LT3754 - 16-Channel × 50mA LED Driver

Features

  • Up to 45V of LEDs × 50mA, 16-Channel LED Driver
  • Wide Input Range : 6V to 40V (4.5V to 13V, VIN Connected to INTVCC)
  • ±2.8% LED Current Matching at 20mA (Typ ±0.7%)
  • Up to 3000:1 True Color PWM™ Dimming Range
  • Single Resistor Sets LED Current (10mA to 50mA)
  • LED Current Regulated Even for PVIN > VOUT
  • Output Adapts to LED VF for Optimum Efficiency
  • Fault Flag + Protection for Open LED Strings
  • Protection for LED Pin to VOUT Short
  • Parallel Channels for Higher LED Current
  • Programmable LED Current Derating vs Temperature
  • Accurate Undervoltage Lockout Threshold with Programmable Hysteresis
  • Programmable Frequency (100kHz to 1MHz)
  • Synchronizable to an External Clock

Typical Application

LT3754 Typical Application
LT3754 Typical Application

Description

The LT3754 is a 16-channel LED driver with a step-up DC/DC controller capable of driving up to 45V of LEDs. Each channel contains an accurate current sink with ±2.8% current matching. Channels follow a master programmable current to allow between 10mA to 50mA of LED current per string. Channels can be paralleled for higher LED current. Output voltage adapts to variations in LED VF for optimum efficiency and open LED faults do not affect the operation of connected LED strings.

The LT3754 allows a PWM dimming range up to 3000:1 and an analog dimming range up to 25:1. Operating frequency can be programmed from 100kHz up to 1MHz using a single resistor or synchronized to an external clock.

Additional features include: programmable maximum VOUT for open LED protection, a fault flag for open LED, programmable LED current derating vs temperature, micropower shutdown and internal soft-start. The LT3754 is available in a thermally enhanced 5mm × 5mm 32-pin QFN Package.

Packaging

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

QFN-32

LT3754 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3754EUH#PBF QFN 32 E $6.07 $4.25 View
LT3754EUH#TRPBF QFN 32 E $4.31 View
LT3754IUH#PBF QFN 32 I $7.14 $5.00 View
LT3754IUH#TRPBF QFN 32 I $5.06 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
DC1436A LTC3754EUH Demo Board | 16-Channel x 40mA LED Driver with 1% Channel-to-Channel Current Matching $150.00
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Click here to view our complete list of demo boards

Applications

  • Automotive, Notebook and TV Monitor Backlighting

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Design Tools

LTspiceIV

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Models for the following parts are available in LTspice IV:
LT3754

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