SEC-3PH-11-OBC-EVB: Three-phase On Board Charger (OBC) PFC-LLC platform

The SEC-3PH-11-OBC-EVB is a three-phase On Board Charger (OBC) reference design platform achieving state-of-the-art system efficiency with AEC qualified SiC power devices and drivers. The system boasts the high performance SiC MOSFET 1200 V, 80 m? (NVHL080N120SC1), SiC MOSFET Gate driver 6A (NCV51705) and SiC Diode 650 V, 30 A (FFSB3065B-F085). For test data results, the LLC system was driven in voltage or current control modes by embedded software. This reference design provides internal test results, as well as the files needed to copy the hardware design. The GUI software is provided as a reference only and the embedded software is not provided. Ultimately, SEC-3PH-11-OBC-EVB serves as a strong starting point for a customer design incorporating three-phase AC/DC power conversion. Visit the On Board Charging solutions site to learn how onsemi can accelerate your design with our innovative portfolio.
Features and Applications


  • AEC-Q qualified SiC power devices and drivers
  • DC/DC LLC full bridge
  • Executable software FOC (Vector Control), CC and CV
  • GUI
  • Input Voltage - 195-265 Vac
  • DC Bus Max - 735 Vdc
  • Output Voltage - 200-450 Vdc
  • Output Current - 0-40A
  • fs max. 400 kHz


  • Proven state-of-the-art achievable efficiency (>95%)
  • Building know-how on of 3-Ph PFC / LLC topology systems


  • On board charger (OBC)
  • EV Charging
  • 3-Ph AC/DC conversion
Evaluation/Development Tool Information
Product Status Compliance Short Description Parts Used
SEC-3PH-11-OBC-EVB Active
Three-phase On Board Charger (OBC) PFC-LLC platform FFSB3065B-F085 NCV210RSQT2G
Technical Documents
Type Document Title Document ID/Size Rev
Reference Designs On Board Charger (OBC) LLC Converter TND6318/D - 4494 KB  0 
Application Notes On Board Charger (OBC) Three-phase PFC Converter AND9957/D - 1197 KB  3 
Eval Board: Manual SEC-3PH-11-OBC-EVB Evaluation Board User's Manual EVBUM2673/D - 8402 KB  3 
Eval Board: BOM SEC-3PH-11-OBC-EVB_LLC Bill of Materials (ROHS Compliant) SEC-3PH-11-OBC-EVB_LLC_BOM_ROHS.rev0 - 644 KB  1 
Eval Board: BOM SEC-3PH-11-OBC-EVB_PFC Bill of Materials (ROHS Compliant) SEC-3PH-11-OBC-EVB_PFC_BOM_ROHS - 672 KB  1 
Software SEC-3PH-11-OBC-EVB_LLC Graphical User Interface SEC-3PH-11-OBC-EVB_LLC_GUI - 30979 KB Locked  1 
Eval Board: Schematic OBC_LLC_resonant_tank_WE_3D_Schematic OBC_LLC_resonant_tank_WE_3D_Schematic - 4101 KB  0 
Eval Board: Schematic OBC_LLC_resonant_tank_WE_Schematic OBC_LLC_resonant_tank_WE_Schematic - 4359 KB  0 
Eval Board: Schematic OBC_LLC_switch_board_3D_Schematic OBC_LLC_switch_board_3D_Schematic - 11010 KB  0 
Eval Board: Schematic OBC_LLC_switch_board_Schematic OBC_LLC_switch_board_Schematic - 10638 KB  0 
Eval Board: Schematic SiC_driver_board_3D_Schematic SiC_driver_board_3D_Schematic - 454 KB  0 
Eval Board: Schematic SiC_driver_board_Schematic SiC_driver_board_Schematic - 215 KB  0 
Eval Board: Schematic OBC_PFC_power_3D_Schematic OBC_PFC_power_3D_Schematic - 20198 KB  0 
Eval Board: Schematic OBC_PFC_control_Schematic OBC_PFC_control_Schematic - 1974 KB  0 
Eval Board: Schematic OBC_PFC_power_Schematic OBC_PFC_power_Schematic - 1948 KB  0 
Video Electric Vehicle On-Board Charger Walkthrough WVD17365/D   
Eval Board: Gerber SEC-3PH-11-OBC-EVB Manufacturing Files SEC-3PH-11-OBC-EVB_Manufacturing_Files - 58472 KB  1 
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