Universal AC 40W Set Top Box Power Supply (1.2V @ 3A)
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This reference evaluation module is an example of complete power-trees inside a set-top-box.
It performs an AC-DC conversion, then, DC-DC conversions for 1.2V/1.8V/2.5V/3.3V/5V rails.

  • Provides ready to copy complete power solution for a Set Top Box application
  • AC/DC provides isolated 12V for all down stream DC/DC conversion
  • AC/DC converter achieves over 85% efficiency at full load
  • All DC/DC rails provide individual enable and power-good functionalities
  • Very compact and cost effective 2-layer PCB design
  • This design is tested and ready to be used in any Set Top Box design

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


Schematic/Block Diagram

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Test Data

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
(Output Voltage 3)
(Output Voltage 4)
(Output Voltage 5)
(Output Voltage 6)
Vin (Min) (V)851010101010
Vin (Max) (V)2651414141414
Vout (Nom) (V)1253.
Iout (Max) (A)3.41.53333
Output Power (W)
TopologyFlyback- Quasi Resonant
Flyback- DCM
Buck- SynchronousBuck- SynchronousBuck- SynchronousBuck- SynchronousBuck- Synchronous

TI Devices (2)

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
TPS54325  4.5V to 18V Input, 3A Synchronous Step-Down Converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
UCC28610  12-65W green-mode Flyback power supply controller  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)
TPS54325 Download Download
UCC28610 Download Download
Download Download

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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 2976 16 Sep 2013
Design files (3)
Title Type Size (KB) Date
ZIP 151 18 Sep 2013
PDF 115 16 Sep 2013
PDF 127 16 Sep 2013

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