Piezo Speaker Strobe Notification Reference Design


Design files


TIDA-00376 uses our industrial piezo driver, flash LED driver and the ultra-low-power FRAM microcontroller (MCU) to demonstrate the implementation of both audible and visual notification subsystems primarily intended for fire alert end-equipment systems. This reference design demonstrates multiple alert-tone frequency outputs through a single piezo transducer, as well as a low-input current and high light-output LED strobe.

  • Meets NFPA 72 code requirements for audible and visual notification devices
  • 86.5 dBA @ 3 m (520-Hz square wave)
  • 80.5 dBA @ 3 m (2.84-kHz sine wave)
  • 77.5 dBA @ 3 m (pre-recorded speech)
  • 300 candela @ 3 m (flash mode)
  • 1.44-W power consumption (audible and visual notification)
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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.


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDREY4.ZIP (1264 K)

Files used for 3D models or 2D drawings of IC components


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

TIDREY3.PDF (2382 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Piezo drivers

DRV2700Industrial piezo driver with integrated 105-V boost converter in QFN package

Data sheet: PDF | HTML
Buck converters (integrated switch)

LMR14030SIMPLE SWITCHER® 40-V, 3.5-A, 2.2-MHz step-down converter with 40-uA IQ

Data sheet: PDF | HTML
ESD protection diodes

TPD1E10B0612-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet: PDF | HTML
ESD protection diodes

TPD6F0036 channel 5.5-V, ±12kV ESD protection & EMI Filter with 200-MHz -3-dB

Data sheet: PDF | HTML
General-purpose op amps

LMV344Quad, 5.5-V, 1-MHz, high output current (75-mA) operational amplifier

Data sheet: PDF | HTML
Illumination LED drivers

LM3550A flash LED driver with Automatic Vf and ESR Detection for Mobile Camera Systems

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR596916 MHz MCU with 64KB FRAM, 2KB SRAM, AES, 12-bit ADC, comparator, DMA, UART/SPI/I2C, timer

Data sheet: PDF | HTML
N-channel MOSFETs

CSD15571Q220-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 19.2 mOhm

Data sheet: PDF

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Technical documentation

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Type Title Date
* User guide Piezo Speaker Strobe Notification Reference Design Guide (Rev. A) Sep. 01, 2015

Related design resources

Reference designs

PMP9762 Efficient, Step-down, High-power LED Driver with Strobe and Synchronization for Fire Alarms

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