85VAC to 264VAC Input, 12V/450mA and 5V/50mA Dual Output Bias Supply Reference Design
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Key Document


The PMP20339 is a low cost bias supply reference design with 12V/450mA and 5V/50mA outputs from 120VAC input. A dual-output flyback converter with UCC28700 primary-side regulation controller is used to generate 12V and 5V outputs. Single layer PCB is applied to reduce the overall BOM cost.

  • 85VAC to 264VAC, 50/60Hz input to 12V/450mA and 5V/50mA outputs
  • Less than 35°C temperature rise on all parts
  • Single layer PCB design
  • Dual output flyback with primary-side regulation (PSR)
  • Test report available

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)8585
Vin (Max) (V)264264
Vout (Nom) (V)125
Iout (Max) (A).45.05
Output Power (W)5.4.25
Input TypeACAC
TopologyFlyback- DCMFlyback- DCM

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28700  Constant-voltage, constant-current PWM with PSR & Programmable cable compensation  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)
UCC28700 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 2221 16 May 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1563 16 May 2017
ZIP 467 16 May 2017
PDF 453 16 May 2017
PDF 89 16 May 2017
PDF 31 16 May 2017
PDF 106 16 May 2017

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