ST SPC560P34 - Target Applications; Application Examples; Figure 1. Electric Power Steering Application

RM0046 Introduction
Doc ID 16912 Rev 5 47/936
1.2 Target applications
The SPC560P40/34 belongs to an expanding range of automotive-focused products
designed to address and target the following chassis and safety market segments:
● Electric hydraulic power steering (EHPS)
● Lower end of electric power steering (EPS)
● Airbag applications
● Anti-lock braking systems (ABS)
● Motor control applications
EHPS and EPS systems typically feature sophisticated and advanced electrical motor
control periphery with special enhancements in the area of pulse width modulation, highly
flexible timers, and functional safety.
1.2.1 Application examples
Electric power steering
Figure 1 outlines a typical electric power steering application built around the
SPC560P40/34 microcontroller.
Figure 1. Electric power steering application
Position Sensor
Gearbox
Sensor
Load
Position Sensor
Physical Layer
To rq ue
Relay
Relay Driver
Signal
Conditioning
Circuitry
Driver
PWM
3-phase Low Voltage Power Stage
PMSM
Signal
Conditioning
Circuitry
Driver
Reverse Bat
Protection
Fast ADC
<1 µs, 10-bit
Timer
Safety Port
Core
FlexCAN
Faults
Motor
Control
PWM
10 ns res
DSPI
SPC560P40/34
Vcc Vanalog Vref
Vcc
Vanalog
Vref
ID
System
Basis
Chip
Windowed
Watchdog
Hi-speed CAN
Physical Layer
CAN
Complex
Hardware
Watchdog
Input
Modules
Output Drivers
(Valves, Pump)
Sensors
n
n
Safety Relay
U DC Bus