ELECTRONIC POWER STEERING (EPS) Products
Memory
Operational Amplifier
Comparator
Voltage Detector
(Reset ICs)
P.
P.
P.
5W rated power guaranteed in the
ultra-low-resistance region from
%"*ᄑ"
High power Ultra Low Ohmic Chip Shunt Resistors PSR Series
Supports a variety of drive circuits (i.e.
motors). Advanced processes provide low ON
resistances.
MOSFET 60V Series40V Series
P.47, P.54 to 55 DPAK P.
Technology for the automotive future
Electronic Power Steering (EPS) has seen increased adoption over hydraulic power steering in recent years, with most new
cars now being equipped with EPS. Shifting towards electrification eliminates the need for a power steering pump, reducing
the weight and reducing the overall fuel consumption by around 3%.
EPS also provides better driveability and performance by adjusting the torque via software based on vehicle speed, gener-
ating active torque when needed to improve vehicle safety. And additional driver support features such as lane and parking
assist are possible by expanding the EPS functionality.
EPS is achieved by detecting the steering position via a torque sensor, and the with motor is driven using a gate driver and
power transistor combination (see block diagram below). For controlling, motor feedback is used, the position and torque
output of the motor are adjusted based on the supply current to the motor.
+12V Battery
Torque
Sensor
I/O
Protection
Signal
Conditioner
Position
Sensor
Current
Sense
Power
Protection
CAN
Transceiver
MCU 3-Phase
Gate
Driver
Low Ohmic
Resistor
Voltage
Regulator
Bi-Zener
MOSFET SBDLow Ohmic
Resistor
MOSFET MOSFET
MOSFET
MOSFET
MOSFET
MOSFET MOSFET MOSFET
MOSFET
MOSFET
MOSFET
Memory Op.Amps
Comparators
PSR