LT3492

PRODUCTION

Triple Output LED Driver with 3000:1 PWM Dimming

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Overview

  • True Color PWM™ Dimming Delivers Up to 3000:1 Dimming Ratio
  • Built-In Gate Driver for PMOS LED Disconnect
  • Three Independent Driver Channels with 600mA, 60V Internal Switches
  • Operates in Buck, Boost, Buck-Boost Modes
  • CTRL Pin Accurately Sets LED Current Sense Threshold Over a Range of 10mV to 100mV
  • Adjustable Frequency: 330kHz to 2.1MHz
  • Open LED Protection
  • Wide Input Voltage Range:
    • Operation from 3V to 30V
    • Transient Protection to 40V
  • Surface Mount Components
  • 28-Lead (4mm × 5mm) QFN and TSSOP Packages
LT3492
Triple Output LED Driver with 3000:1 PWM Dimming
High Dimming Ratio Triple Output Buck-Mode LED Power Supply 3000:1 PWM Dimming at 100Hz Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

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
Digital to Analog Converters (DACs) 1
LTC2657
PRODUCTION Octal I2C 16-/12-Bit Rail-to-Rail DACs with 10ppm/°C Max Reference
Hot Swap Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
Pulse-Width Modulation (PWM) & Pulse Generators 1
LTC6992
TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)
Temperature Sensors 1
LTC2991
RECOMMENDED FOR NEW DESIGNS Octal I2C Voltage, Current, and Temperature Monitor
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT3492
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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 1
DC1405A

LT3492EFE Demo Board | Boost/Buck-Boost Triple Output LED Driver, 8V ≤ VIN ≤ 40V, VLED = 54V @ 61mA (x3)

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Product Details

Demonstration circuit 1405 is a Triple Boost or Buck/Boost LED Driver featuring the LT3492. The LT3492 is a triple output DC/DC converter designed to operate as current sources for driving LEDs using . Each of the three regulators on the demo board is independently operated. The board can be configured with either boost (default) or buck-boost mode; buck mode is not supported. The current for each output is 61mA in either mode.


The IC's input voltage range is 8V to 30V with 40V transient protection; however the LEDs input power source can be as high as 40V.  The overvoltage protection (open LED detect) is set at 58V. For a typical application with a LED voltage of 3.6V, each boost circuit can drive around 15 LEDs. Applications with different input voltages and load combinations can be demonstrated on this circuit with some board modifications. 


 
DC1405A
LT3492EFE Demo Board | Boost/Buck-Boost Triple Output LED Driver, 8V ≤ VIN ≤ 40V, VLED = 54V @ 61mA (x3)
DC1405A - Schematic

Latest Discussions

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