This evaluation board provides a reference design on PFC and LLC in a 6.6kW OBC system with SiC power devices and drivers, which mainly comprises of the high switching performance SiC diode (FFSP3065A), SiC mosfet (NVHL020N090SC1), 6A SiC mosfet driver (NCP51705MNTXG), 900V 60mΩ SiC mosfet (NVHL060N090SC1). With these high performance SiC devices, it achieves high efficiency (up to 95%) and power density. The full bridge LLC circuit with AEC qualified LLC resonant converter controller (NCV4390) boosts up the efficiency by high bus voltage usage. Meanwhile hardware PFC and LLC control realize easy design and less malfunction for users. Visit the On Board Charging solutions site to learn how onsemi can help you a comprehensive and advanced portfolio.
Features and Applications


  • SiC power devices and drivers
  • High power density, low current ripple
  • Efficiency up to 95% @Vin=220V/AC, Vbus=400V, Vout=430V, Full Load
  • FAN9673 - 3ch CCM (Continuous Conduction Mode) interleaved PFC controller
  • NCV4390 - Advanced Secondary Side LLC Resonant Converter Controller with Synchronous Rectifier Control
  • Adjustable bus voltage
  • Input voltage - 90~260Vac
  • Output voltage - 250~450Vdc


  • On Board Charger (OBC)
  • EV Charging
  • 3-Ph AC/DC conversion
Evaluation/Development Tool Information
Product Status Compliance Short Description Parts Used
6.6kW OBC SiC model FAN9673Q FFSP3065A
NCP51705MNTXG NCV1077P065G
NCV57000DWR2G NCV890100PDR2G
NVHL020N090SC1 NVHL060N090SC1
Technical Documents
Type Document Title Document ID/Size Rev
Eval Board: Manual 6.6 kW On Board EV Charger (SiC Model) Evaluation Board User's Manual EVBUM2731/D - 11578 KB  1 
Eval Board: BOM SEC-6D6KW-OBC-SIC-GEVB Control Bill of Materials (ROHS Compliant) SEC-6D6KW-OBC-SIC-GEVB_CONTROL_BOM_ROHS - 223 KB  0 
Eval Board: BOM SEC-6D6KW-OBC-SIC-GEVB LLC Bill of Materials (ROHS Compliant) SEC-6D6KW-OBC-SIC-GEVB_LLC_BOM_ROHS - 343 KB  0 
Eval Board: BOM SEC-6D6KW-OBC-SIC-GEVB Main Board Bill of Materials (ROHS Compliant) SEC-6D6KW-OBC-SIC-GEVB_MAIN_BOM_ROHS - 271 KB  0 
Eval Board: BOM SEC-6D6KW-OBC-SIC-GEVB PFC Bill of Materials (ROHS Compliant) SEC-6D6KW-OBC-SIC-GEVB_PFC_BOM_ROHS - 337 KB  0 
Eval Board: Schematic SEC-6D6KW-OBC-SIC-GEVB Schematic SEC-6D6KW-OBC-SIC-GEVB_SCHEMATIC - 3327 KB  0 
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