European Input Voltage Range to 24V@2.5A Primary Side Regulated Isolated Flyback Reference Design PMP11753 (ACTIVE)

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Key Document


A quasi-resonant primary-side regulated isolated Flyback is used to provide 24V industrial voltage at 1.9A average (2.5Apeak) on secondary side and 24V @ 300mA on primary side from an AC input voltage of 170Vac-264Vac. The converter does not employ any optocoupler and regulates both output voltages by sensing the auxiliary winding on primary side. Thanks to its own constant current capability, it is possible to parallel two or more power supplies.

  • Simple isolated PSR Flyback topology makes paralleling power supplies possible
  • Compact solution supplies 60W peak with almost flat efficiency from 2.5W to 55W (80%...89%)
  • Opto-less topology increases the reliability of the power supply
  • Good output voltage regulation versus load: +/-2% at ambient temperature, +/-5% in the whole range

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)170170
Vin (Max) (V)264264
Vout (Nom) (V)2424
Iout (Max) (A)2.5.3
Output Power (W)607.2
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
UCC28632  High Power Flyback Controller with Primary-Side Regulation and Peak Power Mode  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)
UCC28632 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 957 05 May 2016
Design files (6)
Title Type Size (KB) Date
ZIP 40 05 May 2016
ZIP 811 05 May 2016
PDF 559 05 May 2016
PDF 954 05 May 2016
PDF 137 05 May 2016
PDF 309 05 May 2016

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