Self-Calibrating Digital Angle Sensors for Motor Control Applications

Infineon Technologies AG is releasing the TLx49012 family of digital angle sensors based on Hall-effect technology. The hardware is designed to deliver high-accuracy rotor position feedback for high-speed brushless DC (BLDC) motors utilized in automotive systems and industrial automation.

System-Level Calibration and Mounting Flexibility
The hardware incorporates an automatic system self-calibration function designed to streamline the integration process. This feature eliminates the requirement for external reference encoders and custom calibration routines during the manufacturing phase, specifically reducing end-of-line testing overhead. The integration of continuous on-chip compensation mechanisms allows engineers to mount the sensors in both on-axis and off-axis configurations, providing architectural flexibility without introducing additional system complexity.

Performance Metrics and Interface Integration
For highly dynamic motor systems, minimizing signal delay is a primary constraint. The sensors operate with an ultra-low latency of 1.5 microseconds and achieve an angular accuracy margin of less than 0.1 degrees. The components are compatible with standard magnet configurations, supporting a magnetic field range between 20 millitesla (mT) and 120 mT. To interface with existing motor controller architectures, the sensors support multiple data transmission protocols, including Serial Peripheral Interface (SPI), ABZ, UVW, and Pulse Width Modulation (PWM).

Automotive Safety and Application Scope
The scaling of robotics and the electrification of automotive drivetrains drive the deployment of advanced BLDC motors. To support these critical deployments, the automotive-qualified variants within the family, designated as TLE49012, comply with ISO 26262 functional safety standards. These specific variants achieve an Automotive Safety Integrity Level B (ASIL B) classification, verifying their suitability for safety-critical motor control systems in modern vehicle platforms.

Additional Context
This section details technical specifications and competitive benchmarking not included in the original news release.

In the automotive and industrial magnetic angle sensor market, Infineon competes directly with manufacturers such as Melexis, Allegro MicroSystems, and ams OSRAM. For high-speed BLDC motor control, latency and angular accuracy are the primary performance benchmarks. The 1.5-microsecond latency of the TLx49012 series positions it competitively against alternatives like the ams OSRAM AS5147 series, which typically operates with propagation delays approaching 1.9 microseconds.

Regarding functional safety, the ASIL B rating of the TLE49012 variants is sufficient for many auxiliary automotive motor applications, such as fluid pumps and HVAC blowers. However, for primary safety-critical systems like electronic power steering (EPS) or advanced driver-assistance systems (ADAS) braking, competitors such as Allegro MicroSystems offer singular sensors with native ASIL D compliance, a higher safety certification tier that sensor manufacturers typically address through dual-die or redundant sensor configurations.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

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