Dual latch and switch is most versatile yet, says Melexis
The MLX92352 is a universal programmable three-axis latch and switch for relative position and speed sensing. It provides magnetic flexibility and pitch independent dual outputs that can be set as speed, pulse or direction. Melexis claimed the PCB-less device has unmatched EMC and ESD performance and saves space and total module cost for automotive and industrial applications.
The MLX92351 (pre-programmed) and MLX92352 (programmable) are quadrature output devices, which determine rotational speed and direction in motor systems. The 90 degree phase shift between the two outputs provides pitch and air gap independence to simplify magnetic design, said the company.
The two latch and switch devices add extra flexibility by outputting any two-fold combination of X, Y and Z magnetic axes in the form of speed, pulse, or direction. Customers can set independent magnetic thresholds from ±0.5 to ±40mT.
Melexis said its silicon on insulator (SoI) technology enables 15kV HBM ESD, 8kV system ESD and EMC robustness.
The MLX92352 and MLX92351 operate from 2.7 up to 60V at a junction temperature of 175 degrees C. The last-state feedback function at start-up makes sure the motor system never misses a turn.
The EEPROM programmability and the ability to set any of the three axes to any output independently provides a flexibility for linear speed and direction control (power liftgate, power module closures), incremental rotary encoding (for example a cadence sensor for e-bikes, fan and pump motor indexing), dual linear position detection (piston and levers) and angular position detection (knobs, jog wheel).
The MLX92351 is supplied pre-programmed, while the MLX92352 offers end of line (EoL) programmability to compensate for modules’ mechanical tolerances in production. Both are offered in either VA package (PCB-less) or in an industry-standard TSOT package (SMD). An automotive version is AEC-Q100 qualified and supports ASIL system integration as per ISO 26262.
Samples and a development programming tool are available now.
