Efficient, Step-down, High-power LED Driver with Strobe and Synchronization for Fire Alarms
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.


This TI Design demonstrates an efficient, step-down, high-power LED driver with strobe & synchronization for fire alarms. A 3-A LED is driven from a common, quasi-regulated 12-V input bus at over 85% efficiency. The circuit supports a clock input for the strobe function, which allows synchronization of multiple LED drivers to a common clock source.

As seen at APEC

  • LED current of up to 3A
  • 4.5V to 17V input voltage range
  • Synchronizable to an external clock signal
  • Supports PWM and/or analog dimming, including strobe
  • Over 85% efficiency
  • This circuit is tested hardware with a test report and all design files

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

(Output Voltage 1)
Vin (Min) (V)4.5
Vin (Max) (V)17
Vout (Nom) (V)3.5
Iout (Max) (A)3
Output Power (W)10.5
Input TypeDC
TopologyBuck- Synchronous

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMC555  World’s smallest 555 timer with low power, high accuracy and a Fmax of 3MHz  Clocks & timing  Sample & Buy View Design Kits & Evaluation Modules
TPS62130  3-17V 3A Step-Down Converter with DCS-Control in 3x3 QFN Package  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LMC555 Download Download
TPS62130 Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Application note (1)
Title Type Size (KB) Date
PDF 935 20 Feb 2015
Design files (3)
Title Type Size (KB) Date
ZIP 213 20 Feb 2015
PDF 25 20 Feb 2015
PDF 135 20 Feb 2015

Support & training

TI E2E™ forums with technical support from TI engineers

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles