European Input Voltage Range to 24V@2.5A Primary Side Regulated Isolated Flyback Reference Design


Design files


A quasi-resonant primary-side regulated isolated Flyback is used to provide 24V industrial voltage at 1.9A average (2.5Apeak) on secondary side and 24V @ 300mA on primary side from an AC input voltage of 170Vac-264Vac. The converter does not employ any optocoupler and regulates both output voltages by sensing the auxiliary winding on primary side. Thanks to its own constant current capability, it is possible to parallel two or more power supplies.

  • Simple isolated PSR Flyback topology makes paralleling power supplies possible
  • Compact solution supplies 60W peak with almost flat efficiency from 2.5W to 55W (80%...89%)
  • Opto-less topology increases the reliability of the power supply
  • Good output voltage regulation versus load: +/-2% at ambient temperature, +/-5% in the whole range
Output voltage options PMP11753.1 PMP11753.2
Vin (Min) (V) 170 170
Vin (Max) (V) 264 264
Vout (Nom) (V) 24 24
Iout (Max) (A) 2.5 .3
Output Power (W) 60 7.2
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

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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


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TIDCC55.ZIP (40 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)

UCC28632High power Flyback controller with PSR and peak power mode

Data sheet: PDF | HTML

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Type Title Date
* Test report PMP11753 Test Results May 05, 2016

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