LT3492
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LT3492

Triple Output LED Driver with 3000:1 PWM Dimming

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Info: : PRODUCTION tooltip
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Part Details
Part Models 8
1ku List Price Starting From $4.43
Features
  • 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
Additional Details
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The LT3492 is a triple output DC/DC converter designed to operate as a constant-current source and is ideal for driving LEDs. The LT3492 works in buck, boost or buck-boost mode. The LT3492 uses a fixed frequency, current mode architecture resulting in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 330kHz and 2.1MHz to optimize efficiency and external component size.

The external PWM input provides 3000:1 LED dimming on each channel. Each of the three channels has a built-in gate driver to drive an external LED-disconnect P-channel MOSFET, allowing high dimming range. The output current range of each channel of the LT3492 is programmed with an external sense resistor.

The CTRL pin is used to adjust the LED current either for analog dimming or over-temperature protection.

Applications

  • RGB Lighting
  • Billboards and Large Displays
  • Automotive and Avionic Lighting
  • Constant-Current Sources
Part Models 8
1ku List Price Starting From $4.43

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3492EFE#PBF

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LT3492EFE#TRPBF

PRODUCTION

LT3492IFE#PBF

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LT3492IFE#TRPBF

PRODUCTION

Feb 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

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LT3492EUFD#TRPBF

PRODUCTION

LT3492IUFD#PBF

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LT3492IUFD#TRPBF

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Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3492EFE#PBF

PRODUCTION

LT3492EFE#TRPBF

PRODUCTION

LT3492IFE#PBF

PRODUCTION

LT3492IFE#TRPBF

PRODUCTION

Feb 20, 2022

- 21_0269

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LT3492EUFD#PBF

PRODUCTION

LT3492EUFD#TRPBF

PRODUCTION

LT3492IUFD#PBF

PRODUCTION

LT3492IUFD#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1405A

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

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DC1405A

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

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

Product Detail

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. 


 


Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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