Efficient, Step-down, High-power LED Driver with Strobe and Synchronization for Fire Alarms


Design files


This reference design demonstrates an efficient, step-down, high-power LED driver with strobe and 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.

  • LED current of up to 3 A
  • 4.5-V to 17-V input voltage range
  • Synchronizable to an external clock signal
  • Supports PWM and/or analog dimming, including strobe
  • Over 85% efficiency
  • Tested hardware with a test report and all design files
Output voltage options PMP9762.1
Vin (Min) (V) 4.5
Vin (Max) (V) 17
Vout (Nom) (V) 3.5
Iout (Max) (A) 3
Output Power (W) 10.5
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDRD06.PDF (135 K)

Detailed schematic diagram for design layout and components

TIDRD07.PDF (25 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC919.ZIP (213 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
Application note PMP9762 Test Results Feb. 20, 2015

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