LT3752 LT3752-1

RECOMMENDED FOR NEW DESIGNS

Active Clamp Synchronous Forward Controllers with Internal Housekeeping Controller

Data Sheet (Rev. D) Product Selection Table
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Overview

  • Input Voltage Range: LT3752: 6.5V to 100V, LT3752-1:Limited Only by External Components
  • Internal Housekeeping DC/DC Controller
  • Programmable Volt-Second Clamp
  • High Efficiency Control: Active Clamp, Synchronous Rectification, Programmable Delays
  • Short-Circuit (Hiccup Mode) Overcurrent Protection
  • Programmable Soft-Start/Stop
  • Programmable OVLO and UVLO with Hysteresis
  • Programmable Frequency (100kHz to 500kHz)
  • Synchronizable to an External Clock
  • AEC-Q100 Qualified for Automotive Applications
LT3752 LT3752-1
Active Clamp Synchronous Forward Controllers with Internal Housekeeping Controller
LT3752 Application Circuit LT3752 Pin Configuration
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Documentation

Data Sheet 1

User Guide 3

Technical Articles 3

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Overvoltage & Overcurrent Protectors 1
LTC4366
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper
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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LT3752
  • LT3752-1
  • LT3752-2
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.

Evaluation Kits

eval board
schematic 1
DC2175A

LT3752IFE/LT8311IFE Demo Board | Forward Converter with Synchronous Rectification, 9V ≤ VIN ≤ 36V; VOUT = 12V @ 13A

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Product Details

Demonstration circuit 2175A is an active clamp forward converter with synchronous rectification featuring the LT3752/LT8311 chipset.


This circuit was designed to demonstrate the high levels of performance, efficiency and high power. It operates at 200kHz and produces a regulated 12V, 13A output from a wide input voltage range of 9V to 36V, making it well suited for telecom, industrial, and other applications. Synchronous rectification helps to attain efficiency exceeding 93%.


 


eval board
schematic 2
schematic 3
schematic 4
schematic 5
DC1994A

LT3752EFE/LT8311EFE Isolated Demo Board | 18V ≤ VIN ≤ 72V; VOUT: 12V @ 12A

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Product Details

Demonstration circuit 1994A is an active clamp forward converter with synchronous rectification featuring the LT3752/LT8311 chipset. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using these parts. It operates at 240kHz and produces a regulated 12V, 12A output from an input voltage range of 18 to 72V: suitable for telecom, industrial, and other applications. It has an eighth-brick footprint area. Synchronous rectification helps to attain efficiency exceeding 94%.

eval board
schematic 6
DC1929A

LT3752EFE-1/LT8311EFE Demo Board | 150V ≤ VIN ≤ 400V, VOUT = 12V @ 16.7A

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Product Details

Demonstration circuit 1929A is a 200W active clamp forward converter featuring the LT3752-1/LT8311 chipset. The LT8311 is a secondary-side synchronous rectifier controller. The solution operates at about 100kHz and produces an isolated, regulated 12V / 16.7A output from an input voltage ranging from 150V to 400V, making it well suited for automotive, industrial, and other applications.


 
DC2175A
LT3752IFE/LT8311IFE Demo Board | Forward Converter with Synchronous Rectification, 9V ≤ VIN ≤ 36V; VOUT = 12V @ 13A
DC2175A - Schematic
DC1994A
LT3752EFE/LT8311EFE Isolated Demo Board | 18V ≤ VIN ≤ 72V; VOUT: 12V @ 12A
DC1994A Evaluation Board DC1994A Evaluation Board - Top View DC1994A Evaluation Board - Bottom View DC1994A - Schematic
DC1929A
LT3752EFE-1/LT8311EFE Demo Board | 150V ≤ VIN ≤ 400V, VOUT = 12V @ 16.7A
DC1929A - Schematic

Latest Discussions

22 Weeks Ago
LT3752 Datasheet Parameters
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Housekeeping output not overdriving INTVcc
35 Weeks Ago
LT8311 + LT3752: Secondary side LT8311 opto driver shuts off after short spike at boot. Primary side LT3752 feedback affected.
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