TLE4963-2M datasheet(15/91 Pages) INFINEON

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EPS rotor position sensors

The motor, that drives the steering rack in an EPS system

is usually a highly efficient brushless DC (BLDC) motor,

which relies on a fast and accurate position sensor for

commutation. In this application, short latency and high

A correct commutation of the EPS motor has to be ensured,

in order to avoid a blocked steering or the erratic steering

support. This application is also classified in the category

of ASIL D. To achieve this high level of functional safety,

Infineon offers angle sensors in the dual-sensor package

that allow the integration of two redundant sensors in the

place of one.

The TLE5309D, in particular, meets the highest functional

safety requirements by using a combination of AMR

(Anisotropic-Magneto-Resistance) and GMR (Giant-Magne-

to-Resistance) technology, which not just offers redundan-

accuracy are essential, as these sensor parameters have

a significant impact on torque stability and the energy

efficiency of the motor.

cy, but also integrated diversity in a single product.

Depending on the overall EPS system architecture, the mo-

tor position sensor can be directly mounted on the steering

ECU, or connected via a cable in a satellite configuration.

The very high level of sensor accuracy required for highest

energy efficiency, comparable to the performance of costly

resolver solutions, is typically achieved by implementing a

continuous calibration algorithm on the steering ECU. By

monitoring the sensors output signals and calculating the

compensation parameters during operation, this algorithm

compensates any drift that occur over temperature and

lifetime.

Schematic of BLDC motor with a magnetic position sensor for commutation

TLE5009A16(D)

Fast dual-GMR angle sensor with analog sin/cos output.

Available in a 16-pin dual-sensor SMD package.

TLE5109A16(D)

Fast dual-AMR angle sensor with analog sin/cos output.

Available in a 16-pin dual-sensor SMD package.

TLE5309D

Combined AMR and GMR sensor for integrated diversity, featuring fast analog

sin/cos output. Available in a 16-pin dual-sensor SMD package.

TLE5012BD

Digital GMR angle sensor with SPI + incremental encoder interface or Hall switch

emulation output. Available in a 16-pin dual-sensor SMD package.

EC-Motor

Sensor

Magnet

Motor

control unit

Sensors in

Electric Power Steering (EPS)

TLE4963-2M Datasheet(PDF) 15 Page - Infineon Technologies AG

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