LT3952A

RECOMMENDED FOR NEW DESIGNS

60V LED Driver with 4A Switch Current

Data Sheet (Rev. B) Product Selection Table

Part Models: 12
1ku List Price: Starting From $3.48

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Overview

4000:1 True Color PWM^™ Dimming
4A, 60V Internal DMOS Switch
Wide Input Voltage Range: 3V to 42V
0V to 60V Output Current Regulation with Monitor
PMOS Switch Driver for PWM and Output Disconnect
LED Short-Circuit Protection and SHORTLED Flag
Internal Spread Spectrum Frequency Modulation
Constant-Current and Constant-Voltage Regulation

Input Current Limit and Monitor
Adjustable Frequency: 200kHz to 3MHz, Synchronizable to an External Clock
10:1 Analog Dimming
Programmable Open-LED Protection with OPENLED Flag
Programmable V_IN Undervoltage and Overvoltage Lockout
Available in a 28-Lead TSSOP Package
AEC-Q100 Qualified for Automotive Applications

The LT3952A is a current mode step-up DC/DC converter with an internal, 60V, 80mΩ DMOS power switch. The LT3952A is specifically designed to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage source.

Programmable switching frequency with optional spread-spectrum modulation provides EMI reduction, while still allowing optimization of the external components for efficiency or component size. The LED current is programmable with an external sense resistor, and can be adjusted from zero to full scale with a voltage at the CTRL pin. The external PWM input provides LED ON/OFF control and 4000:1 dimming ratio, and an internal PWM generator delivers the efficiency of PWM dimming to standalone or I/O limited applications. The LT3952A is available in the thermally enhanced 28-lead TSSOP package.

Applications

Display Backlighting
Automotive and Avionic Lighting
Accurate Current-Limited Voltage Regulators

Part Models: 12
1ku List Price: Starting From $3.48

Documentation

Data Sheet 1

LT3952A: 60V LED Driver with 4A Switch Current Data Sheet (Rev.B) 06/17/2019

Reliability Data 1

R580 Reliability Data 04/17/2019

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
LT3952AEFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AEFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AEFE#WPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AEFE#WTRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AHFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AHFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AHFE#WPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AHFE#WTRPBF	TSSOP W/ THERMAL PAD	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AIFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AIFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AIFE#WPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3952AIFE#WTRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive)
		PCN25_0043_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LT3952AEFE#PBF	PRODUCTION
LT3952AEFE#TRPBF	PRODUCTION
LT3952AEFE#WPBF	PRODUCTION
LT3952AEFE#WTRPBF	PRODUCTION
LT3952AHFE#PBF	PRODUCTION
LT3952AHFE#TRPBF	PRODUCTION
LT3952AHFE#WPBF	PRODUCTION
LT3952AHFE#WTRPBF	PRODUCTION
LT3952AIFE#PBF	PRODUCTION
LT3952AIFE#TRPBF	PRODUCTION
LT3952AIFE#WPBF	PRODUCTION
LT3952AIFE#WTRPBF	PRODUCTION
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LT3952AEFE#PBF	PRODUCTION
LT3952AEFE#TRPBF	PRODUCTION
LT3952AEFE#WPBF	PRODUCTION
LT3952AEFE#WTRPBF	PRODUCTION
LT3952AHFE#PBF	PRODUCTION
LT3952AHFE#TRPBF	PRODUCTION
LT3952AHFE#WPBF	PRODUCTION
LT3952AHFE#WTRPBF	PRODUCTION
LT3952AIFE#PBF	PRODUCTION
LT3952AIFE#TRPBF	PRODUCTION
LT3952AIFE#WPBF	PRODUCTION
LT3952AIFE#WTRPBF	PRODUCTION

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

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT3952
LT3952A

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

LT3952AEFE Demo Board | 2MHz LED Driver, 8V ≤ VIN ≤ 28V, IOUT = 330mA at 40V

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Product Details

Demonstration circuit DC2361A is a 2MHz 60V LED driver with internal 4A switch featuring the LT3952A monolithic LED driver. It accepts an input voltage from 8V to 28V (with transient to 36V) and boosts to a single string of LEDs up to 40V at 330mA. DC2361A features an integrated 4A switch, constant current and constant voltage output control as well as input current limit and monitoring.

Resources

DC2361A - Design Files
6/8/2015

DC2361A - Schematic
6/8/2015

DC2361A - Demo Manual (Rev.A)
6/8/2015

LT3952AEFE Demo Board | CC/CV Boost LED Driver, 5V ≤ VIN ≤ 36V, VLED = VIN up to 50@ 330mA

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Product Details

Demonstration Circuit DC2013A is a 60V LED driver with internal 4A switch featuring the LT3952A monolithic LED driver. It accepts an input voltage from 5V to 36V (with transient to 42V) and boosts to a single string of LEDs up to 50V LEDs at 330mA. DC2013A features an integrated 4A switch, constant-current and constant-voltage output control as well as input current limit and monitoring.