LT3965
LT3965-1
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LT3965
LT3965-1

8-Switch Matrix LED Dimmer

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Linduino LT3965 - Linduino.CPP File Download 4.00KB Linduino LT3965 - Linduino Header File Download 4.00KB Linduino LT3965 - DC2218A.ino Download 101.00KB
Part Models 16
1ku List Price Starting From $4.72
Features
  • Eight Independent 17V 330mΩ NMOS Switches
  • Independent On/Off/Dimming Control of 1 to 4 LEDs for Each Switch
  • I2C Multidrop Serial Interface with Programmable Open LED and Shorted LED Fault Reporting
  • 16 Unique I2C Addresses
  • VDD Range: 2.7V to 5.5V and VIN Range: 8V to 60V
  • Digital Programmable 256:1 PWM Dimming
  • Fade Transition Between PWM Dimming States
  • Optional Internal Clock Generator or External Clock Source for PWM Dimming
  • Open LED Overvoltage Protection
  • Flicker Free PWM Dimming
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LT3965/LT3965-1 is an LED bypass switching device for dimming individual LEDs in a string using a common current source. It features eight individually controlled floating source 17V/330mΩ NMOS switches. The eight switches can be connected in parallel and/or in series to bypass current around one or more LEDs in a string. The LT3965 is initialized with all switches off (LEDs on), and the LT3965-1 is initialized with all switches on (LEDs off)The LT3965/LT3965-1 uses the I2C serial interface to communicate with the microcontroller. Each of the eight channels can be independently programmed to bypass the LED string in constant on or off, or PWM dimming with or without fade transition. Using the fade option provides 11-bit resolution logarithmic transition between PWM dimming states. The LT3965/LT3965-1 provides an internal clock generator and also supports external clock source for PWM dimming. The LT3965/LT3965-1 reports fault conditions for each channel such as open LED and shorted LED. The four address select pins allow 16 LT3965/LT3965-1 devices to share the I2C bus. The device is available in a 28-lead TSSOP package.

Applications

  • Automotive LED Headlight Clusters
  • Large LED Displays
  • Automated Camera Flash Equipment
  • RGBW Color Mixing Lighting
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file View Data Sheet (Rev.B)
Documentation View All Documentation
Linduino LT3965 - Linduino.CPP File Download 4.00KB Linduino LT3965 - Linduino Header File Download 4.00KB Linduino LT3965 - DC2218A.ino Download 101.00KB
Part Models 16
1ku List Price Starting From $4.72
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LT3965
LT3965-1

Documentation

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Data Sheet

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UPDATED 04/18/2017
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LT3965: 8-Switch Matrix LED Dimmer Data Sheet (Rev.B)

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UPDATED 08/14/2016
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LT3965: 8スイッチのマトリックスLED調光器 データシート

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User Guide

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UPDATED 12/16/2015
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DC2218A - Demo Manual redirect icon

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UPDATED 07/11/2016
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Create Colorful and Bright LED Light with an LED Matrix Dimmer redirect icon

5.00M

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UPDATED 07/18/2016
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矩阵式 LED 调光器助力实现色彩鲜艳亮丽的 LED 灯 redirect icon

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UPDATED 02/01/2016
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Matrix LED Dimmer Enables Accurate Color Control and Pattern Production in RGBW LEDs redirect icon

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UPDATED 11/01/2015
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Control Individual LEDs in Matrix Headlights with Integrated 8-Switch Flicker-Free Driver redirect icon

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Documentation

Solutions Bulletin & Brochure 1

Matrix LED Dimmer

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3

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Video

2017-09-18

High Power Three-Channel LED Driver (LT3797)

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Video

2017-09-18

60V 8-Switch Matrix LED Dimmer (LT3965)

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Video

2017-09-18

60V LED Driver with Internal 4A Switch for Automotive Lighting (LT3952)

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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
LT3965EFE#PBF 28-Lead TSSOP w/ EP external-link
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LT3965EFE#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3965EFE#WPBF 28-Lead TSSOP w/ EP external-link
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LT3965EFE#WTRPBF 28-Lead TSSOP w/ EP external-link
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LT3965EFE-1#PBF 28-Lead TSSOP w/ EP external-link
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LT3965EFE-1#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3965EFE-1#WPBF 28-Lead TSSOP w/ EP external-link
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LT3965EFE-1#WTRPBF 28-Lead TSSOP w/ EP external-link
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LT3965IFE#PBF 28-Lead TSSOP w/ EP external-link
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LT3965IFE#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3965IFE#WPBF 28-Lead TSSOP w/ EP external-link
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LT3965IFE#WTRPBF 28-Lead TSSOP w/ EP external-link
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LT3965IFE-1#PBF 28-Lead TSSOP w/ EP external-link
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LT3965IFE-1#TRPBF 28-Lead TSSOP w/ EP external-link
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LT3965IFE-1#WPBF 28-Lead TSSOP w/ EP external-link
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LT3965IFE-1#WTRPBF 28-Lead TSSOP w/ EP external-link
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Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

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Apr 11, 2019

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Notification of Wafer Fab Location Change for 0.35 BCD Process

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

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LT3965EFE#TRPBF

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LT3965EFE#WTRPBF

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PCN22_0068_Form

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Notification of Wafer Fab Location Change for 0.35 BCD Process

LT3965EFE#PBF

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LT3965EFE#TRPBF

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LT3965EFE-1#PBF

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LT3965EFE-1#TRPBF

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LT3965IFE#PBF

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Software & Part Ecosystem

Evaluation Kits 1

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DC2218A

LT3965EFE/LT3797 Demo Board | 2-String Buck LED Driver with Matrix LED Dimmer; 9V ≤ VIN ≤ 30V, up to 30VLED @ 500mA (8 LEDs/String)

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DC2218A

LT3965EFE/LT3797 Demo Board | 2-String Buck LED Driver with Matrix LED Dimmer; 9V ≤ VIN ≤ 30V, up to 30VLED @ 500mA (8 LEDs/String)

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DC2218A
LT3965EFE/LT3797 Demo Board | 2-String Buck LED Driver with Matrix LED Dimmer; 9V ≤ VIN ≤ 30V, up to 30VLED @ 500mA (8 LEDs/String)
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Product Detail

Demonstration circuit DC2218A is a matrix LED dimmer system featuring the LT3965 8-switch matrix LED dimmer IC. There are 16 500mA LEDs that can be individually turned on, off, or PWM dimmed with two 8-switch LED dimmer LT3965 ICs. The two strings of LEDs are driven with two buck LED driver outputs of the LT3797 triple LED controller IC. The third channel of the LT3797 serves as a 30V pre-boost voltage regulator to provide a proper input voltage to the two buck LED driver channels. DC2218A can be driven from a 9V to 30V input and can survive transients up to 36V.

Resources

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DC2218A - Schematic Download

117.00K

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LT3965 GUI User Manual Download

2.00M

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DC2218A - Demo Manual Download

889.00K

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DC2218A - Design Files Download

2.00M

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Evaluation Kits1

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DC2218A

LT3965EFE/LT3797 Demo Board | 2-String Buck LED Driver with Matrix LED Dimmer; 9V ≤ VIN ≤ 30V, up to 30VLED @ 500mA (8 LEDs/String)

Tools & Simulations 1

Linduino

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

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