310W PSU Using Transition Mode Bridgeless PFC and LLC-SRC - Reference Design


Design files


High efficiency, high power factor and reliable power supply are the main focus of the PMP9640 design for motor driver applications.  Low cost analog transition mode (TM) PFC controller UCC28051 has been used for bridgeless PFC as the first conversion stage of the PMP9640.  LLC series resonant converter (SRC) with UCC25600 is applied as the second stage of the PMP9640.  In addition, a high-side buck converter with UCC28710 is applied here as the bias supply.  In this design, bridgeless PFC efficiency can go up to 98.5%.

  • Universal 85VAC-264VAC input
  • 28V 310W output
  • Up to 98.5% PFC efficiency
  • TM bridgeless PFC output power goes up to 365W
  • AC-DC PSR buck for bias supply
Output voltage options PMP9640.1
Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 28
Iout (Max) (A) 11
Output Power (W) 308
Isolated/Non-Isolated Isolated
Input Type AC
Topology Buck- Non Sync^Half Bridge- LLC^PFC- Boost
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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.

TIDU538.PDF (1530 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

TIDMCU4.ZIP (1116 K)

Files used for 3D models or 2D drawings of IC components

TIDC630.ZIP (310 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

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

Data sheet: PDF | HTML
LLC controllers

UCC256008-pin high-performance resonant mode LLC controller

Data sheet: PDF | HTML
Power factor correction (PFC) controllers

UCC28051Transition mode PFC controller with 12.5V/9.7V UVLO and IEC61000-3-2 compliance, -40°C to 105

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Analog Design Journal Design a transition-mode, bridgeless PFC with a standard PFC controller Oct. 24, 2014
Test report PMP9640 Test Results Sep. 18, 2014

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