Infineon Angle Sensors for Automotive Applications

Infineon Angle Sensors For Automotive Applications

Angle Sensors at a glance

Page 2 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.

detects the angle of a magnet

is factory calibrated

is ideal for Steering angle and Brushless DC motors

is available with analog or digital outputs

An Angle Sensor…

Angle Sensor based on integrated Magneto Resistive (ixMR) Technologies

Infineon Angle Sensors

The sensor detects the orientation of an applied magnetic field by measuring sine and cosine angle components with monolithically integrated magneto resistive elements

Magneto resistive technology is now widely used in automotive applications such as Steering angle, Electric Power Steering (EPS) and Throttle

Page 3 Copyright © Infineon Technologies AG 2013. All rights reserved.

Inplane sensitivity

High sensitivity

Low Jitter

3600 angle range

For fields up to 80mT

Monolithically integrated in CMOS, BiCMOS

Inplane sensitivity

High sensitivity

Low Jitter

1800 angle range

Medium field range

Monolithically integrated in CMOS, BiCMOS

GMR AMR

Hexternal

Permalloy80% Ni / 20% Fe

I

M

ixMR Technologies

Low Sensitivity to air gap variation

The ixMR element senses a field’s direction, not intensity. Variations in field intensity within the sensor’s range therefore have minimal impact on angle accuracy

Improved tolerance to misalignment

The area sensitive to ixMR is very small. Therefore it is easier to keep it within the homogenous zone of the magnetic field in case of small mechanical failure.

High speed

ixMR technology is extremely fast. Its speed is not limited by the reaction time of the MR element but by delay in the amplifier circuit

Infineon´s ixMR technology is fast and robust against Mechanical Tolerances

Infineon

Angle

Sensor


Monolithically integrated Magneto Resistivity sensing element for better reliability and cost

High update rate up to 43µs (23kHz) for Motor commutation applications

Incremental interface output for easy replacement of optical encoders

Factory calibrated for best accuracy over temperature

Unambiguous output over 3600 allowing better motor control and noise performance

Up to two parallel interface for optimal safety concept integration



More than a Sensing Element: Integrated and calibrated Angle Sensors

Angle Sensor for Automotive Applications


Brushless DC Rotor Position Sensing (e.g. EPS, Actuators)

An angle sensor on the shaft of a Brushless DC motor allows to replace the resolver for lower cost solution

360O range

Low delay

Dual die for redundancy

Two interfaces operating in parallel

High accuracy through internal auto-calibration

Sensor Requirement

Infineon Solution

TLE5009

TLE5012B

Fig: Angle sensor acting as rotor position sensor example

Angle Sensor for Automotive Applications


TLE5009

TLE5011

TLE5012B

360O range

Low delay

Low cost

Functional safety features

Calculated angle

PWM/SPC interface

Sensor Requirement

Infineon Solution

Nonius Principle measure more accurately than could be done by reading a uniformly-divided straight or circular measurement scale. For Infineon, this principle allows to measure the steering angle over several turns and provides some redundancy for safety purposes Fig: Nonius scale

0

20

40

60

80

100

120

140

160

180

0 200 400 600 800 1000 1200 1400

Fig: Steering angle calculation example using Nonius Principle

Steering Angle

Product Portfolio: From single analog to complex digital sensors

0110100 Digital angle TLE5012B

0110100

1101010 Digital sin/cos TLE5011

Analog sin/cos TLE5009 TLE5109


Bloc Diagram Interface Type Output Format IFX Solution

NEW

TLE5012B: 3600 Digital Angle Sensors

Rotor position sensing for electric motor commutation

Steering angle sensing

General angular sensing

Application

Description

Key features

Designed for 3.3V & 5V systems

15bit absolute angle resolution

42µs update-rate of calc. angle

SPI with 8Mbit/s

Interfaces: HSM, IIF, SPI, PWM, SPC

≤1° angle error over all

Automotive qualified (-40°C /150°C)

Unambiguous detection on measurement over 360º angle range

Smallest angle error over lifetime and temperature

Integrated angle calculation

High update rate and resolution best for dynamic applications

Two parallel interfaces available

Extended range of safety features


TLE5011: 3600 Digital Angle Sensors

Rotor position sensing for electric motor commutation

Steering angle sensing

Valve or flap position sensing

Application

Description

Key features

Designed for 3.3V & 5V systems

360° angle range

16 bit sin/cos values

Interfaces: SSC (SPI) upto 2Mbit/s

Internal diagnostics

Automotive qualified (-40°C /150°C)


Digital, 16 bit sine/cos output

Integrated data processing

High update rate and resolution best for dynamic applications

Extended range of safety features


TLE5009: 3600 Analog Angle Sensors

Steering angle

Brushless DC motor commutation

Rotary switch


Application

Description

Key features

Analog output of sine and cosine

Constant amplitude over temperature

Built in offset temperature compensation

~9µs delay time

≤3° angle error

Up to 30,000rpm

Automotive qualified -40°C /150°C


Preamplified signals no additional amplifier necessary

Temperature compensated amplitudes use of full ADC-range over temperature

Single ended and differential analog output independent of used µC

Diagnostic functions improve of safety level


TLE5109: 1800 Analog Angle Sensors

Steering angle

Brushless DC motor commutation

Rotary switch


Application

Description

Key features

Analog output of sine and cosine

Constant amplitude over temperature

Built in offset temperature compensation

~9µs delay time

≤1.2° angle error

Up to 30,000rpm

Automotive qualified 125°C


Preamplified signals no additional amplifier necessary

Temperature compensated amplitudes use of full ADC-range over temperature

Single ended and differential analog output independent of used µC

Diagnostic functions improve of safety level


NEW


Infineon has already established a very strong position in the automotive sector with the broadest magnetic sensor portfolio in the market

We have shipped over 2 billion magnetic sensors to customers in the automotive, consumer and industrial application sector

Angle sensor detects angle based on Monolithically integrated Magneto Resistive (iXMR) technologies for better reliability and cost

Factory calibrated angle sensors for down to 1.00 accuracy

Angle sensors for automotive applications such as Steering angle, Brushless DC rotor position steering

We offer various products featuring analog or digital outputs

Infineon Sensors – Making lives easier, safer and more comfortable


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Infineon Angle Sensors for Automotive Applications