LTC3901

PRODUCTION

Secondary Side Synchronous Driver for Push-Pull and Full-Bridge Converters

Part Models: 2
1ku List Price: Starting From $3.45

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Overview

N-Channel Synchronous MOSFET Driver
Programmable Timeout
Reverse Inductor Current Sense
Gate Drive Transformer Synchronization Sequence Monitor
Wide V_CC Supply Range: 4.5V to 11V
15ns Rise/Fall Times at V_CC = 5V, C_L = 4700pF
Undervoltage Lockout
Small 16-Lead SSOP Package

The LTC3901 is a secondary side synchronous rectifier driver designed to be used in isolated push-pull and full-bridge converter power supplies. The chip drives two external N-channel MOSFETs and accepts a transformer generated bipolar input to maintain synchronization with the primary side controller.

The LTC3901 provides a full range of protection features for the external MOSFETs. A programmable timeout function is included that disables both drivers when the synchronization signal is missing or incorrect. Additionally, the chip senses the output inductor current through the drain-source resistance of the two MOSFETs, turning off the MOSFETs if the inductor current reverses. The LTC3901 also shuts off the drivers if the supply is low or if the synchronization sequence is incorrect.

Applications

48V Input Isolated DC/DC Converters
Isolated Telecom Power Supplies
Distributed Power Step-Down Converters
Industrial Control System Power Supplies
Automotive and Heavy Equipment

Part Models: 2
1ku List Price: Starting From $3.45

Documentation

Data Sheet 1

LTC3901: Secondary Side Synchronous Driver for Push-Pull and Full-Bridge Converters Data Sheet 08/28/2007

Reliability Data 1

R368 Reliability Data 03/22/2018

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
LTC3901EGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3901EGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC3901EGN#PBF	PRODUCTION
LTC3901EGN#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC3901EGN#PBF	PRODUCTION
LTC3901EGN#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC3901EGN#PBF	PRODUCTION
LTC3901EGN#TRPBF	PRODUCTION

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

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC3901

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.

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