC3766EUFD#PBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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LTC3766EUFD#TRPBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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LTC3766HGN#PBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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LTC3766HGN#TRPBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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LTC3766HUFD#PBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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LTC3766HUFD#TRPBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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LTC3766IGN#PBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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LTC3766IGN#TRPBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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LTC3766IUFD#PBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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LTC3766IUFD#TRPBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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LTC3766MPGN#PBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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LTC3766MPGN#TRPBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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LTC3766MPUFD#PBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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LTC3766MPUFD#TRPBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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Aug 10, 2022

- 22_0177

Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

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Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC3766EGN#PBF

PRODUCTION

LTC3766EGN#TRPBF

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LTC3766HGN#PBF

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LTC3766HGN#TRPBF

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Evaluation Kits 5

reference details image

DC2199B-C

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 56V @ 5.4A

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DC2199B-C

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 56V @ 5.4A

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DC2199B-C
LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 56V @ 5.4A
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Product Detail

Demonstration circuit 2199B-C is a 300W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766 chip-set. It produces a regulated 56V, 5.4A output from an input voltage range of 36V to 60V.



Resources

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DC2199B-C - Demo Manual Download

799.00K

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DC2199B-C - Design Files Download

2.00M

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DC2199B-C - Schematic Download

74.00K

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DC2199A-B

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 24V @ 15A

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DC2199A-B

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 24V @ 15A

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Download

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DC2199A-B
LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 24V @ 15A
Buy Now View Details

Product Detail

Demonstration circuit 2199A-B is a 360W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766 chip-set. It produces a regulated 24V, 15A output from an input voltage range of 36V to 60V.



Resources

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PDF

DC2199A-B - Demo Manual Download

638.00K

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DC2199A-B - Design Files Download

1.00M

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PDF

DC2199A-B - Schematic Download

76.00K

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DC1739B-C

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 9V ≤ VIN ≤ 36V; VOUT = 12V @ 10A

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DC1739B-C

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 9V ≤ VIN ≤ 36V; VOUT = 12V @ 10A

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Download

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DC1739B-C
LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 9V ≤ VIN ≤ 36V; VOUT = 12V @ 10A
Buy Now View Details

Product Detail

Demonstration circuit 1739B-C is a 120W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766 chip set. This circuit demonstrates the high level of performance, efficiency, and small solution size attainable using this chipset in an active-clamp-reset forward converter power supply. It operates at 240kHz and produces a regulated 12V/10A output from an input voltage range of 9V to 36V. It has an eighth-brick footprint area.

Resources

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PDF

DC1739B-C - Demo Manual Download

3.00M

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ZIP

DC1739B-C - Design Files Download

1.00M

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PDF

DC1739B-C - Schematic Download

85.00K

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DC1739A-B

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 18V ≤ VIN ≤ 72V; VOUT = 12V @ 12.5A

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DC1739A-B

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 18V ≤ VIN ≤ 72V; VOUT = 12V @ 12.5A

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DC1739A-B
LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 18V ≤ VIN ≤ 72V; VOUT = 12V @ 12.5A
Buy Now View Details

Product Detail

Demonstration circuit 1739A-B is a 150W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766. This circuit demonstrates a high level of performance, efficiency, and small solution size attainable using these parts in an active-clamp-reset forward converter power supply. It operates at 240kHz and produces a regulated 12V, 12.5A output from an input voltage range of 18V to 72V, making it well suited for telecom, industrial, and other applications.

Resources

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PDF

DC1739A-B - Schematic Download

38.00K

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PDF

DC1739A-B - Demo Manual Download

322.00K

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ZIP

DC1739A-B - Design Files Download

1.00M

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DC2199A-A

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 36V ≤ VIN ≤ 60V; VOUT = 12V @ 30A

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DC2199A-A

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 36V ≤ VIN ≤ 60V; VOUT = 12V @ 30A

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Download

 print icon

Print
DC2199A-A
LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 36V ≤ VIN ≤ 60V; VOUT = 12V @ 30A
Buy Now View Details

Product Detail

Demonstration circuit 2199A-A is a 360W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766. It produces a regulated 12V, 30A output from an input voltage range of 36V to 60V.



Resources

pdf icon

ZIP

DC2199A-A - Design Files Download

1.00M

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PDF

DC2199A - Schematic Download

77.00K

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PDF

DC2199A-A - Demo Manual Download

520.00K

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Evaluation Kits5

evaluation kit item images

DC2199B-C

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 56V @ 5.4A
evaluation kit item images

DC2199A-B

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 24V @ 15A
evaluation kit item images

DC1739B-C

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 9V ≤ VIN ≤ 36V; VOUT = 12V @ 10A
evaluation kit item images

DC1739A-B

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 18V ≤ VIN ≤ 72V; VOUT = 12V @ 12.5A
evaluation kit item images

DC2199A-A

LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 36V ≤ VIN ≤ 60V; VOUT = 12V @ 30A

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.

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LTC3766 - Switching Regulators Download

7.58 K

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LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (36-60V to 12V @ 30A) Download

13.00K

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LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (36-60V to 24V @ 15A) Download

14.00K

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LTC3765/LTC3766 Demo Circuit - Active Clamp Forward Converter (18-72V to 12V @ 12.5A) Download

12.00K

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LTC3765/LTC3766 Demo Circuit - 120W Isolated Forward Converter with Synchronous Rectification (9-36V to 12V @ 10A) Download

12.00K

spice tool Lt Spice

LTC3765 - Switching Regulators, LTC3766 - Switching Regulators Download

8.65 K

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