8.5W Dual Output (5V/12V) Universal Input AC/DC Isolated Flyback Reference Design with PSR
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical Documents

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document


The TIDA-00618 reference design is a Primary Side Regulation switcher which provides isolated dual outputs, 5V and 12V rails, with DC stacking of the secondaries to provide output voltage regulation that is equivalent to opto-coupler based solution.

Low system parts count and built in advanced protection features result in a cost-effective solution with an average efficiency of nearly 75% at 230V

  • Isolated 5V and 12V output at 500mA maximum
  • Conducted EMI compliant
  • 100ms typical start-up time
  • Primary side control eliminates need for optocoupler
  • Input under & Output over voltage protection
  • Primary over current protection
  • Controlled start up and restart after fault Protection

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Design Guide

Get results faster with test and simulation data that's been verified.

Download Design Guide

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)8585
Vin (Max) (V)265265
Vout (Nom) (V)512
Iout (Max) (A).5.5
Output Power (W)2.56
Input TypeACAC
TopologyFlyback- DCMFlyback- DCM

TI Devices (1)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28911  700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Regulation  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)
UCC28911 Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 813 28 Jul 2015
Design files (4)
Title Type Size (KB) Date
ZIP 253 28 Jul 2015
PDF 106 28 Jul 2015
PDF 30 28 Jul 2015
PDF 237 28 Jul 2015

Support & training

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective 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 visit our Support page.

Technical articles