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Melexis expands IMC-Hall current sensor portfolio

Melexis has introduced the MLX91216 XHF extra high-field current sensor, extending its IMC-Hall technology into high-current measurement for emerging automotive applications.

Capable of measuring current to beyond 2000 A, the MLX91216 XHF is suited to redundant monitoring of battery-management systems (BMS), over-current detection in smart fuses, and measuring phase currents in traction inverters and boost/recuperation inverters.

With user-programmable filtering to adjust resolution, response time, and bandwidth for optimum signal-to-noise ratio, the sensor features built-in diagnostics, including broken-wire detection.

The SOIC8 surface-mount device contains Melexis’ patented Integrated Magnetic Concentrator (IMC) that enables accurate contact-free measurement of busbar current in combination with a simple U-shape magnetic shield. When mounted on a PCB, the sensor is positioned over the busbar, within the shield, allowing easier assembly than conventional Hall sensors.

When it comes to IMC-Hall technology, compared to coreless solutions, position is much less critical. The design can accept more mechanical movement because the measurement is not dependent on a magnetic field gradient. Other technologies that are can result in very severe bus bar machining causing important thermal hot spots.

However, IMC-Hall technology also carries the advantages of coreless technologies, so it lends itself to smaller assemblies with surface mount package solutions. This avoids the use of more complex through-hole packages that often require specific lead bending/forming native to core based solutions.



The MLX91216 XHF extends the family of Melexis IMC-Hall sensors that provide accurate, high-speed current measurement for a wide range of automotive and industrial applications.



  • MLX91216 High field (HF) versions: 200 to 600 A
  • MLX91216 Very High Field (VHF) versions: 400 to 1200 A
  • MLX91216 eXtra High Field (XHF) versions: 800 to 2000 A

Author
Neil Tyler

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http://www.melexis.com

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Melexis

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