Tysondello, Belgium, April 1, 2020 – Melexis, a global microelectronics engineering company, announces the MLX91377, an ASIL compliant Hall-effect sensor IC for safety-critical automotive systems such as Electric Power Steering (EPAS) .
The MLX91377’s high linearity and excellent thermal stability (including low offset and low sensitivity drift) at ambient temperatures up to 160°C enables accurate and reliable torque sensing in EPAS systems for both normal driving and Safety control during unmanned driving.
The MLX91377 was developed as a Safety Standalone Unit (SEooC), ISO 26262 compliant and AEC Q-100 Class 0 certified. The MLX91377 is functional safety level ASIL-C (digital output mode (SENT or SPC)) and ASIL-B (analog output mode) compliant, each die provides a high level of functional safety to detect internal faults and enter a safe status to prevent unexpected vehicle behavior. The TSSOP-16 package extends this capability by providing a fully redundant dual die to support safety-critical applications such as steering and braking systems.
In addition to functional safety-critical applications, the MLX91377 meets the requirements of a range of automotive and industrial contactless position sensor applications, including steering torque sensors, accelerator pedal, brake pedal or clutch pedal sensors, absolute linear position sensors, float level sensors, non-contact Contact potentiometers, small angle position sensors and small travel position sensors.
Programmable measurement ranges and multi-point calibration provide engineers with greater flexibility, and various output protocols enable a single IC to be used in multiple applications, reducing repetitive qualification work and development costs. The Short PWM Code (SPC) protocol allows measurement and transmission when a trigger pulse is detected. As a result, up to four MLX91377 sensor ICs can be synchronized up to 2 kHz, enabling synchronous magnetic measurements with deterministic latency to ensure high accuracy. In addition, the low noise and high refresh rate support high control loop speeds, enabling the system to achieve fast response times while minimizing filtering.
The MLX91377 has a 48-bit programmable identification number and is available in a dual-die fully redundant TSSOP-16 package.