LT3519
LT3519-1
LT3519-2

PRODUCTION

LED Driver with Integrated Schottky Diode

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Overview

  • Up to 3000:1 True Color PWM™ Dimming
  • Wide Input Voltage Range
    • Operation from 3V to 30V
    • Transient Protection to 40V
  • Rail-to-Rail LED Current Sense from 0V to 45V
  • 45V, 750mA Internal Switch
  • Internal Schottky Diode
  • Constant-Current and Constant-Voltage Regulation
  • Boost, SEPIC, Buck-Boost Mode or Buck Mode Topology
  • Open LED Protection and Open LED Status Pin
  • Programmable Undervoltage Lockout with Hysteresis
  • Fixed Frequency: 400kHz (LT3519), 1MHz (LT3519-1), 2.2MHz (LT3519-2)
  • Internal Compensation
  • CTRL Pin Provides Analog Dimming
  • Low Shutdown Current: <1μA
  • 16-Lead MSOP Package
LT3519
LT3519-1
LT3519-2
LED Driver with Integrated Schottky Diode
4W Boost Automotive LED Driver LED Current vs VIN Product Package 1
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Documentation

Data Sheet 1

User Guide 2

Technical Articles 1

Data Sheet

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

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital to Analog Converters (DACs) 1
LTC2657
PRODUCTION Octal I2C 16-/12-Bit Rail-to-Rail DACs with 10ppm/°C Max Reference
Hot Swap Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
Pulse-Width Modulation (PWM) & Pulse Generators 1
LTC6992
TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)
Temperature Sensors 1
LTC2997
PRODUCTION Remote/Internal Temperature Sensor
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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LT3519
  • LT3519-1
  • LT3519-2
LTspice

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

eval board
schematic 1
DC1612A-A

LT3519EMS-1 Demo Board | SEPIC LED Driver, 1MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA

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Product Details

Demonstration Circuit 1612A is a fully integrated LED driver with 750mA switch current featuring the LT3519-1 (1MHz switching) and the LT3519-2 (2.2MHz switching). The multitopology LT3519 operates with an input voltage up to 30V (40V transients) but the demo board has open LED protection set at 18V. The board is optimized to drive an LED string of up to 16V at 150mA in a SEPIC topology. The demo board operates from a 6V to 24V input voltage range.


LT3519 features in a low-side integrated 45V 750mA power switch, integrated catch diode, integrated compensation, 3000:1 PWM dimming ratio, overvoltage protection, shutdown control pin and analog LED current dimming control.

eval board
schematic 2
DC1612A-B

LT3519EMS-2 Demo Board | SEPIC LED Driver, 2.2MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA

Buy Now View Details

Product Details

Demonstration Circuit 1612A is a fully integrated LED driver with 750mA switch current featuring the LT3519-1 (1MHz switching) and the LT3519-2 (2.2MHz switching). The multitopology LT3519 operates with an input voltage up to 30V (40V transients) but the demo board has open LED protection set at 18V. The board is optimized to drive an LED string of up to 16V at 150mA in a SEPIC topology. The demo board operates from a 6V to 24V input voltage range.


LT3519 features in a low-side integrated 45V 750mA power switch, integrated catch diode, integrated compensation, 3000:1 PWM dimming ratio, overvoltage protection, shutdown control pin and analog LED current dimming control.

eval board
schematic 3
DC1482A

LT3519EMS Demo Board | Boost LED Driver with Integrated Schottky Diode, 6V ≤ VIN ≤ 30V, VLED = 38V @ 100mA

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Product Details

Demonstration Circuit 1482 is a fully integrated, multitopology LED driver with a 45V, 750mA power switch featuring the LT3519. The board is optimized to drive a 100mA LED string from a 6V to 30V input power supply using a boost topology.The DC1482 has overvoltage protection at just above 40V if the LEDs are open or not properly attached to the terminals on the PCB.


The high input voltage range, integrated low-side power switch and catch diode, integrated compensation, low voltage floating current sense amplifier, high PWM dimming ratio, overvoltage protection, shutdown control pin, analog LED current dimming control, and fixed 400kHz switching frequency make the LT3519 an extremely versatile and powerful LED driving IC. 
DC1612A-A
LT3519EMS-1 Demo Board | SEPIC LED Driver, 1MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA
DC1612A-A - Schematic
DC1612A-B
LT3519EMS-2 Demo Board | SEPIC LED Driver, 2.2MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA
DC1612A-A - Schematic
DC1482A
LT3519EMS Demo Board | Boost LED Driver with Integrated Schottky Diode, 6V ≤ VIN ≤ 30V, VLED = 38V @ 100mA
DC1482A - Schematic

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