LTC3766
High Efficiency, Secondary-Side Synchronous Forward Controller
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Overview
Features and Benefits
- 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
Product Details
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
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (5)
Documentation & Resources
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R419 Reliability Data3/22/2018PDF27 K
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DC2199B-C - Demo Manual11/29/2016PDF799K
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DC2199A-B - Demo Manual6/2/2015PDF638K
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DC2199A-A - Demo Manual11/3/2014PDF520K
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DC1739B-C - Demo Manual8/15/2013PDF3M
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DC1739A-B - Demo Manual6/27/2012PDF322K
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LTC3765/LTC3766 Isolated Forward Converter7/2/2012PDF170K
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Design a Simple, Efficient and Reliable Forward Converter10/15/2018 -
LTC3765/LTC3766 Video Product Brief10/15/2018
Tools & Simulations
LTspice
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.
LTspice Simulations
Models for the following parts are available in LTspice:
LTC3766
Design Resources
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.
PCN-PDN Information
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Support & Discussions
LTC3766 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.