LT3591

PRODUCTION

LT3591

White LED Driver with Integrated Schottky in 3mm x 2mm DFN

PRODUCTION

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1ku List Price Starting From $1.71

Features

Drives Up to Ten White LEDs from a 3V Supply
High Side Sense Allows “One Wire Current Source”
Internal Schottky Diode
One Pin Dimming and Shutdown
80:1 True Color PWM^™ Dimming Range
42V Open LED Protection
1MHz Switching Frequency
±5% Reference Accuracy
V_IN Range: 2.5V to 12V
Requires Only 2.2µF Output Capacitor
Low Profile 8-Lead DFN Package
(3mm × 2mm × 0.75mm)

Additional Details

The LT3591 is a fixed frequency step-up DC/DC converter speciﬁcally designed to drive up to ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The device features a unique high side LED current sense that enables the part to function as a “one wire current source;” one side of the LED string can be returned to ground anywhere, allowing a simpler one wire LED connection. Traditional LED drivers use a grounded resistor to sense LED current, requiring a 2-wire connection to the LED string.

The high switching frequency allows the use of tiny inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. Few external components are needed: open-LED protection and the Schottky diode are all contained inside a low proﬁle 3mm × 2mm DFN package.

Applications

Cellular Phones
PDAs, Handheld Computers
Digital Cameras
MP3 Players
GPS Receivers

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

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FAQs

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Part Models 2

1ku List Price Starting From $1.71

Technical Documents 3

LT3591: White LED Driver with Integrated Schottky in 3mm × 2mm DFN Data Sheet 03/19/2007

R518 Reliability Data 03/26/2018

DC1124A - Demo Manual 09/24/2009

Design Resources 2

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
LT3591EDDB#TRMPBF	8-Lead DFN (3mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT3591EDDB#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LT3591EDDB#TRMPBF
Pin/Package Drawing
8-Lead DFN (3mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LT3591EDDB#TRPBF
Pin/Package Drawing
8-Lead DFN (3mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

DC1124A

LT3591EDDB Demo Board | Boost LED Driver, 3V ≤ VIN ≤ 9V, VOUT = 40V @ 20mA

LT3591EDDB Demo Board | Boost LED Driver, 3V ≤ VIN ≤ 9V, VOUT = 40V @ 20mA

Download

DC1124A

LT3591EDDB Demo Board | Boost LED Driver, 3V ≤ VIN ≤ 9V, VOUT = 40V @ 20mA

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Product Detail

Demonstration circuit 1124 is an LED Driver with Integrated Schottky featuring the LT3591. The LT3591 is a fixed frequency step-up current mode DC/DC converter that drives up to ten white LEDs in series at 20mA. The input voltage range of the demo board is from 3V to 9V. 42V (typical) LED open circuit protection is provided.

The high side current sensing feature of the LT3591 allows “one wire” current source, i.e. the low side of the LED string can return to ground anywhere.

Resources

PDF

DC1124A - Demo Manual

173.00K

PDF

DC1124A - Schematic

27.00K

ZIP

DC1124A - Design File

908.00K

DC1124A

LT3591EDDB Demo Board | Boost LED Driver, 3V ≤ VIN ≤ 9V, VOUT = 40V @ 20mA

LTspice 2

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.