Single-stage AC/DC LCC resonant converter reference design


Design files


This reference design provides up to 265-W constant voltage and constant current output from a 120-VAC input with a single-stage LCC resonant converter stage. The BOM-cost of this design is highly optimized with the single-stage structure and use of the driver-integrated LLC resonant controller UCC256403. A primary side regulated flyback with UCC28910 is applied as a bias converter and allows you to turn the main power stage on/off. This design can achieve 88% peak efficiency with more than 200-kHz switching frequency at 120 VAC.

  • 120-VAC input to 6-V to 22-V/12-A output
  • Single-stage AC-DC converter
  • Peak efficiency: 91.9% at 200-VDC and 88.2% at 120-VAC input
  • LCC resonant converter for wide input and output ranges
  • Both constant current and constant voltage controls enabled
  • Length x width = 6.2" x 4.2"
Output voltage options PMP22083.1
Vin (Min) (V) 102
Vin (Max) (V) 132
Vout (Nom) (V) 22
Iout (Max) (A) 12
Output Power (W) 264
Isolated/Non-Isolated Isolated
Input Type AC
Topology Half Bridge- 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

Download ready-to-use system files to speed your design process.

TIDT192.PDF (2678 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDM760.PDF (314 K)

Detailed schematic diagram for design layout and components

TIDM761.PDF (327 K)

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

TIDM762.PDF (312 K)

Detailed overview of design layout for component placement

TIDM764.ZIP (1683 K)

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

TIDCFY6.ZIP (1865 K)

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

TIDM763.PDF (993 K)

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)

UCC256403LLC resonant controller with ultra-low power and ultra-quiet standby operation

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

UCC28910700V Flyback switcher with constant-voltage constant-current and primary-side control

Data sheet: PDF | HTML
Analog current-sense amplifiers

INA18026V, 350kHz current sense amplifier

Data sheet: PDF | HTML
General-purpose op amps

LM324Quad 30-V 1.2-MHz operational amplifier

Data sheet: PDF | HTML

CSD19505KCS80-V, N channel NexFET™ power MOSFET, single TO-220, 3.1 mOhm

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report Single Stage AC/DC LCC Resonant Converter Reference Design PDF | HTML Oct. 07, 2020

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