LT3745

PRODUCTION

16-Channel 50mA LED Driver with Buck Controller

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $5.90

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Part Details

6V to 55V Power Input Voltage Range
16 Independent LED Outputs Up to 75mA/36V
±3% LED Current Matching at 50mA (Typ ±1%)
6-Bit Dot Correction Current Adjustment
12-Bit Grayscale PWM Dimming
0.5μs Minimum LED On-Time
Adaptive LED Bus Voltage for High Efficiency
Cascadable 30MHz Serial Data Interface
Full Diagnostic and Protection: Individual Open/Short LED and Overtemperature Fault
40-Lead 6mm × 6mm QFN Package

Part Models: 4
1ku List Price: Starting From $5.90

Documentation

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
LT3745EUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3745EUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3745IUJ#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3745IUJ#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LT3745EUJ#PBF	PRODUCTION
LT3745EUJ#TRPBF	PRODUCTION
LT3745IUJ#PBF	PRODUCTION
LT3745IUJ#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
Digital Temperature Sensors 1
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor
Offline Power Factor Correction (PFC) Controllers 1
LT3798	PRODUCTION	Isolated No Opto-Coupler Flyback Controller with Active PFC
Serial Bus Buffers, Extenders, and Accelerators 1
LTC4311	PRODUCTION	Low Voltage I²C/SMBus Accelerator

Parts	Product Life Cycle	Description
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor
LTC4311	PRODUCTION	Low Voltage I²C/SMBus Accelerator
LT3798	PRODUCTION	Isolated No Opto-Coupler Flyback Controller with Active PFC

Tools & Simulations

LTspice 1

LT3745 - LED Driver IC

Models for the following parts are available in LTspice:

LT3745

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

LT3745 Demo Board | Three 16-Channel Buck RGB LED Drivers, Requires DC590B, 9V ≤ VIN ≤ 40V, VLED = 3.4V or 4.2V @ 50mA per Channel

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Product Details

Demonstration circuit 1608A features the LT3745, a 16-channel 50mA buck LED driver controller and serial interface. Each channel drives a single LED. Three LT3745's are connected in series with each one controlling a color in a 16 LED RGD array. Each channel has an individually adjustable 12-bit (4096-step) grayscale PWM dimming control and a 6-bit (64-step) dot correction current adjustment.

The demo board input voltage range is 9V to 40V and the buck controller outputs 3.4V or 4.2V depending on the color of the LED.

Resources

DC1608A - Demo Manual
11/7/2011

DC1608A - Design Files
10/30/2011

DC1608A - Schematic
12/21/2011

Software

DC1608A - Software
9.00M

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