400-W AC/DC reference design for avionics


Design files


This is a compact, 30-V DC, 400-W reference design for avionics applications that works with mains frequency between 400 Hz and 800 Hz. A two-phase interleaved transition mode (TM) power factor correction (PFC) based on UCC28064A is used to correct power factor and minimizes harmonic content of input current. The DC/DC is implemented using the HB-LLC stage with UCC256404. Efficiency is further improved by using synchronous rectification on the secondary side.

  • Overall efficiency of > 92% at full load with 92.8% peak efficiency
  • High power factor > 0.99, meets PFC regulations and current THD for DO-160 avionics requirements
  • ZCS avoidance feature and OVP sensing feature in LLC controller improve robustness and protect systems from overcurrent, short circuit and overvoltage to ensure safety
  • Board dimensions of 218.44 mm x 102.26 mm, height = 31.75 mm
Output voltage options PMP31179.1 PMP31179.2
Vin (Min) (V) 96 200
Vin (Max) (V) 134 260
Vout (Nom) (V) 240 30
Iout (Max) (A) 1.79 13.3
Output Power (W) 429.6 399
Isolated/Non-Isolated Non-Isolated Isolated
Input Type AC DC
Topology PFC- Multiphase Half Bridge- LLC
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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.

TIDT292.PDF (1565 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

TIDMAL0.ZIP (3971 K)

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

TIDCG80.ZIP (222 K)

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

TIDMAK9.PDF (1305 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
Test report 400-W AC/DC Reference Design for Avionics PDF | HTML Jun. 05, 2022

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