5V/2.5A AC/DC Flyback PSU for USB Adaptor Applications Reference Design


Design files


The PMP8965 is a 12.5W USB adapter reference design using the UCC28740 quasi-resonant/discontinues flyback controller, with synchronous rectification to improve efficiency using the UCC24610 Green Rectifier Controller.

  • Converter 100V to 240V RMS down to a 5V 12.5W
  • Single Sided PCB
  • Less than 75 mW no load input power
  • Meets EU Tier 2 10%, and 4 point average efficiency requirements
  • Meets DOE 4 point average efficiency requirements
Output voltage options PMP8965.1
Vin (Min) (V) 100
Vin (Max) (V) 240
Vout (Nom) (V) 5
Iout (Max) (A) 2.5
Output Power (W) 12.5
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- Non Sync
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU718.PDF (993 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC842.ZIP (3072 K)

Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Flyback controllers

UCC28740Constant-Voltage, Constant-Current (CVCC) Flyback controller with Secondary Side Regulation (SSR)

Data sheet: PDF | HTML
N-channel MOSFETs

CSD18534Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm

Data sheet: PDF | HTML
SR & load share controllers

UCC24610Secondary side synchronous rectifier controller

Data sheet: PDF | HTML
Shunt voltage references

TLV4311.5% accuracy, low-voltage, adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP8965 Test Results Jan. 05, 2015

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