200V to 400V Input (Nominal), Triple-Output Bias Supply with Input Voltage Sensing Reference Design
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Key Document


This reference design is a compact and thermally efficient design intended to be used as a bias supply for half-bridge converters. A DCM Flyback with UCC3813-4 controller is used to generate two isolated 12V supplies for half-bridge converter primary driving circuitry. One 5V is generated at the secondary side for secondary rectifier driving circuitry and controller. The second winding at secondary side can be used to sense input voltage level while the Flyback converter is operating.

  • 200VDC to 400VDC input, two isolated 12V output at primary side and one 5V output at secondary side
  • Less than 30 degree C temperature rise on all parts
  • Input voltage sensing circuit included
  • 1" x 1.5" x 0.5" board dimension
  • Test report available

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Design Guide

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
(Output Voltage 3)
Vin (Min) (V)2002005.5
Vin (Max) (V)4004008
Vout (Nom) (V)1265
Iout (Max) (A).2.1.1
Output Power (W)
Input TypeDCDCDC
TopologyFlyback- DCMFlyback- DCMBuck- Synchronous

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
TPS62163  3V-17V 1A Step-Down Converters with DCS-Controlâ„¢  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
UCC3813-4  Economy low power BICMOS 1MHz current mode PWM with 12.5V/8.3V UVLO, 50% duty cycle, 0C to 70C  Offline & isolated DC/DC controllers & converters  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS62163 Download Download
UCC3813-4 Download Download
Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1171 30 May 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1535 30 May 2017
ZIP 518 30 May 2017
PDF 417 30 May 2017
PDF 101 30 May 2017
PDF 33 30 May 2017
PDF 117 30 May 2017

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