Low Voltage High Voltage
Automotive (onboard) chargers are AC/DC converters that
convert the household AC (100V to 240V) supply to DC in
order to charge the high voltage battery array. To ensure
universal compatibility, most onboard chargers support a
wide voltage range, usually between 85V and 265V. However,
due to input voltage fluctuations, safer and more efficient
devices are required.
In addition to isolator ICs, ROHM offers a broad range of
power devices, including SiC SBDs.
ONBOARD CHARGER Products
Isolates the high and low-
voltage sides, enabling fast,
safe signal transmission.
Isolators BM67220FV-CBM67221FV-C
SSOP-B20W
Monitors the temperature of
the IGBT, SiC and Power
MOSFET.
Temperature Monitor BM66002FV-C
SSOP-B20W
Monitors the output voltage of
the DC/DC converter.
High Voltage Monitor BM67290FV-C
SSOP-B20W
Integrates isolation and gate
driver functions into a compact
SSOP-B20W package.
Isolated Gate Driver BM6104FV-C
SSOP-B20W
Isolated boost-buck power
supply IC that provides
regulated power to the MCU.
Power Supply IC BD9031FV-C
Industry-low VF provides
unmatched circuit efficiency.
SiC-SBD SiC-SBD Series
TO-220AC
2pin
ON BOARD CHARGER
Batteries
Memory
Operational Amplifier
Comparator
Voltage Detector
(Reset ICs)
P.
P.
P.
Technology for the automotive future
P.
P.23 P.
P.32 P.31 P.
SSOP-B
Interface
VDC= 200 to 400V
Temperature
Signal
AC Line
85 to 265V
MCU
Isolator
Isolated Gate
Driver
Isolated
Gate Driver
LV Power
Supply
High Voltage
Monitor
Temperature
Monitor IC
MOSFET
MOSFET
MOSFET MOSFET
MOSFET
Low Ohmic
Resistor
SiC-SBD
FRD
FRD
Memory
Op.Amps
Comparators
Voltage Detectors
(Reset IC)
5W rated power guaranteed in
the ultra-low-resistance region
High power Ultra Low
Ohmic Chip Shunt Resistors PSR Series
P.81 PSR