Flyback Reference Design with High Line AC Input and 5V, 12V Dual-Output PMP20001 (ACTIVE)

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Key Document


The PMP11405 reference design uses the UCC28740 constant current (CC), constant voltage (CV) flyback controller for a 5V/1A, 12V/0.9A bias supply with high line AC input (185VAC to 260VAC input). With safety isolated, Over 80% efficiency is achieved at full load and less than 400mW power consumption is observed during no load condition.

  • High line AC input to 5V/1A and 12V/0.9A dual-output
  • 1.45" x 4.45" board dimension
  • CC & CV is enabled with UCC28740 flyback controller
  • Less than 400mW no load power consumption
  • Cross regulation tested

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)185185
Vin (Max) (V)260260
Vout (Nom) (V)512
Iout (Max) (A)1.9
Output Power (W)510.8
Input TypeACAC
TopologyFlyback- Non SyncFlyback- Non Sync

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM431  2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator  Voltage references  Sample & Buy Not Available
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)
LM431 Download Download
Download Download
Download Download
UCC28740 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1095 06 Dec 2016
Design files (6)
Title Type Size (KB) Date
ZIP 1136 06 Dec 2016
ZIP 712 06 Dec 2016
PDF 489 06 Dec 2016
PDF 75 06 Dec 2016
PDF 148 06 Dec 2016
PDF 124 06 Dec 2016

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