Universal AC Input, 5V/500mA DC output, Non-isolated Flyback Converter Reference Design


Design files


This design demonstrates the use of UCC28880 high-voltage switcher to design an Offline Non-Isolated Flyback converter that can supply greater than 100mA output current. Using direct resistor-divider feedback, this design delivers a well-regulated 5V/500mA output with minimal component count.

  • UCC28880 based Non-Isolated Flyback converter
  • Design delivers >100mA output current
  • 5V output, regulated by direct resistor divider feedback network
  • >77% efficiency at 2.5W/5V/500mA
  • Tightly regulated 5V output (<1.5%, at 25C) using direct resistor divider feedback
  • Short-circuit withstand capability of 3 seconds
  • This design is tested and includes test results and CAD files
Output voltage options PMP10175.1
Vin (Min) (V) 90
Vin (Max) (V) 275
Vout (Nom) (V) 5
Iout (Max) (A) .5
Output Power (W) 2.5
Isolated/Non-Isolated Non-Isolated
Input Type AC
Topology Flyback- Non Sync
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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.


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

TIDRH76.PDF (196 K)

Detailed schematic diagram for design layout and components

TIDRH77.PDF (104 K)

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


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

TIDRH78.PDF (160 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: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP10175 Test Results Sep. 23, 2015

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