Ultra-wide Input Range, Dual Output, Offline AC/DC Bias Supply with PSR Control and BJT Switch


Design files


This design uses low cost primary side regulation (PSR) IC UCC28722 with a bipolar transistor for ultra-wide input range applications (85VAC to 528VAC). Two outputs with separated grounds, 5V/0.3A and 16.5V/0.1A are generated.

  • Ultra-wide AC input range: 85VAC-528VAC
  • Dual Output with separated grounds, 5V/0.3A and 16.5V/0.1A
  • 3W Maximum output power rating at efficiency of 63.6% at 85Vac, 61.7% at 528Vac
  • Low cost, 800V bipolar transistor as primary switch for Flyback converter
  • Total 18% output cross-regulation on 5V rail, from no load to full-load
  • Total 13% output cross-regulation on 15V rail, from no load to full-load
Output voltage options PMP10397.1 PMP10397.2
Vin (Min) (V) 85 85
Vin (Max) (V) 528 528
Vout (Nom) (V) 15 5
Iout (Max) (A) .1 .3
Output Power (W) 1.5 1.5
Isolated/Non-Isolated Isolated Isolated
Input Type AC AC
Topology Flyback- Quasi Resonant Flyback- Quasi Resonant
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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.

TIDU559.PDF (888 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


Detailed overview of design layout for component placement

TIDC645.ZIP (184 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.

AC/DC & DC/DC controllers (external FET)

UCC28722Low-Cost CVCC Flyback controller With primary-side regulation for bipolar Power Device

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Technical article Solving the biggest challenges when designing smart meter power supplies PDF | HTML Sep. 06, 2016
Test report PMP10397 Test Results Sep. 25, 2014

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