85-265VACin, 12V/1.5A PSR Flyback Reference Design PMP10351 (ACTIVE)

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This reference design uses the UCC28713 primary-side regulated (PSR) flyback controller to generate a 12V/1.5A output from a univeral AC input. The valley switching of the UCC28713 allows this low-cost design to achieve an average efficiency over 87%; no load losses are less than 50mW.  The PSR function eliminates the need for an optocoupler and TL431, greatly simplifying the circuit and reducing cost.

  • Primary side regulation eliminates the need for an optocoupler and TL431.
  • Low cost
  • High efficiency, over 87% average efficiency
  • Low standby power consumption, under 50mW

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)265
Vout (Nom) (V)12
Iout (Max) (A)1.5
Output Power (W)18
Input TypeAC
TopologyFlyback- DCM
Flyback- Quasi Resonant

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28713  Constant-Voltage, Constant-Current Controller with Primary-Side Regulation  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)
UCC28713 Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 5406 10 Oct 2014
Design files (5)
Title Type Size (KB) Date
ZIP 171 10 Oct 2014
PDF 169 10 Oct 2014
PDF 52 10 Oct 2014
PDF 82 10 Oct 2014
PDF 127 10 Oct 2014

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