LT3519

• Product introduction

LT3519LT3519-1/LT3519-2 - LED drivers with integrated Schottky diodes

peculiarity

• Up to 3000:1 True Color PWM^TMDimming
• Wide input voltage range:
  It operates from 3V to 30V
  Transient protection up to 40V
• Rail-to-rail LED current sensing 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 topologies
• Open LED protection and open LED status pins
• Programmable undervoltage lockout with hysteresis
• Fixed Frequency: 400kHz (LT3519), 1MHz (LT3519-1), 2.2MHz (LT3519-2)
• Internal compensation
• The CTRL pin provides analog dimming
• Low shutdown current:
• 16-pin MSOP package

description

LT^®The 3519/LT3519-1/LT3519-2 are fixed frequency step-up DC/DC converters designed to drive LEDs. It features an internal 45V, 750mA low-side switch and Schottky diode. The combination of a traditional voltage feedback and a unique rail-to-rail current sense feedback allows the converter to function as a constant voltage source or constant current source. Internal compensation simplifies the application. The device has rail-to-rail LED current-sense pins that provide maximum flexibility in selecting a converter configuration to drive the LEDs. The LED current can be set externally with a sense resistor. The external PWM provides PWM dimming up to 3000:1, while the CTRL input provides analog dimming.

apply

• Car
• industry
• Constant current source
• Current-limited constant voltage source