7V/350mW Non-Isolated Flyback Reference Design


Design files


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
Output voltage options PMP20457.1
Vin (Min) (V) 190
Vin (Max) (V) 253
Vout (Nom) (V) 7
Iout (Max) (A) .05
Output Power (W) .35
Isolated/Non-Isolated Non-Isolated
Input Type AC
Topology Flyback- Integrated Switch

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.

TIDUD82.PDF (605 K)

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

TIDRR21.PDF (84 K)

Detailed schematic diagram for design layout and components

TIDRR22.PDF (62 K)

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

TIDRR23.PDF (72 K)

Detailed overview of design layout for component placement

TIDRR25.ZIP (4190 K)

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


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

TIDRR24.PDF (465 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Flyback controllers

UCC28881700-V Lowest Quiescent current off-line switcher

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

LP2980-ADJ50-mA, 16-V, adjustable low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF

Technical documentation

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Type Title Date
* Test report PMP20457 Test Results May 30, 2017

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