LT3797

PRODUCTION

Triple Output LED Driver Controller

Data Sheet (Rev. C) Product Selection Table

Part Models: 6
1ku List Price: Starting From $5.83

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Part Details

Three Independent LED Driver Channels
Wide Input Voltage Range: 2.5V to 40V
V_IN Transient Ride-Through Up to 60V
Rail-to-Rail LED Current Sense: 0V to 100V
3000:1 PWM Dimming
TG Drivers for PMOS LED Disconnection
Operates in Boost, Buck Mode, Buck-Boost Mode, SEPIC or Flyback Topology
Open-LED Protection
Short-Circuit Protected Boost Capable
Fault Flags for Independent Channels
Programmable V_IN Undervoltage and Overvoltage Lockout
Adjustable Switching Frequency: 100kHz to 1MHz
Synchronizeable to an External Clock
CTRL Pins Provide Analog Dimming
Programmable Soft-Start
Low Profile 52-Lead 7mm x 8mm QFN and 48-Lead Exposed Pad LQFP

Part Models: 6
1ku List Price: Starting From $5.83

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
LT3797ELXE#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3797EUKG#PBF	52-Lead QFN (7mm x 8mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3797EUKG#TRPBF	52-Lead QFN (7mm x 8mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3797ILXE#PBF	48-Lead LQFP (7mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3797IUKG#PBF	52-Lead QFN (7mm x 8mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3797IUKG#TRPBF	52-Lead QFN (7mm x 8mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2021 - 21_0046 Transfer of LQFP and LQFP_EP from AEM to AET
		PCN21_0046_Form Material_Report Qualification Results Summary Other
LT3797ELXE#PBF	PRODUCTION
LT3797ILXE#PBF	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
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT3797

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

LT3797EUKG Demo Board: 2.5V to 40V input to 1A output at up to 50V

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Product Details

DC1784B is a triple boost LED driver featuring the LT3797 triple boost LED controller. It accepts an input voltage from 2.5V to 40V (with higher transient) and drives three independent strings of up to 50V LEDs at 1A. DC1784B features independent PWM and analog dimming of each of the three LED strings. Each of the three channels has its own short-circuit protection, open LED protection, and FAULT flag output.

Resources

DC1784B - Schematic
7/24/2017

DC1784B - Demo Manual
7/24/2017

DC1784B - Design Files
7/24/2017

LT3797EUKG Demo Board | Triple Boost LED Driver, 2.5V ≤ VIN ≤ 40VIN, 50VLED @ 1A (x3)

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Product Details

DC1784A is a triple boost LED driver featuring the LT3797 triple boost LED controller. It accepts an input voltage from 2.5V to 40V (with higher transient) and drives three independent strings of up to 50V LEDs at 1A. DC1784A features independent PWM and analog dimming of each of the three LED strings. Each of the three channels has its own short-circuit protection, open LED protection, and FAULT flag output.

Resources

DC1784A - Design Files
1/21/2014

DC1784A - Demo Manual
1/21/2014

DC1784A - Schematic
1/21/2014

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 Details

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.