Universal Input to 12V@500mA PSR Isolated Flyback with Integrated 700V Switch Reference Design


Design files


A quasi-resonant primary-side regulated isolated Flyback is used to provide 12V @ 500mA from universal input voltage (90Vac to 265Vac). The converter does not employ any optocoupler and regulates the output voltage by sensing the auxiliary winding on primary side. A peak input voltage detector is used to sense input AC voltage, delivering 1/100 AC RMS equivalent voltage, with a +/-5% precision.

  • Simple isolated PSR Flyback converter with integrated 700V FET
  • Compact solution ("L" shaped PCB) supplies 6W with almost flat efficiency (70%...83%) from 50mA to 500mA load
  • Opto-less topology increases the reliability of the power supply
  • Good output voltage regulation versus load: +/-5% in the whole temperature range
Output voltage options PMP30032.1
Vin (Min) (V) 90
Vin (Max) (V) 265
Vout (Nom) (V) 12
Iout (Max) (A) .5
Output Power (W) 6
Isolated/Non-Isolated 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.

TIDUC11.PDF (1392 K)

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


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


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


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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Flyback controllers

UCC28911700V Flyback switcher with constant-voltage constant-current and primary-side regulation

Data sheet document-pdfAcrobat PDF open-in-new HTML
General-purpose op amps

TS321Single, 30-V, 800-kHz operational amplifier

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

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Test report PMP30032 Test Results Jun. 29, 2016

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​