TLE5046iC Technical product description High End GMR Wheel Speed Sensor with direction detection, ASIL B(D) About this document Scope and purpose High-level description of the product features and technical characteristics as primary information about the functionality of the TLE5046iC High End GMR Wheel Speed Sensor with direction detection, ASIL B(D) Intended audience Automotive suppliers interested in wheel speed sensor applications About this product Description Infineon's TLE5046iC is a wheel speed sensor with direction detection designed for sophisticated vehicle control systems. TLE5046iC shows best-in-class jitter performance, thus being the best choice for wheel speed applications. The rotational speed is sensed with high accuracy, enabling the sensor to be used as a component of indirect tire pressure monitoring systems (iTPMS). It is based on integrated giant magneto resistance (iGMR). Excellent sensitivity to magnetic field is specified over a wide temperature range. To meet harsh automotive requirements, robustness to electrostatic discharge (ESD) and electromagnetic compatibility (EMC) was maximized without the need of additional external components. Figure 1 Product photo Technical Product Description www.infineon.com Please read the Important Notice and Warnings at the end of this document Revision 1.0 2018-11-06 TLE5046iC Technical product description About this product Features & Benefits * * * * * * * * * * Developed according to ISO 26262, compliant with the requirements of ASIL B(D) Low jitter 0.02% due to high switching accuracy enables iTPMS Two-wire current interface providing speed and direction information Advanced stop-start capabilities enabled by - Innovative watchdog concept to guarantee maximum signal availability - No loss of direction information during start-stop condition Wide operating junction temperature range -40C to 190C Robustness against external magnetic disturbances up to 2mT through differential sensing principle High sensitivity enables outstanding air gap performance along with immunity against y-displacement effects Small sensor package 5x3mm without need of external capacitor saves module size, increases robustness against mechanical stress, and enables design freedom Advanced EMC concept maximizes the availability of the sensor signal New established Micro Break feature designed to be immune against disturbances on supply line Order Information Table 1 Type Description Ordering Number TLE5046iC-PWM-R050 Speed sensor with direction detection and PWM protocol, optimized for use with load resistor Rm 50 SP001649090 TLE5046iC-PWM-R100 Speed sensor with direction detection and PWM protocol, optimized for use with load resistor 50 Rm 100 SP001345916 TLE5046iC-PWME-R050 Speed sensor with direction detection, additional selfdiagnostics, and PWM protocol, optimized for use with load resistor Rm 50 SP001673834 TLE5046iC-PWME-R100 Speed sensor with direction detection, additional selfdiagnostics, and PWM protocol, optimized for use with load resistor 50 Rm 100 SP001673840 TLE5046iC-AK-LR Speed sensor with direction detection and AK protocol SP001418756 TLE5046iC-AK-ERR Speed sensor with direction detection, additional selfdiagnostics, and AK protocol SP001615796 Technical Product Description 2 Revision 1.0 2018-11-06 TLE5046iC Technical product description Table of contents Table of contents About this document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 About this product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1 Product Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 3 PWM Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 AK Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 5 Safety Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 ESD and EMC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 ESD HBM Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 8 Product Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 9 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 10 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 11 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Technical Product Description 3 Revision 1.0 2018-11-06 TLE5046iC Technical product description 1 Product Characteristics 1 Product Characteristics Absolute Maximum Ratings Stresses above the maximum values listed here may cause permanent damage to the device. Table 2 Parameter Symbol Min. Typ. Max. Unit Note / Test Condition Supply voltage VDD - - 24 V max. 30 min @ TJ = 25 +/- 5C -0.6 - - V TJ < 80C, IDD reverse current limit applies Reverse current IDD -200 - - mA t = max 4 h Junction temperature TJ -40 - 190 C max 4 h, < 16.5 V Magnetic flux density Bmax_x Bmax_y - - 250 mT max. 1min @ TA 85C Bmax_z - - 500 mT max. 1min @ TA 85C Operating Range The following operating conditions must not be exceeded in order to ensure correct operation. Table 3 Parameter Symbol Min. Typ. Max. Unit Note / Test Condition Supply voltage VDD 5.2 - 20 V TLE5046iC-AK*, TLE5046iC-PWM*R100 VDD 4.25 - 20 V TLE5046iC-PWM*-R050 Operating Temperature TJ -40 190 C Magnetic signal frequency fmag 0 - 3000 Hz Minimum differential magnetic dBlimit_x 70 input signal amplitude, TA = 25C magnetic encoder application 90 110 T Magnetic induction amplitude Bx at each GMR sensing element -25 - 25 mT Dynamic and static homogeneous external disturbance fields -2 2 mT Technical Product Description Bext_XYZ 4 99% criterium no unwanted pulses Revision 1.0 2018-11-06 TLE5046iC Technical product description 1 Product Characteristics Functional Parameters The magnetic input is assumed sinusoidal with constant amplitude and offset. The typical values shown below are valid for VDD = 12 V and TA = 25C. For a more detailed specification please refer to our product datasheets which are available on request. Table 4 Parameter Symbol Min. Typ. Period jitter Sjit - 0.02 Duty cycle DC 40 - Supply current during static output low state Ilow 5.95 Supply current during static output mid state (AK), or high state (PWM) Imid Ihigh Supply current during static output high state (AK) Max. Unit Note / Test Condition % 1 value 60 % in calibrated mode 7 8.05 mA 11.9 14 16.1 mA Ihigh 23.8 28 32.2 mA Current level for indicating errors IError 1 3.5 3.8 mA Output current slew rate SRr, SRf 11 - 28 mA/ s SRr = (I90% - I10%) / tr SRf = (I90% - I10%) / tf Switch-off voltage Vreset 3.5 V direct on sensor pins Supply voltage hysteresis VHys 1.5 1.7 V TLE5046iC-AK*, TLE5046iC-PWM*R100 Supply voltage hysteresis VHys 0.65 0.75 V TLE5046iC-PWM*-R050 Technical Product Description 5 Revision 1.0 2018-11-06 TLE5046iC Technical product description 2 Functional Description 2 Functional Description The sensor element has a magnetic interface to detect the increments of a magnetized encoder: the sensing principle is based on the giant magneto resistance (GMR) principle sensitive to magnetic fields in x-direction. It is designed for maximum sensitivity and suppression of homogeneous fields. In the figure below the typical placement of the TLE5046iC facing a magnetic encoder wheel is shown. The figure also indicates the coordinate system, which is valid throughout this document. Figure 2 Typical placement of the TLE5046iC Technical Product Description 6 Revision 1.0 2018-11-06 TLE5046iC Technical product description 3 PWM Protocol 3 PWM Protocol The output has been designed as a two-wire current interface based on a Pulse Width Modulation principle. Each zero crossing of the magnetic input signal triggers an output pulse indicated by IHigh and ILow current consumption. The PWM Protocol is available in two different protocol options: standard TLE5046iC-PWM and TLE5046iCPWME with indication of internal errors by using the warning pulse. The timing characteristic for TLE5046iC-PWM and TLE5046iC-PWME is given in the table below: Figure 3 Signal output pulse The timing characteristic for TLE5046iC-PWM and TLE5046iC-PWME is given in the table below: Table 5 Parameter Symbol Min. Typ. Max. Unit Note / Test Condition Pre-low length tpre-low 38 45 52 s Length of Warning pulse tWarning 38 45 52 s Length of DR-L pulse tDR-L 76 90 104 s Length of DR-R pulse tDR-R 153 180 207 s Length of DR-L & EL pulse tDR-L&EL 306 360 414 s Length of DR-R & EL pulse tDR-R&EL 616 720 828 s Output of EL pulse, maximum frequency fELmax - 117 - Hz Length of stand still pulse tStop 1.232 1.4 1.656 ms Stand still period TStop 105 150 195 ms BEL BEL 345 mT 4*Blimit BWarning BWarning 160 mT 2*Blimit Technical Product Description 7 Revision 1.0 2018-11-06 TLE5046iC Technical product description 4 AK Protocol 4 AK Protocol TLE5046iC-AK-LR and TLE5046iC-AK-ERR devices are compliant with: "Requirement Specifications for Standardized Interface for Wheel Speed Sensors with Additional Information `AK-Protocol' Version: 4.0" dated 13.02.2008 of Daimler AG, unless otherwise stated in this document or in the valid Technical Datasheets. The following illustration defines the meaning of the data protocol. The bits 0 - 8 in the illustration are designated as the data protocol and their purpose is to transfer additional information to the speed pulse. Bit position #0 can be used as an indication for air gap reserve (LR), or can be interpreted by the ECU as an "error bit" and treated in a special way (ERR). The two different variants TLE5046iC-AK-LR and TLE5046iC-AKERR, respectively, perform accordingly. Figure 4 Data protocol 5 Safety Mechanisms The TLE5046iC offers safety features to support the Automotive Safety Integrity Level ASIL B and is designed to be used in ASIL D systems. An embedded safety concept was developed to notify the Control System in case of an internal error by setting the output current level to a constant failure indication level IError. An embedded safety concept was developed to minimize the effect of hard and soft random errors by the introduction of specific safety mechanisms. In case of an internal error a notification to the ECU is transmitted by either setting the output current level to a constant failure indication level IError or transmitting an error flag via the protocol. Following safety mechanisms have been implemented: * Undervoltage detection: This safety mechanism detects voltage drops to values where the correct functionality of the circuitry is no more ensured. The sensor remains in this state until the error condition is solved and VDD is back into normal operating range. * Detection of discrepancy between number of active fuses and internally stored number of fuses: This safety mechanism compares the active fuse bits against the internal stored quantity. The sensor remains in this failure indication state IError until the device is powered off and on again and the error condition is not present any longer. * Detection of clock malfunction: This safety mechanism forces the failure indication state if the clock is either stuck or below 25% of the nominal value * Detection of different numbers between speed and direction path: This safety mechanism verifies if more than two consecutive electric events are generated without any detected event in the direction path or vice versa * Detection of critical air gap, ADC clipping and temperature monitoring: This safety mechanisms verifies critical states inside the ASIC itself. Technical Product Description 8 Revision 1.0 2018-11-06 TLE5046iC Technical product description 6 ESD and EMC Characteristics The full overview including detailed descriptions of the functionality of each safety mechanism and the detailed failure reaction can be found in the Safety Manual. The entirety of Infineon experience has been used to identify and prevent common cause of failure in the application including EMC disturbances and mechanical tolerances. An advanced EMC concept, inclusive of microbreak feature, without the need of external components, maximizes the availability of the sensor signal at the electrical interface. Also, the speed algorithm is designed for fast start-up and optimization of duty cycle. The extremely low jitter of the sensor contributes to high time accuracy of the speed signal. TLE5046iC is accompanied by accurate safety analysis and complete documentation to enable the system integrator to quickly evaluate the compatibility with the system/item and start the integration process. A detailed description of how the sensor is to be used in an ISO26262 compliant system can be found in the Safety Manual and Safety Analysis Summary Report, which are available on request. 6 ESD and EMC Characteristics The TLE5046iC is characterized according to the IC level EMC requirements described in the "Generic IC EMC Test Specification" Version 2.0 from 2014. EMC testreport is available on request. Additionally component level EMC characterizations are performed according to ISO 7637-2:2011, ISO 7637-3:2007 and ISO 16750-2:2010 regarding pulse immunity, and CISPR 25 (2009-01) Ed. 3.0 regarding conducted emissions. 7 ESD HBM Model Table 6 Parameter Symbol Min. Typ. Max. Unit Note / Test Condition ESD Voltage VHBM - - 12 kV Method AEC-Q100 Rev H (1.5 k, 100 pF) 8 Product Qualification Product qualification according to AEC-Q100 Grade 0 is performed. Technical Product Description 9 Revision 1.0 2018-11-06 TLE5046iC Technical product description 9 Pin Configuration 9 Pin Configuration Table 7 Pin No. Symbol Function 1 VDD Supply voltage 2 GND Ground Figure 5 Pin configuration Technical Product Description 10 Revision 1.0 2018-11-06 TLE5046iC Technical product description 10 Package Outline 10 Package Outline Figure 6 Package Outline Technical Product Description 11 Revision 1.0 2018-11-06 TLE5046iC Technical product description 11 Terminology 11 Terminology Table 8 s microsecond T micro-Tesla A Ampere AEC Automotive Electronics Council AK Arbeitskreis ASIC application specific integrated circuit ASIL automotive safety integrity Level C Celsius CISP Comite international special des perturbations radioelectriques EMC electromagnetic compatibility ESD electrostatic discharge GMR giant magneto resistance GND ground h hour HBM human body model Hz Hertz IC integrated circuit iGMR integrated giant magneto resistance ISO International Organization for Standardization iTPMS integrated tire pressure monitoring system k kilo-Ohm kV kilo-Volt mA milli-Ampere min minute mm millimeter ms millisecond mT milli-Tesla Ohm pF picofarad PWM pulse width modulation V Volt VDD supply voltage Technical Product Description 12 Revision 1.0 2018-11-06 TLE5046iC Technical product description Revision history Revision history Document version Date of release Description of changes 1.0 2018-11-06 * Technical Product Description Initial version 13 Revision 1.0 2018-11-06 Trademarks All referenced product or service names and trademarks are the property of their respective owners. Edition 2018-11-06 Published by Infineon Technologies AG 81726 Munich, Germany (c) 2018 Infineon Technologies AG All Rights Reserved. Do you have a question about any aspect of this document? Email: erratum@infineon.com Document reference IFX-lbs1538409505925 IMPORTANT NOTICE The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics ("Beschaffenheitsgarantie") . With respect to any examples, hints or any typical values stated herein and/or any information regarding the application of the product, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party. 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