LT3967

RECOMMENDED FOR NEW DESIGNS

1.3A Eight-Switch Matrix LED Dimmer with CRC-8

Data Sheet (Rev. 0) Product Selection Table

Part Models: 4
1ku List Price: Starting From $4.62

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Part Details

Eight Independent 15V/110mΩ NMOS Switches
Controls LED Dimming of Strings Up to 54V
I²C Serial Interface with Programmable Address
I²C Packet Error Checking with CRC-8
Programmable 256:1 (8-Bit) PWM Dimming
11-Bit Precision Exponential Fade with Programmable Time
Independent On/Off Control for Each Switch

Programmable Shorted/Open LED Threshold with Fault Reporting
Internal PWM Signal Generator
Programmable Watchdog Timer
Accurate V_IN Referred Enable Pin
User Defined Power-Up/Reset State of Switches
Thermally Enhanced TSSOP Package

Part Models: 4
1ku List Price: Starting From $4.62

Documentation

Data Sheet 1

LT3967: 1.3A Eight-Switch Matrix LED Dimmer with CRC-8 Data Sheet (Rev.0) 08/28/2020

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
LT3967EFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3967EFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3967JFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3967JFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

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
LT3967EFE#PBF	PRODUCTION
LT3967EFE#TRPBF	PRODUCTION
LT3967JFE#PBF	PRODUCTION
LT3967JFE#TRPBF	PRODUCTION

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

Evaluation Kits

LT3960 and LT3967 Demo Board | 1.3A 8-Switch Matrix LED Dimmer with I2C to CAN-Physical Layer Transceiver

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Product Details

Demonstration circuit 2686A is a 1.3A 8-switch matrix LED dimmer system with an I²C to CAN-physical transceiver featuring the LT3967 and LT3960. This demonstration circuit connects directly to a LED string and LED driver demonstration circuit to allow for independent dimming control of up to 8 channels of LEDs. A Linduino^® One demonstration circuit is used to interface with the board and can connect in one of two different ways:

Connect directly to a Linduino One demonstration circuit with a QuikEval^™ ribbon cable.
Connect using the LT3960 break-off board to connect to the I²C master device, but pass data over two twisted pair lines to the LT3960 on the main PCB.

The LT3967 matrix dimmer features 8 individually con-trolled 1.3A rated floating NMOS switch channels and can support up to 56V of LEDs per device. The channels of the LT3967 can be configured for series connections, or non-series connections. Additional DC2686A demo circuits can be connected in series for higher number of LEDs, or in parallel to allow for higher current operation. Resistors are used to configure both the I²C slave address as well as the default start-up state. The default configuration for DC2686A sets the I²C address as 0000 with all LEDs off. See the LT3967 data sheet for details.

The LT3960 I²C to CAN-Physical transceiver is used to send and receive I²C data through harsh or noisy environments at up to 400kb/s using the CAN-Physical layer for differential signaling over twisted pair connections. Both SDA and SCL data lines are converted to differential signals and are shared between devices connected to the bus. This allows for physical separation of the I²C source with the LT3960 transceiver board and the LT3967 main PCB along with the LED driver.

This demo circuit is designed to be easily configured and interfaced with a compatible low output capacitance LED driver and LED string. It can easily be directly attached to a buck LED driver or a floating buck-mode LED driver. More sophisticated setups with series matrix dimmers for higher number of LEDs such as 12 or 16 is possible. Please consult factory applications for details or look for more details on analog.com.

The LT3967 and LT3960 data sheets give complete description of the parts, their operation and applications information. The data sheets must be read in conjunction with the demo manual for demonstration circuit DC2686A. The LT3967EFE is assembled in a thermally enhanced 28-lead TSSOP package. The LT3960EMSE is assembled in a 10-lead MSOP package.