AUTOMOTIVE_Catalog_Ver.2.1

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