7V/350mW Non-Isolated Flyback Reference Design
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Key Document


PMP20457 is a high line 190-253VAC input to 7V/350mW power supply in a small form-factor, cost-effective design. It uses the UCC28881 which features an integrated 700V switch. The PMP20457 is a 2-layer, 1-oz copper weight per layer, 1.25 inch x 4 inch board.

  • 190-253VAC input to 7V/350mW output
  • Integrated switch
  • Current limited output
  • Complete test report and design support collateral, including thermal performance
  • 1 oz, 2-layer board measuring 1.25 inches x 4 inches

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Schematic/Block Diagram

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Design Guide

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Design Files

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(Output Voltage 1)
Vin (Min) (V)190
Vin (Max) (V)253
Vout (Nom) (V)7
Iout (Max) (A).05
Output Power (W).35
Input TypeAC
TopologyFlyback- Integrated Switch

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LP2980-ADJ  Micropower 50 mA Ultra Low-Dropout Adjustable Voltage Regulator in SOT-23  Power management  Sample & Buy View Design Kits & Evaluation Modules
UCC28881  700-V Lowest Quiescent Current Off-Line Switcher  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)
LP2980-ADJ Download Download
UCC28881 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 537 30 May 2017
Design files (6)
Title Type Size (KB) Date
ZIP 417 30 May 2017
ZIP 4190 30 May 2017
PDF 465 30 May 2017
PDF 72 30 May 2017
PDF 62 30 May 2017
PDF 84 30 May 2017

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