US Line (120VAC +/- 15%) Input, 12V/450mA and 5V/50mA Dual Output Bias Supply Reference Design PMP20315 (ACTIVE)

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Key Document


The PMP20315 is a low cost bias supply reference design with 12V/450mA and 5V/50mA outputs from 120VAC input. This reference design uses BJT with UCC28722 primary-side regulation BJT controller and single layer PCB to reduce the overall BOM cost.

  • 120VAC nominal (102VAC to 138VAC) 50/60Hz input to 12V/450mA and 5V/50mA outputs
  • Less than 35oC temperature rise on all parts
  • Single layer PCB design
  • Flyback with bipolar junction transistor (BJT) switch
  • Test report available

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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)102102
Vin (Max) (V)138138
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
UCC28722  Low-Cost CVCC Flyback Controller With Primary-Side Regulation for Bipolar Power Device  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)
UCC28722 Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1864 30 Jan 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1227 30 Jan 2017
ZIP 486 30 Jan 2017
PDF 473 30 Jan 2017
PDF 134 30 Jan 2017
PDF 53 30 Jan 2017
PDF 93 30 Jan 2017

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