LT3475
LT3475-1

PRODUCTION

Dual Step-Down 1.5A LED Driver

Data Sheet Product Selection Table
Part Models
8
1ku List Price
Starting From $4.19
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Part Details

  • True Color PWM™ Delivers Constant Color with 3000:1 Dimming Range
  • Wide Input Range: 4V to 36V Operating, 40V Maximum
  • Accurate and Adjustable Control of LED Current from 50mA to 1.5A
  • High Side Current Sense Allows Grounded Cathode LED Operation
  • Open LED (LT3475) and Short Circuit Protection
  • LT3475-1 Drives LED Strings Up to 25V
  • Accurate and Adjustable 200kHz to 2MHz Switching Frequency
  • Anti-Phase Switching Reduces Ripple
  • Uses Small Inductors and Ceramic Capacitors
  • Available in the Compact 20-Lead TSSOP Thermally Enhanced Surface Mount Package
LT3475
LT3475-1
Dual Step-Down 1.5A LED Driver
Dual Step-Down 1.5A LED Driver Efficiency Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Design Note 2

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
Analog Temperature Sensors 1
LTC2997
PRODUCTION Remote/Internal Temperature Sensor
Power Monitors 1
LT2940
PRODUCTION Power and Current Monitor
TimerBlox 1
LTC6992
TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)
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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LT3475
  • LT3475-1
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 6
schematic 7
schematic 8
schematic 9
schematic 10
DC1315A

LT3475IFE-1 Demo Board | Dual Step-Down LED Driver, 4V ≤ VIN ≤ 36V, VOUT up to 13V @ 1.5A (x2)

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Product Details

Demonstration circuit 1315 features the LT3475-1 dual step-down 1.5A LED driver in a 16-lead TSSOP thermally enhanced package. The demonstration circuit is designed to drive two 1.5A 4-LED strings (one on each channel) from an input voltage between 13V and 36V, but the start-up voltage is limited to 30V. The LT3475-1 operates from 4V to 36V so a lower input voltage can be applied with fewer LEDs. 
DC923A
LT3475 Demo Board
DC923A Demo Board DC923A Demo Board DC923A Demo Board DC923A Demo Board DC923A - Schematic
DC1315A
LT3475IFE-1 Demo Board | Dual Step-Down LED Driver, 4V ≤ VIN ≤ 36V, VOUT up to 13V @ 1.5A (x2)
DC1315A Demo Board DC1315A Demo Board DC1315A Demo Board DC1315A Demo Board DC1315A - Schematic

Latest Discussions

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RE: LT3475 DC1315A
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