300-W PFC plus Resonant LLC Half-Bridge controller off-line AC/DC PSU Module


Design files


This is a high efficiency 300-W AC/DC reference design.  The design can be biased from external supply or configured for Self-Bias Auxillary mode for operation directly off the AC mains.  The PFC is fully internally compensated, reducing design complexity and pcb design.  Protections include 3-level OCP, line brown-out, PFC Bulk OVP plus UVP and OTP.

  • 88.9% @115V, 90.6% @230V average efficiency
  • 83.68% @115V, 85.07% @230V 10% load efficiency 
  • High Power factor 99.5%, 6% typical THD @230Vac 50Hz
  • Less than 200mW No-Load-Power @115Vac acheivable in Auxulliary Self-BIAS mode
  • 397ms turn-on time
  • Line Brownout Protection
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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.


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC958.ZIP (327 K)

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


Includes TI products in the design and potential alternatives.

Half-bridge drivers

UCC277144-A, 600-V half bridge gate driver

Data sheet: PDF | HTML
Low-side drivers

UCC275114-A/8-A single-channel gate driver with 5-V UVLO, split outputs, and 13-ns Prop delay

Data sheet: PDF | HTML
Low-side drivers

UCC27511A4-A/8-A single-channel gate driver with 5-V UVLO, split outputs, 5-V IN handling

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

UCC29950High Efficiency CCM PFC/LLC Combination controller

Data sheet: PDF | HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
EVM User's guide Using the UCC29950EVM-631 300-W PFC/LLC Off-Line PSU Module (Rev. A) Mar. 11, 2015

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