Low-cost Universal AC-DC Input Non-isolated Buck Conv using BJT for 12V/0.2A Output Reference Design
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

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


The PMP9707 reference design uses Buck converter to convert universal AC input voltage (85Vac to 265Vac) to a 12V/200mA DC output with UCC28722 controller. BJT is applied to the buck switch for cost optimization, and simplicity is achieved with bulit-in sample and hold regulation function in UCC28722.

  • Universal AC Input Wide Vin capability (85Vac to 265Vac)
  • Simple, Low cost solution with BJT employed as Buck switch
  • Small 14.6mm2 two layer PCB footprint with 24 BOM components (excluding test points)
  • Conducted EMI tested (confirms EN550022 and CISPR-22 Class B)

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


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

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

Download Test Data

Design Files

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

Download Design Files

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
UCC28722  Low-Cost CVCC Flyback controller With primary-side regulation for bipolar Power Device  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)
UCC28722 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 documentation

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

User guide (1)
Title Type Size (KB) Date
PDF 1022 10 Dec 2014
Design files (3)
Title Type Size (KB) Date
PDF 111 06 May 2015
PDF 105 06 May 2015
ZIP 188 10 Dec 2014

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