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22 kW Bi-Directional CLLC

Product Shot of Wolfspeed's Reference Design of a 22kW Bi-directional High Efficiency DC/DC Converter
CRD-22DD12N
This reference design demonstrates the application of Wolfspeed’s 1200V 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. The C3M™ series MOSFETs are ideally suited for off-board fast charging, while the automotive qualified E-Series E3M devices are ready for the most challenging on-board 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 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
Applications
  • EV On-Board Charger
  • EV Fast Charging
What's Included

Reference Design Files for

  • Main board
  • Controller Board
  • Aux
Request Separately
  • Firmware and GUI
  • Mechanical Specifications

Documents, Tools & Support

crd 22dd12n block diagram
DC-DC Converter

2W Isolated DC-DC Converter Vin=15V, Vout= -3V/15V

DC-DC Converter

2W Isolated DC-DC Converter Vin=15V, Vout= -3V/15V

UCC5350

5A, High Voltage, Isolated Gate Driver with Internal Miller Clamp for Q1, Q2, Q3, Q4, Q7, Q16, Q17, Q18

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UCC5350

5A, High Voltage, Isolated Gate Driver with Internal Miller Clamp for Q1, Q2, Q3, Q4, Q7, Q16, Q17, Q18

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F2837x C2000 real-time microcontroller

MCU with control algorithms for the AC-DC and DC-DC Stages

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Image that includes both the front and back of the TO-247-4 package used for Wolfspeed's discrete Silicon Carbide power devices including SiC MOSFETs and Schottky diodes.
C3M0032120K or E3M0032120K

C3M0032120K
Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode
View Product

E3M0032120K
Gen 3 Discrete Silicon Carbide Power MOSFET E-Series Automotive N-Channel Enhancement Mode
View Product

Image that includes both the front and back of the TO-247-4 package used for Wolfspeed's discrete Silicon Carbide power devices including SiC MOSFETs and Schottky diodes.
C3M0032120K or E3M0032120K

C3M0032120K
Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode
View Product

E3M0032120K
Gen 3 Discrete Silicon Carbide Power MOSFET E-Series Automotive N-Channel Enhancement Mode
View Product

Image that includes both the front and back of the TO-247-4 package used for Wolfspeed's discrete Silicon Carbide power devices including SiC MOSFETs and Schottky diodes.
C3M0032120K or E3M0032120K

C3M0032120K
Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode
View Product

E3M0032120K
Gen 3 Discrete Silicon Carbide Power MOSFET E-Series Automotive N-Channel Enhancement Mode
View Product

Image that includes both the front and back of the TO-247-4 package used for Wolfspeed's discrete Silicon Carbide power devices including SiC MOSFETs and Schottky diodes.
C3M0032120K or E3M0032120K

C3M0032120K
Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode
View Product

E3M0032120K
Gen 3 Discrete Silicon Carbide Power MOSFET E-Series Automotive N-Channel Enhancement Mode
View Product

Image that includes both the front and back of the TO-247-4 package used for Wolfspeed's discrete Silicon Carbide power devices including SiC MOSFETs and Schottky diodes.
C3M0032120K or E3M0032120K

C3M0032120K
Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode
View Product

E3M0032120K
Gen 3 Discrete Silicon Carbide Power MOSFET E-Series Automotive N-Channel Enhancement Mode
View Product

Image that includes both the front and back of the TO-247-4 package used for Wolfspeed's discrete Silicon Carbide power devices including SiC MOSFETs and Schottky diodes.
C3M0032120K or E3M0032120K

C3M0032120K
Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode
View Product

E3M0032120K
Gen 3 Discrete Silicon Carbide Power MOSFET E-Series Automotive N-Channel Enhancement Mode
View Product

Image that includes both the front and back of the TO-247-4 package used for Wolfspeed's discrete Silicon Carbide power devices including SiC MOSFETs and Schottky diodes.
C3M0032120K or E3M0032120K

C3M0032120K
Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode
View Product

E3M0032120K
Gen 3 Discrete Silicon Carbide Power MOSFET E-Series Automotive N-Channel Enhancement Mode
View Product

Image that includes both the front and back of the TO-247-4 package used for Wolfspeed's discrete Silicon Carbide power devices including SiC MOSFETs and Schottky diodes.
C3M0032120K or E3M0032120K

C3M0032120K
Silicon Carbide Power 1200V MOSFET C3M™ Planar MOSFET Technology N-Channel Enhancement Mode
View Product

E3M0032120K
Gen 3 Discrete Silicon Carbide Power MOSFET E-Series Automotive N-Channel Enhancement Mode
View Product

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