Reference Design for Line AC Voltage Generation From Low-Voltage DC Source for Sensor Excitation


Design files


This reference design demonstrates a method for designers to achieve high-voltage signals that can be used for flame detection using discrete components. The reference design is built with low BOM-cost and small solution size in mind. By using push-pull converter topology, it is possible to achieve a wide input range and low start-up time.

  • Universal input range of 10 to 36V
  • 120V, 60Hz output with 4% THD
  • 56ms startup time at 10V
  • 5% output accuracy
  • Output power up to 1W
  • Low footprint and BOM cost
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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.

TIDUD74.PDF (2238 K)

Reference design overview and verified performance test data

TIDRS64.PDF (465 K)

Detailed schematic diagram for design layout and components

TIDRS65.PDF (81 K)

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

TIDRS66.PDF (182 K)

Detailed overview of design layout for component placement

TIDRS68.ZIP (770 K)

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


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

TIDRS67.PDF (755 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

General-purpose op amps

OPA348Single, 5.5-V, 1-MHz, low quiescent current (45-μA), RRIO operational amplifier

Data sheet: PDF
N-channel MOSFETs

CSD19538Q3A100-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 61 mOhm

Data sheet: PDF | HTML
PWM controllers

TL49440V, 0.2A 300KHz PWM controller

Data sheet: PDF | HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Ref Design for Line AC Volt Generation From LV DC Source for Sensor Excitation Aug. 09, 2017

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