Overview

Features and Benefits

  • 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
  • Up to 95% Efficiency
  • Proprietary Peak-Buck Peak-Boost Current Mode
  • Wide VIN Range: 4V to 60V
  • Wide VOUT Range: 0V to 100V
  • ±4% LED Current Accuracy
  • 2000:1 External and 128:1 Internal PWM Dimming
  • 10V High Side PMOS PWM Switch Driver
  • No Top MOSFET Refresh Noise in Buck or Boost
  • Adjustable and Synchronizable: 350kHz to 2MHz
  • Flicker-Free Spread Spectrum for Low EMI
  • Open and Short LED Protection with Fault Reporting
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LT8393 is a synchronous 4-switch buck-boost LED controller that regulates LED current from input voltage above, below, or equal to the output voltage. The proprietary peak-buck peak-boost current mode control scheme allows adjustable and synchronizable 350kHz to 2MHz fixed frequency operation, or internal 25% triangle spread spectrum operation for low EMI. With 4V to 60V input, 0V to 100V output, and seamless low noise transitions between operation regions, the LT8393 is ideal for LED driver and battery charger applications in automotive, industrial, and battery-powered systems.

The LT8393 provides both internal (up to 128:1) and external (up to 2000:1) LED current PWM dimming with 10V of high side PMOS gate drive. The CTRL pin provides flexible 20:1 analog dimming with ±3% LED current accuracy at 100mV full scale. Fault protection is provided to detect an open or short LED condition, during which the LT8393 retries, latches off, or keeps running.

APPLICATIONS

  • Automotive Head Lamps/Running Lamps
  • High Voltage LED Lighting

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations

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.

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.

LTspice

Models for the following parts are available in LTspice:

LT8393

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

Sample & Buy


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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


Price Table Help

 

Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.