AC Input, 5V/3.3V2A Cascaded Power Supply Reference Design

(ACTIVE) PMP4472

Description & Features

Technical Documents

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Key Document

Description

The PMP4472 is a power reference design with a high AC input, 5Vout, followed by a DC isolated
output of 3.3V at 2A. It implements a high efficiency controller UCC28740 to provide 5V bus voltage and a step-Down Converter TPS54228.The design achieves good line and load regulation as well as  good dynamic response and low output ripple voltage.

Features
  • Isolated Flyback and Buck converter
  • 2 outputs include 5V Bus voltage
  • Good line and load regulation
  • Good dynamic response
  • Low output ripple voltage

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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Parametrics
 PMP4472.1
(Output Voltage 1)
PMP4472.2
(Output Voltage 2)
Vin (Min) (V)1985
Vin (Max) (V)2425
Vout (Nom) (V)53.3
Iout (Max) (A)1.52
Output Power (W)7.56.6
Isolated/Non-IsolatedIsolatedNon-Isolated
Input TypeACDC
TopologyFlyback- Quasi ResonantBuck- Synchronous

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TL431A  1% Accuracy Adjustable Precision Shunt Regulator  Voltage references  Sample & Buy Not Available
TPS54228  4.5V to 18V Input, 2-A Synchronous Step-Down Converter with Eco-mode™   Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
UCC28740  Constant-Voltage, Constant-Current Flyback Controller Using Opto-Coupler Feedback  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)
TL431A Download Download
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Download -
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Download Download
Download Download
Download Download
Download -
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TPS54228 Download Download
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UCC28740 Download

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


Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 348 22 Sep 2015 18
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 198 22 Sep 2015 4
PDF 168 22 Sep 2015 8
PDF 358 22 Sep 2015 13

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