3

Speed Protocol

After minimum and maximum are detected and offset is compensated, output switching occurs at zerocrossing

of the differential magnetic signal.

t

t

t

Adaptive Hysteresis

=

Figure 3

Signal output pulse

4

Safety Mechanisms

The TLE5045iC 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

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

•

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

present any longer.

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.

TLE5045iC 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.

5

ESD and EMC Characteristics

The TLE5045iC 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.

TLE5045iC

Technical product description

3 Speed Protocol

Technical Product Description

7

Revision 1.0

2018-11-06