Universal AC input, 2.75-W non-isolated flyback reference design


Design files


This reference design is a non-isolated flyback topology that takes a universal AC input (90 VAC to 275 VAC) and outputs 5 V at 550mA. The design is an ultra-small form factor and uses a custom transformer.

  • Ultra-compact at 25-mm x 25-mm x 10-mm (height)
  • Universal input
  • EMI tested
Output voltage options PMP22056.1
Vin (Min) (V) 90
Vin (Max) (V) 275
Vout (Nom) (V) 5
Iout (Max) (A) .55
Output Power (W) 2.75
Isolated/Non-Isolated Non-Isolated
Input Type AC
Topology Flyback- DCM

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.

TIDT123.PDF (7500 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDM097.PDF (85 K)

Detailed schematic diagram for design layout and components

TIDM098.PDF (54 K)

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

TIDM099.PDF (50 K)

Detailed overview of design layout for component placement

TIDM101.ZIP (583 K)

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

TIDCFK6.ZIP (1572 K)

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

TIDM100.PDF (294 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Flyback controllers

UCC28880High voltage switcher for Non-isolated AC/DC Conversion

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report Universal AC Input, 2.75-W Non-Isolated Flyback Reference Design Jul. 30, 2019

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