Automotive Chassis Ride Height and Active Suspension Systems

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AUTOMOTIVE CHASSIS RIDE HEIGHT AND ACTIVE SUSPENSION SYSTEMS The chassis ride height sensors give input to smart suspen- lowers the vehicle for better aerodynamics at high speed. On sion systems to change the way the suspension reacts to some four-wheel-drive vehicles, the suspension can be raised changing road conditions or load. On a rough road, it can for increased off-road ground clearance. provide a smoother ride. On some vehicles, the computer Ride height sensors Melexis solutions for ride height suspension systems The suspension ride height sensor is an electronic leveling to ensure correct height of the light beam to avoid device that measures the distance between the road blinding oncoming drivers and maintain good visiblity for the and a particular point on the vehicle's suspension, driver. For vehicles with active chassis control, it serves as an chassis or body. For vehicles without active chassis input to determine whether to fill or release air from the air control, the ride height sensor serves as an input into suspension and lower the vehicle for better aerodynamics at systems for stability control and those for headlamp high speed. Block diagram Load leveling Dynamic headlamp adjustment Break-over angle control Key features MAGNET MAGNET S N S N • PCB-less solutions capable of direct welding to the connector's lead frame SENSE SENSE • Easy to integrate and simple magnet design • Programmable saw tooth capable waveform. To air suspension control ECU • Robust to external stray fields (Gen. III) • Non-contacting solution • Multiple output types SENSE SENSE • ASIL ready S N S N MAGNET MAGNET SENSE&DRIVE 1, 2 or 4 sensors per car by Melexis www.melexis.com EDCMQ AUTOMOTIVE CHASSIS RIDE HEIGHT AND ACTIVE SUSPENSION SYSTEMS Suggested sensors 2-wire output (PSI5) 3-wire output Selection guide Triaxis® Hall Angle Magnetic Field Supply Current Temperature Supported Motion Output Format Package Safety Computation Strength (4) Voltage Consumption Option Product Rotary Rotary Joystick Ratiometric Min. Field DMP-4 E: K : L: G: ASIL Linear PWM SENT PSI-5 On-chip mT [G] (V) mA (Typical) SOIC-8 TSSOP-16 (2) On-Axis Off-Axis (3D) Analog (mT/mm) (no-PCB) (1) -40-85C -40-125C -40-150C -40-160C (ISO26262) 20-70 MLX90364 4.5-5.5 6 B [200-700] 20-70 MLX90365 4.5-5.5 6 B [200-700] 20-70 MLX90366 4.5-5.5 6 B [200-700] 20-70 MLX90367 4.5-5.5 6 B [200-700] 10-70 MLX90371 6 4.5-5.5 10 B [100-700] 10-70 4.5-5.5 (5) MLX90372 6 10 C [100-700] 6-18 10-70 4.1-6 MLX90373 6 11 C [100-700] 6-18 10-70 4.5-5.5 (5) MLX90374 dual 6 10 C [100-700] 6-18 10-70 4.5-5.5 (5) MLX90378 10 C [100-700] 6-18 More about our products and solutions Europe, Middle East and Africa [email protected] +32 13 67 04 95 Asia and Oceania [email protected] v1- 2020.05.14 +86 21 5820 6899 Americas [email protected] +1 248 306 5400 www.melexis.com EDCMQ.

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