New Melexis 3D magnetic resolver IC is optimized for robust motor design: smallest footprint, programmable at module level, cost-effective and ASIL-ready

时间： 2022-07-06 来源：MELEXIS

技术问答

Tessenderlo, Belgium, 30 June 2022 – MELEXIS reveals the MLX90381 AEC-Q100/ISO 26262 compliant pico-resolver, delivering ease of use and reliability to industrial and automotive applications. Its tiny DFN-6 (2 mm x 2.5 mm) package enables sensored mechatronic miniaturization. This ASIL-ready solution is programmable at module level and is best suited to rotor position detection.

MELEXIS, a global microelectronics engineering company, introduces the MLX90381 3D magnetic pico-resolver. This device combines the advantages of a small outline and reliable analog outputs providing sine and cosine signals.

Leveraging Melexis’ unique Triaxis® Hall technology, the MLX90381 is easy to use in rotor position detection. The MLX90381 can be used for absolute rotary position sensing and, leveraging its low latency and fast response, measures rotational speeds of more than 50,000 rpm.

The pico-resolver improves the low-speed accuracy, noise performance and supporting stall detection. It can be used with DC, brushless DC (BLDC) and permanent magnet synchronous motors (PMSM) in applications such as e-valves and e-bike motors.

It is also a good fit for automotive safety-related systems as it is AEC-Q100 and ISO 26262 compliant (ASIL B SEooC).

The MLX90381 combines easily with Melexis’ family of smart embedded LIN drivers. These include the MLX81330/32 (up to 10 W) for directly driving flaps, valves, and single-coil fans and pumps. Additionally, it works with the MLX81340/MLX81344/MLX81346 pre-drivers (up to 2000 W) which are incorporated into power blowers, engine cooling fans, pumps, window lifters, seat adjusters and sunroofs.

Thanks to its selectable magnetic field axes (X/Y - X/Z - Z/Y), the MLX90381 can handle on-axis position sensing as well as off-axis through-shaft sensing. The sensitivity of each axis and the filter bandwidth can be programmed directly through the device’s I²C interface. A dedicated high sensitivity version of the pico-resolver allows additional robustness against external magnetic stray fields.

The MLX90381 is housed in a compact DFN-6 package. It requires only three external capacitors to complete the circuit.

“The MLX90381 pico-resolver IC is our most versatile and safe resolver with the smallest footprint available on the market,” says Dieter Verstreken, Global Marketing Manager Position Sensors at Melexis. “When combining it with our family of LIN motor drivers, the result is a convenient Sense & Drive solution for actuation and position sensing. This helps our customers tackle a wide variety of challenges like miniaturization, safety and programmability.”

The MLX90381 is available for order.

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本文由翊翊所思转载自MELEXIS，原文标题为:Beyond small, the world’s first pico-resolver，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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