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


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

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Design Files

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(Output Voltage 1)
Vin (Min) (V)90
Vin (Max) (V)275
Vout (Nom) (V)5
Iout (Max) (A).5
Output Power (W)2.5
Input TypeAC
TopologyFlyback- Non Sync

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28880  High Voltage Switcher for Non-isolated AC/DC Conversion  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
UCC28880 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 901 23 Sep 2015
Design files (4)
Title Type Size (KB) Date
ZIP 24 23 Sep 2015
PDF 160 23 Sep 2015
PDF 104 23 Sep 2015
PDF 196 23 Sep 2015

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