AC Input, Dual Output Power Supply Reference Design


Design files


The PMP4405 reference design uses the UCC28740  Flyback controller with valley-switching controller to generate dual DC output 5V/2A and 26V/0.3A from a universal AC input. The design is suited for auxiliary power for industrial applications and appliances. The design is fully tested and compliant with EMI regulations

  • Two isolated rails delivering 18W power
  • Valley switching for high efficiency
  • Output OVP,OCP and SCP protoction
  • Single layer board for low cost
  • SSR control with good cross-regulation
  • EMI compliance
Output voltage options PMP4405.1 PMP4405.2
Vin (Min) (V) 85 85
Vin (Max) (V) 265 265
Vout (Nom) (V) 5 26
Iout (Max) (A) 2 .3
Output Power (W) 10 7.8
Isolated/Non-Isolated Isolated Isolated
Input Type AC AC
Topology Flyback- Quasi Resonant Flyback- Quasi Resonant

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.


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


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


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 document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report PMP4405 Test Results Aug. 26, 2015

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