LT3761A

PRODUCTION

60V_IN LED Controller with Internal PWM Generator

Data Sheet (Rev. A) Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.84

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Overview

3000:1 True Color PWM^™ Dimming for LEDs
Wide V_IN Range: 4.5V to 60V
Rail-to-Rail Current Sense Range: 0V to 80V
Programmable PWM Dimming Signal Generator
Constant Current (±3%) and Constant-Voltage (±2%) Regulation
Analog Dimming
Drives LEDs in Boost, SEPIC, Inverting, Buck Mode, Buck-Boost Mode, or Flyback Configuration

Output Short-Circuit Protected Boost
Open LED Protection and Reporting
Adjustable Switching Frequency: 100kHz to 1MHz
Programmable V_IN UVLO with Hysteresis
C/10 Indication for Battery Chargers
Low Shutdown Current: <1μA
Thermally Enhanced 16-Lead MSOP Package
AEC-Q100 Qualified for Automotive Applications

The LT3761A is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761A is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A voltage feedback pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size.

The LT3761A senses output current at the high side or at the low side of the load. The PWM input can be configured to self-oscillate at fixed frequency with duty ratio programmable from 4% to 96%. The LT3761A offers improved accuracy of internal PWM dimming over LT3761. When driven by an external signal, the PWM input provides LED dimming ratios of up to 3000:1. The CTRL input provides additional analog dimming capability.


	NOTES
LT3761A	Higher PWM Dimming Accuracy at Lower LED Current Levels
LT3761-1	Frequency Synchronization
LT3761	Open LED Status Pin

Applications

High Voltage LED Strings >100V with Ground Referred Current Sense
Grounded Anode LEDs
Battery and SuperCap Chargers
Accurate Current Limited Voltage Regulators

Part Models: 8
1ku List Price: Starting From $3.84

Documentation

Data Sheet 1

LT3761A: 60V_IN LED Controller with Internal PWM Generator Data Sheet (Rev.A) 05/02/2016

Reliability Data 1

R518 Reliability Data 03/26/2018

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
LT3761AEMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3761AEMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3761AEMSE#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3761AEMSE#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3761AIMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3761AIMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3761AIMSE#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3761AIMSE#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3761AEMSE#PBF	PRODUCTION
LT3761AEMSE#TRPBF	PRODUCTION
LT3761AIMSE#PBF	PRODUCTION
LT3761AIMSE#TRPBF	PRODUCTION
Jul 19, 2021 - 21_0140 LT3761/LT3761-1/LT3761A Data Sheet Limit Change
		PCN21_0140_Form Material_Report Detailed Change Description Detailed Change Description Datasheet Specification Comparison Datasheet Specification Comparison Delta Qualification Matrix
LT3761AEMSE#PBF	PRODUCTION
LT3761AEMSE#TRPBF	PRODUCTION
LT3761AEMSE#WPBF	PRODUCTION
LT3761AEMSE#WTRPBF	PRODUCTION
LT3761AIMSE#PBF	PRODUCTION
LT3761AIMSE#TRPBF	PRODUCTION
LT3761AIMSE#WPBF	PRODUCTION
LT3761AIMSE#WTRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LT3761AEMSE#PBF	PRODUCTION
LT3761AEMSE#TRPBF	PRODUCTION
LT3761AIMSE#PBF	PRODUCTION
LT3761AIMSE#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
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode

Parts	Product Life Cycle	Description
LT3761 LT3761-1		60V_IN LED Controller with Internal PWM Generator

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT3761
LT3761A

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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