Features
•
3-phase, 3-level bidirectional AC/DC power converter:
– Rated nominal DC voltage: 800 V
DC
– Rated nominal AC voltage: 400 V
AC
@ 50 Hz
– Nominal power: 15 kW
• AC to DC rectifier mode:
– Power factor control (PFC) PF > 0.99
– Inrush current control and soft start-up
• DC to AC inverter mode:
– Active and reactive power control
– Integrated grid connection solution
• Power section based on SiC MOSFETs:
– High frequency operation (100 kHz)
– High efficiency, η = 99%
– Passive element weight and size reduction
• Control section based on STM32G474RE microcontroller:
– P2P compatible with other STDES 3-phase power converters
– 4 integrated high-performance op-amps
– Control and monitoring interfaces: SWIM, UART, I²C, DACs
– 64-pin Digital Power connector
– Overcurrent and overvoltage protection
– Configurable topology (2 – 3 levels)
Description
This reference design represents a complete solution for three-phase AC/DC and
DC/AC (800 V
DC
to 400 V
AC
) applications based on a digital platform optimized for
power conversion.
It is well suited for the Active Front End (AFE) stage in high power charging stations,
industrial battery chargers and UPS. The high switching frequency of the SiC
MOSFETs and the multilevel structure allow nearly 99% efficiency as well as the
optimization of passive power components in terms of size and cost.
Product summary
15 kW, 3-level,
3-phase
bidirectional
converter
STDES-PFCBIDIR
firmware for 15
kW
, 3-lvl, 3-ph,
bidirectional
converter
STSW-PFCBIDIR
Mainstream Arm
Cortex-M4 core
with DSP and
FPU, 170MHz
with 512Kbytes
of Flash
memory
, Math
Accelerator, HR
Timer, High
Analog level
integration
STM32G474RE
SiC Power
MOSFET 650 V
,
45 A, 55 mΩ in
HiP247 package
SCTW35N65G2V
15 kW, three-phase, three-level Active Front End (AFE) bidirectional converter for
industrial and electric vehicle DC fast charging applications
STDES-PFCBIDIR
Data brief
DB4071 - Rev 1 - November 2019
For further information contact your local STMicroelectronics sales of
fice.
www.st.com
Product summary
Automotive-
grade SiC Power
MOSFET 1200
V
, 33 A, 75 mΩ
in HiP247
package
SCTW40N120G2VAG
galvanically
isolated 4 A
single gate
driver
STGAP2SM
energy saving
12W high
voltage
converter with
direct feedback
VIPER26HD
Applications
PFC Converter - Three
Phase Input
DC Fast Charging
Station
STDES-PFCBIDIR
DB4071 - Rev 1
page 2/16