AUTOMOTIVE_Catalog_Ver.2.1

Motor

Low Voltage ECU

DC/DC Converter

Low Voltage Battery

High

Voltage

Batteries

The main inverter converts the constant DC voltage from the battery into a 3-phase AC voltage to drive the motors.

ROHM is developing a wide variety of high reliability isolated gate drivers optimized for the main inverters.

And although power devices such as IGBTs with integrated protection diodes are commonly used, SiC MOSFETs and SiC

SBDs is seeing greater adoption due to their lower RDS(ON) and the resulting switching losses.

ROHM, a pioneer in SiC devices, also offers products designed for industrial and automotive applications that demand

extreme reliability. In addition, ROHM utilizes on-chip transformer technology to design gate drivers that feature built-in

isolation, contributing to greater miniaturization and longer life.

MAIN INVERTER

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Low Voltage
MAIN INVERTER Products
High Voltage
Technology for the automotive future
Isolates the high and low-
voltage sides, enabling fast, safe
signal transmission.
Isolators BM67220FVBM67221FV--CC
SSOP-B20W
Monitors the temperature of
the IGBT, SiC and Power
MOSFET.
Temperature Monitor BM66002FV-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
SSOP-B
5W rated power guaranteed in
the ultra-low-resistance region
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High power Ultra Low Ohmic
Chip Shunt Resistors PSR^
PSR
Memory
Operational Amplifier
Comparator
Voltage Detector
(Reset ICs)
P.
P.
P.
Protects the IGBT by sending
voltage data to the MCU to
prevent excessive IGBT drive
voltage.
High Voltage Monitor BM67290FV-C
SSOP-B20W
Memory
Operational Amplif ier
Comparator
Voltage Detector
( Reset IC )
P.31 P.23 P.
P.31 P.32 P.
LV
Battery
LV Power
Supply
High Voltage Monitor
Isolation DC/DC Power Supply
Isolator
Motor
Resolver
MCU
Isolated
Gate Driver
U
V
W
Isolated
Gate Driver
Isolated
Gate Driver
Isolated
Gate Driver
Isolated
Gate Driver
HV Bat tery
Isolated
Gate Driver
MOSFET SBD Low OhmicResistor
Low OhmicResistor
Temperature Monitor IC