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LTspice LT3952 Demo Circuit - Short-Circuit Robust Boost LED Driver (7-42V to 50V @ 333mA) Download 4.00KB LTspice LT3952 - LED Driver IC Download 3.15 KB
Features
  • 4000:1 True Color PWM™ Dimming
  • 4A, 60V Internal DMOS Switch
  • Wide Input Voltage Range: 3V to 42V
  • 0V to 60V Output Current Regulation with Monitor
  • PMOS Switch Driver for PWM and Output Disconnect
  • LED Short-Circuit Protection and SHORTLED Flag
  • Internal Spread Spectrum Frequency Modulation
  • Constant-Current and Constant-Voltage Regulation
  • Input Current Limit and Monitor
  • Adjustable Frequency: 200kHz to 3MHz, Synchronizable to an External Clock
  • 10:1 Analog Dimming
  • Programmable Open-LED Protection with OPENLED Flag
  • Programmable VIN Undervoltage and Overvoltage Lockout
  • Available in a 28-Lead TSSOP Package
Additional Details
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The LT3952 is a current mode step-up DC/DC converter with an internal, 60V, 80mΩ DMOS power switch. The LT3952 is specifically designed to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage source.

Programmable switching frequency with optional spread-spectrum modulation provides EMI reduction, while still allowing optimization of the external components for efficiency or component size. The LED current is programmable with an external sense resistor, and can be adjusted from zero to full scale with a voltage at the CTRL pin. The external PWM input provides LED ON/OFF control and 4000:1 dimming ratio, and an internal PWM generator delivers the efficiency of PWM dimming to standalone or I/O limited applications. The LT3952 is available in the thermally enhanced 28-lead TSSOP package.

Applications

  • Display Backlighting
  • Automotive and Avionic Lighting
  • Accurate Current-Limited Voltage Regulators
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Documentation View All Documentation
LTspice LT3952 Demo Circuit - Short-Circuit Robust Boost LED Driver (7-42V to 50V @ 333mA) Download 4.00KB LTspice LT3952 - LED Driver IC Download 3.15 KB
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LT3952

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R580 Reliability Data redirect icon

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UPDATED 07/11/2016
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Create Colorful and Bright LED Light with an LED Matrix Dimmer redirect icon

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UPDATED 07/18/2016
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UPDATED 09/29/2016
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DN556 - 3A, 1MHz Buck Mode LED Driver with Integrated Voltage Limiting redirect icon

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DC2013A - Demo Manual (Rev.B) redirect icon

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Documentation

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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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LT3952 Demo Circuit - Short-Circuit Robust Boost LED Driver (7-42V to 50V @ 333mA) Download

4.00K

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LT3952 - LED Driver IC Download

3.15 K

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