LLC Resonant converter control card reference design


Design files


This reference design is a control card for an LLC converter and integrates all of the essential functions for controlling an LLC converter, including the HV start-up, X-capacitor discharge and the drivers for the power FETs. By employing the advanced burst mode, it can also help the LLC converter achieve ultra-low standby power even with PFC on. This design is flexible to evaluate and is suitable for any power rating of an LLC power board. It is easy to set up a bench test with an existing power stage with simple connections. 

  • Single-chip solution with essential functions for LLC
  • Integrated HV startup and driver
  • Best-in-class load and line transition response
  • Low standby power consumption
  • X-cap discharge
Output voltage options PMP22088.1
Vin (Min) (V) 90
Vin (Max) (V) 264
Vout (Nom) (V) 24
Iout (Max) (A) 14
Output Power (W) 336
Isolated/Non-Isolated Isolated
Input Type AC
Topology Boost- PFC^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.

TIDT114.PDF (1063 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

TIDRZY6.ZIP (1653 K)

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


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.

LLC controllers

UCC256404LLC resonant controller with ultra-low power, ultra-quiet standby operation and high voltage startup

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report LLC Resonant Converter Control Card Reference Design Jun. 26, 2019

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