- EV On-Board Charger
- EV Fast Charging
CRD-22DD12N

This reference design demonstrates the application of Wolfspeeds 1200V C3M™ SiC MOSFETs to create a 22kW Bi-directional High Efficiency DC/DC Converter for electric vehicle (EV) on-board (OBC) and off-board fast charging applications. This design is intended to work with an active-front-end (AFE) converter that adjusts the input voltage to the DC/DC converter to optimize the system efficiency based on the output (battery) voltage. The range of the DC input is designed to be compatible with both single and three-phase AFE systems while supporting a wide DC output voltage range of 480V-800V. A full bridge CLLC resonant converter with a flexible control scheme; implements frequency modulation; phase shift control; adaptive synchronous rectification and a bridge reconfiguration technique. The use of 1200V C3M™ 32mOhm SiC MOSFET’s in a TO- 247-4 package provides the best figure of merit (FOM) while reducing switching loss and cross talk.
The design accomplishes
- Peak efficiencies of 98.5% in both charging and discharging mode
- Power densities of 8kW/L
This reference design is offered as a comprehensive design package which can be used as a starting point for new SiC designs.
Specifications
Charging Mode
- Output Voltage : 480V-800V DC Nominal. System capable of 200V-800V DC
- At Vin=650V-900V DC ; Output Power : 22kW ; Output current : 36A
- At Vin=380V-900V DC ; Output Power : 6.6kW ; Output current : 26.4A
Discharging Mode
- Output Voltage : 360V-750V DC Nominal
- Output Power : 6.6kW ; Output current : 19A
- Full bridge CLLC resonant converter operating at 135-250kHz
- Tooled heatsink to simulate cooling plate
- CAN interface
Reference Design Files for
- Main board
- Controller Board
- Aux
- Firmware and GUI
- Mechanical Specifications
Documents, Tools & Support
- Block Diagram
- Technical & Sales Documents
- Tools & Support

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5A, High Voltage, Isolated Gate Driver with Internal Miller Clamp for Q1, Q2, Q3, Q4, Q7, Q16, Q17, Q18
5A, High Voltage, Isolated Gate Driver with Internal Miller Clamp for Q1, Q2, Q3, Q4, Q7, Q16, Q17, Q18
MCU with control algorithms for the AC-DC and DC-DC Stages

Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode

Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode

Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode

Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode

Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode

Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode

Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode

Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode