LTC3722

PRODUCTION

Synchronous Dual Mode Phase Modulated Full Bridge Controllers

Data Sheet (Rev. C) Product Selection Table

Part Models: 10
1ku List Price: Starting From $7.25

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Overview

Adaptive or Manual Delay Control for Zero Voltage Switching Operation
Adjustable Synchronous Rectification Timing for Highest Efficiency
Adjustable Maximum ZVS Delay
Adjustable System Undervoltage Lockout Hysteresis
Programmable Leading Edge Blanking
Very Low Start-Up and Quiescent Currents
Current Mode (LTC3722-1) or Voltage Mode (LTC3722-2) Operation
Programmable Slope Compensation
V_CC UVLO and 25mA Shunt Regulator
50mA Output Drivers
Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection
5V, 15mA Low Dropout Regulator
24-Pin Surface Mount GN Package

The LTC3722-1/LTC3722-2 phase-shift PWM controllers provide all of the control and protection functions necessary to implement a high efficiency, zero voltage switched (ZVS), full bridge power converter. Adaptive ZVS circuitry delays the turn-on signals for each MOSFET independent of internal and external component tolerances. Manual delay set mode enables secondary side control operation or direct control of switch turn-on delays.

The LTC3722-1/LTC3722-2 feature adjustable synchronous rectifier timing for optimal efficiency. A UVLO program input provides accurate system turn-on and turn-off voltages. The LTC3722-1 features peak current mode control with programmable slope compensation and leading edge blanking, while the LTC3722-2 employs voltage mode control.

The LTC3722-1/LTC3722-2 feature extremely low operating and start-up currents. Both devices include a full range of protection features and are available in the 24-pin surface mount GN package.

Applications

Telecommunications, Infrastructure Power Systems
Distributed Power Architectures
Server Power Supplies

Part Models: 10
1ku List Price: Starting From $7.25

Documentation

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
LTC3722EGN-1#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722EGN-1#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722EGN-2#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722EGN-2#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722HGN-1#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722HGN-1#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722IGN-1#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722IGN-1#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722IGN-2#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3722IGN-2#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 10, 2022 - 22_0177 Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL
		PCN22_0177_Form Material_Report Delta Qualification Matrix
LTC3722EGN-1#PBF	PRODUCTION
LTC3722EGN-1#TRPBF	PRODUCTION
LTC3722EGN-2#PBF	PRODUCTION
LTC3722EGN-2#TRPBF	PRODUCTION
LTC3722HGN-1#PBF	PRODUCTION
LTC3722HGN-1#TRPBF	PRODUCTION
LTC3722IGN-1#PBF	PRODUCTION
LTC3722IGN-1#TRPBF	PRODUCTION
LTC3722IGN-2#PBF	PRODUCTION
LTC3722IGN-2#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Protection Switches & Controllers 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LTC3722-1
LTC3722-2

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

LTC3722-1 Demo Board | Isolated Full-Bridge, 36V to 72V Input, VOUT = 12V @ 35A

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Product Details

Demonstration circuit 607 is an Isolated Full-Bridge Converter featuring the LTC3722, LTC4440, LTC3901, and LT1431. This circuit was designed to demonstrate the phase-shifted full bridge power supply to generate 12V at 35A from a typical telecom input voltage range of 36 to 72V. Isolation voltage is 1500VDC.

Resources

DC607A - Design File
5/27/2015

DC607A - Schematic
5/27/2015

DC607A - Demo Manual
4/24/2017

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