STDES-7KWOBC

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7 kW on-board charger (OBC) reference design

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Parameter NameParameter Value
Operating RangeIndustrial
Core ProductSPC58NN84E7, STH47N60DM6-7AG, TN3050H-12GY-TR, SCTH35N65G2V-7AG
GradeIndustrial
Key features
  • Front end PFC stage using 2-channel interleaved totem pole topology operating at 70 kHz
  • Digital inrush current control
  • DC-DC stage using FB LLC resonant topology with 140 kHz resonant frequency
  • Constant current and constant voltage mode
  • Control stage based on SPC58NN84E7
  • 12 V input supply voltage galvanically isolated from output voltage GND (high voltage battery)
  • Bus bar interconnection possibility
  • RoHs compliant
  • PFC:
    • Key products: TN3050H-12GY-TR SCRs, STBR3012G2Y bypass diodes, SCTH35N65G2V-7AG SiC power MOSFET
    • Input: 85 to 265 VAC, 45 to 65 Hz
    • Digital inrush current limiter
    • Max. input current: 32 Arms
    • Switching frequency: 70 kHz
    • Average current mode control in continuous conduction mode (CCM)
    • PID or 2p2z 2x independent current loop regulators
    • PID or 2p2pz voltage regulator
    • SPC58NN84E7 MCU controller
  • DC-DC:
    • Key products: STH47N60DM6-7AG power MOSFET, STPSC20065GY-TR output diodes, A6387 gate driver
    • Output voltage: 250 to 450 VDC
    • Switching frequency: 92 to 250 kHz with start-up at 350 kHz
    • Two independent current loops (CC)
    • One voltage loop plus current balancing (CV)
    • PID regulators
    • SPC58NN84E7 MCU controller