6W USB Charger with Quasi Resonant/Flyback Controller Reference Design
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PMP9088 is a 6W USB Adapter reference design using the UCC28722 quasi-resonant discontinuous PSR flyback controller and ST13003 NPN power transistor, which illustrates the use of BJT power switches in AC/DC chargers and related industrial power supply applications. This reference design converts 100V to 240V RMS input voltage down to 5V DC, with a typical current limit of 1.35A for USB adapter applications.

  • 100V to 240V RMS Input, 5V 1.2A Output
  • USB Adaptor in Cube form factor, 20mm X 21mm X 20mm
  • Topology Isolated Discontinuous/Quasi Resonant Flyback
  • UCC28722 Constant Current, Constant Voltage Flyback
  • ST13003 NPN power transistor for Flyback power switch
  • External trickle charge circuit for start-up

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(Output Voltage 1)
Vin (Min) (V)100
Vin (Max) (V)240
Vout (Nom) (V)5
Iout (Max) (A)1.2
Output Power (W)6
Input TypeAC
TopologyFlyback- Non Sync

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

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Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
UCC28722 Download

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User guides (1)
Title Type Size (KB) Date
PDF 509 19 Nov 2013
Design files (4)
Title Type Size (KB) Date
ZIP 480 19 Nov 2013
PDF 102 19 Nov 2013
PDF 29 19 Nov 2013
PDF 198 19 Nov 2013

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