Universal Line Power Supply for PLC using PSR Flyback and Compact DC/DC Stages Reference Design


Design files


The PMP9185 reference design uses the UCC28710 primary-side regulated flyback controller to generate a 15V output from a univeral AC input with maximum 20W output power followied by DC/DC and LDO stages using TPS54229 and TPS650250, and 5V, 3.3V, 1.8V and 1.2V are provided. A switch on the PCB provides the freedom of supplying DC/DC and LDO from AC input or DC input.

  • PSR Flyback followed by DC/DC buck stages
  • Provides 15V, 5V, 3.3V, 1.8V and 1.2V outputs
  • Over 84% efficiency at full load
  • Over 79% efficiency at 10% load
  • AC or DC input options for the 5V, 3.3V, 1.8V and 1.2V outputs
Output voltage options PMP9185.1 PMP9185.2 PMP9185.3 PMP9185.4 PMP9185.5
Vin (Min) (V) 85 85 85 85 85
Vin (Max) (V) 256 256 256 256 256
Vout (Nom) (V) 5 3.3 1.8 1.2 15
Iout (Max) (A) 1.5 .2 .05 .8 1.2
Output Power (W) 7.5 .66 .09 .96 18
Isolated/Non-Isolated Isolated Isolated Isolated Isolated Isolated
Input Type AC AC AC AC AC
Topology Buck- Synchronous^Flyback- DCM^Linear Regulator Buck- Synchronous^Flyback- DCM^Linear Regulator Buck- Synchronous^Flyback- DCM^Linear Regulator Buck- Synchronous^Flyback- DCM^Linear Regulator Buck- Synchronous^Flyback- DCM^Linear Regulator
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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.

TIDU602.PDF (1757 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

TIDC704.ZIP (257 K)

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


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS542294.5V to 18V Input, 2-A Synchronous Step-Down Converter

Data sheet: PDF
Flyback controllers

UCC28710Constant-voltage, constant-current PWM with PSR, valley switching & Programmable cable compensation

Data sheet: PDF | HTML
Multi-channel ICs (PMICs)

TPS650250Configurable integrated power management (PMIC) with 3 DC/DC converters and 3 LDOs

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP9185 Test Results Oct. 16, 2014

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