Expanded portfolio of high-speed inductive resolver ICs

Melexis expands its range of automotive-qualified inductive resolvers for e-motor applications (brake booster, power steering, traction motor). The MLX90517 complements the MLX90510 by offering raw signals to provide off-chip compensation in the ECU.

The device adds to its range of inductive resolver ICs. An external compensation algorithm ensures accuracy of better than ±0.36-degrees at up to 660,000e-rpm with no need for any IC programming.

The device works together with a set of PCB-based coils. Arrangements can be readily adapted in line with the number of pole-pairs of the motor. Support for on-axis (end-of-shaft) and off-axis (side-of-shaft or through-shaft) sensing offers engineers options to implement coils for reliable and accurate sensing within acute mechanical constraints. The three-phase-based coil design enhances linearity through harmonic filtering that would not be possible in two-coil systems.

“The MLX90510 and MLX90517 bring engineers the freedom to choose between on-chip and off-chip compensation,” states Lorenzo Lugani, product manager Inductive Sensors at Melexis.

The device has been developed as an ASIL C SEooC in accordance with ISO 26262. It supports up to ASIL D system integration. Built-in overvoltage and reverse-polarity protection (±24V on the supply and ±18V on the outputs) enable it to withstand the most challenging electrical environments. It is AEC-Q100 qualified and has a -40C to +160C operational temperature range. This device is provided in a TSSOP-16 package.