infineon angle sensors for automotive applications
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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
Page 4 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
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
Infineon Angle Sensors
Page 5 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
More than a Sensing Element: Integrated and calibrated Angle Sensors
Angle Sensor for Automotive Applications
Page 6 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
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
Page 7 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
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
Page 8 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
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
Page 9 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
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)
Unambiguous detection on measurement over 360º angle range
Digital, 16 bit sine/cos output
Integrated data processing
High update rate and resolution best for dynamic applications
Extended range of safety features
Page 10 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
TLE5009: 3600 Analog Angle Sensors
Steering angle
Brushless DC motor commutation
Rotary switch
General angular sensing
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
Unambiguous detection on measurement over 360º angle range
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
Page 11 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
TLE5109: 1800 Analog Angle Sensors
Steering angle
Brushless DC motor commutation
Rotary switch
General angular sensing
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
Unambiguous detection on measurement over 180º angle range
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
Page 12 2013-06-26 Copyright © Infineon Technologies AG 2013. All rights reserved.
NEW
Infineon Angle Sensors
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
Page 13 2013-05-02 Copyright © Infineon Technologies AG 2013. All rights reserved.
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