85-VAC - 480-VAC input, multiple output flyback reference design PMP30281 (ACTIVE)

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Key Document

Description

This offline flyback reference design uses the UCC28722 controller to generate 2 isolated outputs (5 V at 400 mA, 24 V at 300 mA) from an AC input (85 VAC - 480 VAC). The UCC28722 output drive interfaces to a bipolar transistor power switch, enabling a more efficient design than a typical design. The valley-switching technique reduces switching losses and keeps the efficiency high. The controller provides constant-voltage and constant-current regulation without the use of an optical-coupler.

Features
  • 180-VAC - 264-VAC input to 3 isolated outputs
  • Primary-side regulation eleminates the need for an optical-coupler
  • Valley-switching operation keeps the efficiency high
  • Dynamic BJT drive enables lower cost converter design

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Schematic/Block Diagram

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Parametrics
 PMP30281.1
(Output Voltage 1)
PMP30281.2
(Output Voltage 2)
Vin (Min) (V)8585
Vin (Max) (V)480480
Vout (Nom) (V)524
Iout (Max) (A).4.3
Output Power (W)27.2
Isolated/Non-IsolatedIsolatedIsolated
Input TypeACAC
TopologyFlyback- Quasi ResonantFlyback- Quasi Resonant

TI Devices (1)

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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

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 8501 12 Dec 2018
Design files (6)
Title Type Size (KB) Date
ZIP 145 12 Dec 2018
ZIP 567 12 Dec 2018
PDF 260 12 Dec 2018
PDF 210 12 Dec 2018
PDF 31 12 Dec 2018
PDF 142 12 Dec 2018

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