108-VDC - 411-VDC Input non-isolated flyback reference design
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Key Document


This offline flyback reference design uses the UCC28910 controller to generate 2 non-isolated outputs (6.5 V at 600 mA, 15 V at 67 mA) from a DC input (108 VDC - 411 VDC). The UCC28910 incorporate a 700-V power FET and a high-voltage current source for startup to achieve low stand-by power. 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.

  • 108 VDC - 411 VDC input to two non-isolated outputs
  • Primary-side regulation eliminates the need for an optical coupler
  • Valley-switching operation keeps the efficiency high
  • Easy to use because of integrated 700-V power FET

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)108108
Vin (Max) (V)411411
Vout (Nom) (V)6.515
Iout (Max) (A).6.067
Output Power (W)3.91.005
Input TypeDCDC
TopologyFlyback- Quasi ResonantFlyback- Quasi Resonant

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28910  700V Flyback switcher with constant-voltage constant-current and primary-side control  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)
UCC28910 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 6994 21 Dec 2018
Design files (6)
Title Type Size (KB) Date
ZIP 138 21 Dec 2018
ZIP 492 21 Dec 2018
PDF 240 21 Dec 2018
PDF 94 21 Dec 2018
PDF 27 21 Dec 2018
PDF 100 21 Dec 2018

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