Melexis expands IMC-Hall® current sensor portfolio exceeding measurement

Melexis expands IMC-Hall® current sensor portfolio exceeding measurement

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Melexis, a global microelectronics engineering company, has introduced the MLX91216 XHF extra high-field current sensor, extending the ease and accuracy of its unique 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. What differentiates the proven IMC-Hall® technology from coreless solutions is that 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. On the other hand, IMC-Hall® technology 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

Available now, the MLX91216 XHF is AEC-Q100 Grade-0 qualified for automotive applications and operates over the temperature range -40 °C to +150 °C. The sensor has a wide measurement range from ±20 mT to ±350 mT with linearity down to ±0.2% full scale, 2 μs response time, and high thermal stability with offset drift below 5 mV and sensitivity drift within 1%.

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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