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LT3755-2 Datasheet LED Controllers

Manufacturer: Linear Technology (now Analog Devices)

General Description

The LT®3755, LT3755-1 and LT3755-2 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs.

They drive a low side external N-channel power MOSFET from an internal regulated 7.15V supply.

The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages.

Overview

LT3755/LT3755-1/LT3755-2 40VIN, 75VOUT LED Controllers.

Key Features

  • n 3000:1 True Color PWM™ Dimming n Wide Input Voltage Range: 4.5V to 40V n Output Voltage Up to 75V n Constant-Current and Constant-Voltage Regulation n 100mV High Side Current Sense n Drives LEDs in Boost, Buck Mode, Buck-Boost Mode, SEPIC or Flyback Topology n Adjustable Frequency: 100kHz to 1MHz n Open LED Protection n Programmable Undervoltage Lockout with Hysteresis n Improved Open LED Status Pin (LT3755-2) n Frequency Synchronization (LT3755-1) n PWM Disconnect Switch Driver n.