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LTC4364 - Surge Stopper with Ideal Diode

LT3761 - 60VIN LED Controller with Internal PWM Generator

Features

  • 3000:1 True Color PWM™ Dimming for LEDs
  • Wide VIN Range: 4.5V to 60V
  • Rail-to-Rail Current Sense Range: 0V to 80V
  • Programmable PWM Dimming Signal Generator
  • Constant Current (±3%) and Constant-Voltage (±2%) Regulation
  • Analog Dimming
  • Drives LEDs in Boost, SEPIC, Inverting, Buck Mode, Buck-Boost Mode, or Flyback Configuration
  • Output Short-Circuit Protected Boost
  • Open LED Protection and Reporting
  • Adjustable Switching Frequency: 100kHz to 1MHz
  • Programmable VIN UVLO with Hysteresis
  • C/10 Indication for Battery Chargers
  • Low Shutdown Current: <1μA
  • Thermally Enhanced 16-Lead MSOP Package

Typical Application

LT3761 Typical Application
LT3761 Typical Application

Description

The LT®3761 is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A voltage feedback pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size.

The LT3761 senses output current at the high side or at the low side of the load. The PWM input can be configured to self-oscillate at fixed frequency with duty ratio programmable from 4% to 96%. When driven by an external signal, the PWM input provides LED dimming ratios of up to 3000:1. The CTRL input provides additional analog dimming capability.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

MS-16

LT3761 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3761EMSE#PBF MSOP 16 E $4.57 $3.20 View
LT3761EMSE#TRPBF MSOP 16 E $3.26 View
LT3761HMSE#PBF MSOP 16 H $5.50 $3.85 View
LT3761HMSE#TRPBF MSOP 16 H $3.91 View
LT3761IMSE#PBF MSOP 16 I $5.07 $3.55 View
LT3761IMSE#TRPBF MSOP 16 I $3.61 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1772A LT3761EMSE Demo Board I High Voltage LED Controlle $175.00
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Applications

  • High Voltage LED Strings >100V with Ground Referred Current Sense
  • Grounded Anode LEDs
  • Battery and SuperCap Chargers
  • Accurate Current Limited Voltage Regulators

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