LT3595

PRODUCTION

LT3595

16 Channel Buck Mode LED Driver

PRODUCTION

16-Channel LED Driver (Three LEDs per Channel), 20mA Current slide

16-Channel LED Driver (Three LEDs per Channel), 20mA Current

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1ku List Price Starting From $7.50

Features

4.5V to 45V Input Supply Range
Up to 50mA LED Current per Channel
100mA, 45V Internal Switches
8% Relative LED Current Match at 20mA
16 Independent LED Channels
5000:1 True Color PWM^™ Dimming Range
LEDs Disconnected in Shutdown
Internal Schottky Diodes
Low Quiescent Current
2MHz Switching Frequency
R_SET Pin Sets Master LED Current
Typical Efficiency: 92%
Open LED Detection and Thermal Protection
56-Pin 5mm × 9mm × 0.75mm QFN Package

Additional Details

The LT3595 is a high performance LED Driver designed to drive sixteen independent channels of up to 10 LEDs at currents up to 50mA. Series connection of the LEDs provides identical LED currents resulting in uniform brightness. Power switches, Schottky diodes, and compensation components are all internal, providing a small converter footprint and lower component cost. The high 2MHz switching frequency permits the use of tiny, low proﬁ le inductors and capacitors. A fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltage.

A single external resistor sets the LED current for all sixteen channels, and dimming is then controlled for each channel by pulse width modulating the individual PWM pins. Relative current matching among the sixteen drivers is 8% and the PWM dimming range is 5000:1. The part is available in a 5mm x 9mm x 0.75mm 56-pin QFN package.

Applications

LED Video Billboards
LCD Televisions
Stadium and Advertising Displays

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Support

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

Visit the ADI Support Page

Ask the ADI community for help.

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FAQs

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Part Models 2

1ku List Price Starting From $7.50

Technical Documents 4

LT3595: 16 Channel Buck Mode LED Driver Data Sheet 08/07/2007

R518 Reliability Data 03/26/2018

DC1199A - Demo Manual 09/24/2009

16-Channel LED Driver Drives up to 160 White LEDs with 5000:1 PWM Dimming 10/01/2007

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
LT3595EUHH#PBF	56-Lead QFN (5mm x 9mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT3595EUHH#TRPBF	56-Lead QFN (5mm x 9mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LT3595EUHH#PBF
Pin/Package Drawing
56-Lead QFN (5mm x 9mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LT3595EUHH#TRPBF
Pin/Package Drawing
56-Lead QFN (5mm x 9mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

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DC1199A

LT3595EUHH Demo Board | 16-Channel Buck Mode LED Driver, 15V ≤ VIN ≤ 45V, VLED up to 12V @ 30mA (x16)

DC1199A

LT3595EUHH Demo Board | 16-Channel Buck Mode LED Driver, 15V ≤ VIN ≤ 45V, VLED up to 12V @ 30mA (x16)

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Product Detail

Demonstration circuit 1199A is a 16-Channel Buck Mode LED Driver featuring the LT3595EUHH. The circuit is optimized to drive 16 channels of three series LEDs at 30mA, though the LT3595 is capable of driving up to 10 LEDs at 50mA per channel. Each channel has three series white LEDs and they are stuffed on the PCB. The LT3595 features a wide input voltage range, integrated components, externally set LED current, high pwm dimming range, high efficiency, shutdown, open LED protection, and 2MHz switching frequency.

The 100mA, 45V fully integrated switches help drive up to 10 LEDs per channel in series at 50mA each. Internal catch diodes reduce external component count and circuit size. PWM dimming is as high as 1000:1 at 100Hz over the entire input voltage range.

There are three input power terminals: V_IN ranges from 15V up to 45V and is used for powering the LEDs, V_CC powers the LT3595 and the pwm gates, and µV_IN (6-12V) powers the onboard PIC microprocessor. The PIC allows the board to demonstrate some preprogrammed patterns and PWM dimming. Although the range of the LT3595 V_CC pin goes down to 3V, 5V is needed for the PWM signal gates to work properly with the PIC.

Resources

ZIP

DC1199A - Design File

1.00M

PDF

DC1199A - Demo Manual

695.00K

PDF

DC1199A - Schematic

53.00K

DC1199A

LT3595EUHH Demo Board | 16-Channel Buck Mode LED Driver, 15V ≤ VIN ≤ 45V, VLED up to 12V @ 30mA (x16)

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.