25 kW, dual active bridge bidirectional power converter for EV charging and
Introduction
This reference design represents a complete solution for high power bidirectional DC-DC power converter in dual active bridge
topology based on ACEPACK2 SiC power modules. An STM32G474 MCU Mixed-Signal digital platform optimized for Digital
Power is used to control the power converter. The latest generation SiC power modules and high-frequency operation (100 kHz)
ensure very high performance and design optimization. Soft switching DAB behavior is managed by modulation techniques
according to load/voltage variation.
This reference design consists of the following separate modules:
•
STDES-DABBIDIRP: main power board with ACEPACK 2 SiC power modules, a full bridge A2F12M12W2-F1 and two
A2H6M12W3-F for primary HV side and secondary LV side, respectively. The power board design also includes bulk
capacitors, sensing sections, and auxiliary power supply.
•
STDES-DABBIDIRDF: driver board for full bridge ACEPACK 2 A2F12M12W2-F1 SiC power modules based on
STGAP2SiCS Galvanically isolated 4 A single gate driver for SiC MOSFETs
•
STDES-DABBIDIRDH: two driver boards for half bridges ACEPACK2 A2H6M12W3-F SiC power modules based on
STGAP2SiCS galvanically isolated 4 A single gate driver for SiC MOSFETs
•
STDES-PFCBIDIRC: control board based on the STM32G4 series microcontroller with connectors for communication and
programming, and test-points and status indicators for testing and monitoring.
The latest technology SiC MOSFETs power modules used at high switching frequency (100 kHz) and the topology structure
allow nearly 98% efficiency and the use of smaller and more cost-effective passive power components.
This high efficiency bidirectional isolated DC-DC converter is designed for several end applications such as electric vehicles
(EV) and industrial battery chargers, and industrial equipment requiring very high efficiency and reliability.
UM3198 - Rev 1 - December 2023
For further information contact your local STMicroelectronics sales office.
Figure 1.
STDES-DABBIDIR reference design board
battery energy storage systems
UM3198
User manual
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