LT3964

Obsolete

LT3964

Dual 36V Synchronous 1.6A Buck LED Driver with I²C

Obsolete

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Part Models 4

1ku List Price

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Features

Wide Input Voltage Range: 4V to 36V
Two Independent 1.6A/40V Synchronous Bucks
I²C Interface for Internal True Color PWM^™ Dimming (8192:1), Analog Dimming and Fault Reporting
1000:1 External True Color PWM Dimming and 10:1 External Analog Dimming
PMOS Switch Driver for PWM and Output Disconnect
±3% Constant Current Regulation
Adjustable Frequency: 200kHz to 2MHz
Frequency Synchronization with Clock Output
Programmable OPENLED Protection with Reporting
Short-Circuit Protection with Reporting
Programmable Undervoltage Lockout with Hysteresis
Internal Compensation
9 Unique Device Addresses for I²C
Available in 5mm × 6mm 36-Lead QFN Package

Additional Details

The LT3964 is a dual synchronous step-down DC/DC converter with I²C interface designed to operate as a constant-current and constant-voltage source and is ideal for driving LEDs. The fixed frequency and peak current mode topology result in stable operation over a wide range of supply and output voltages. The ground referred voltage FB pin serves as the input for several LED protection features, and also allows the converter to operate as a constant-voltage source. The maximum output current is set by an external resistor, and the output current amplifier has a rail-to-rail common mode range. LT3964 uses an I²C interface to communicate with a microcontroller to read LED faults, write PWM and analog dimming registers and set fault masking. The I²C PWM input provides LED dimming ratios up to 8192:1. The I²C programmable CTRL register sets the gain of the external CTRL pin, and maximum current sense threshold, providing additional analog dimming capability.

Applications

General Purpose, Industrial, Medical and Automotive Lighting
Constant-Current, Constant-Voltage Source

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price

price unavailable

Technical Documents 4

LT3964: Dual 36V Synchronous 1.6A Buck LED Driver with I2C Data Sheet 07/28/2017

R580 Reliability Data 04/17/2019

DC2424A - Demo Manual 08/22/2017

Control Color of LED Stage and Architectural Lighting: Easy, Accurate 13-Bit Color using High Power 4 × 1A RGBW LEDs, I²C Control 10/31/2018

Design Resources 4

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
LT3964HUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT3964HUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT3964IUHE#PBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT3964IUHE#TRPBF	36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LT3964HUHE#PBF
Pin/Package Drawing
36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT3964HUHE#TRPBF
Pin/Package Drawing
36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT3964IUHE#PBF
Pin/Package Drawing
36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT3964IUHE#TRPBF
Pin/Package Drawing
36-Lead QFN (5mm x 6mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Apr 11, 2019

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

LT3964HUHE#PBF

Obsolete

LT3964HUHE#TRPBF

Obsolete

LT3964IUHE#PBF

PRODUCTION

LT3964IUHE#TRPBF

Obsolete

pdf

PCN19_0067_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

pdf

Qualification Results Summary

Detailed Parts List

pdf

Other

Jan 10, 2022

- 21_0152

Obsolescence of LT3964

LT3964HUHE#PBF

Obsolete

LT3964HUHE#TRPBF

Obsolete

LT3964IUHE#PBF

PRODUCTION

LT3964IUHE#TRPBF

Obsolete

pdf

PDN21_0152_Form

xls

Material_Report

Filter by Model

Part Models

Product Lifecycle

PCN

Apr 11, 2019

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

LT3964HUHE#PBF

Obsolete

LT3964HUHE#TRPBF

Obsolete

LT3964IUHE#PBF

PRODUCTION

LT3964IUHE#TRPBF

Obsolete

pdf

PCN19_0067_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

pdf

Qualification Results Summary

Detailed Parts List

pdf

Other

Jan 10, 2022

- 21_0152

Obsolescence of LT3964

LT3964HUHE#PBF

Obsolete

LT3964HUHE#TRPBF

Obsolete

LT3964IUHE#PBF

PRODUCTION

LT3964IUHE#TRPBF

Obsolete

pdf

PDN21_0152_Form

xls

Material_Report

DC2424A

LT3964 Demo Board | VIN = 5V to 36V driving two separate LED strings (1ALED/~3.6VLED) at 2MHz

LT3964 Demo Board | VIN = 5V to 36V driving two separate LED strings (1ALED/~3.6VLED) at 2MHz

Download

DC2424A

LT3964 Demo Board | VIN = 5V to 36V driving two separate LED strings (1ALED/~3.6VLED) at 2MHz

Buy Now View Details

Product Detail

The DC2424A is a 36V synchronous dual LED driver with I²C featuring the LT3964. It drives two separate LEDs (or channels of LEDs) at 1A when V_IN is between 5V and 36V. DC2424A runs at 2MHz switching frequency. Its two channels can drive separate LED strings which can have different currents, voltages, or dimming ratios. It can be controlled with I²C communications or it can be run in non-I²C mode with proper ADDR pin settings. It is protected against both open and short LED conditions and reports the faults. In I²C mode, faults can be enabled or disabled. Up to 9 different DC2424As can be placed on the same I²C bus with unique addresses. A graphical user interface (GUI) is available through QuikEval^™ when connected to a DC2026C Linduino^® One demo circuit.

Resources

PDF

DC2424A - Demo Manual

397.00K

PDF

DC2424A - Schematic

36.00K

ZIP

DC2424A - Design Files

1.00M

DC2424A

LT3964 Demo Board | VIN = 5V to 36V driving two separate LED strings (1ALED/~3.6VLED) at 2MHz

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.