33W Offline QR Flyback Converter with Multiple Outputs Reference Design
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This design uses the UCC28610 quasi-resonant flyback controller to generate 3 isolated outputs from an universal input (90VAC - 290VAC). It was built on a low cost single layer PCB. The regulated output provides 12V@1.89A and the maximum output power is 33W.

  • Universal input voltage
  • Valley switching
  • Multiple outputs
  • Single Layer PCB

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Schematic/Block Diagram

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Test Data

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
(Output Voltage 3)
Vin (Min) (V)909090
Vin (Max) (V)290290290
Vout (Nom) (V)181812
Iout (Max) (A).39.21.89
Output Power (W)7.023.622.68
Input TypeACACAC
TopologyFlyback- Quasi ResonantFlyback- Quasi ResonantFlyback- Quasi Resonant

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMV431A  1%, low-voltage (1.24-V) adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available
UCC28610  12-65W green-mode Flyback power supply controller  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)
LMV431A Download Download
Download Download
UCC28610 Download Download
Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 810 14 Apr 2015
Design files (3)
Title Type Size (KB) Date
ZIP 340 14 Apr 2015
PDF 100 14 Apr 2015
PDF 81 14 Apr 2015

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