Summary of MELEXIS EXPANDS IMC-HALL® CURRENT SENSOR PORTFOLIO EXCEEDING MEASUREMENT
The MLX91216 XHF is a high-field current sensor by Melexis utilizing IMC-Hall® technology to measure currents exceeding 2000 A. It targets automotive applications like battery management, smart fuses, and traction inverters. Key features include user-programmable filtering, built-in diagnostics for broken-wire detection, and an SOIC8 surface-mount package. The patented Integrated Magnetic Concentrator allows for less critical positioning compared to coreless solutions, simplifying assembly and avoiding complex busbar machining while maintaining small form factors.
Parts used in the MLX91216 XHF Current Sensor:
- MLX91216 XHF sensor
- Integrated Magnetic Concentrator (IMC)
- SOIC8 surface-mount device package
- U-shape magnetic shield
- Battery-management system (BMS) monitoring module
- Smart fuse over-current detection unit
- Traction inverter phase current measurement circuit
- Boost/recuperation inverter measurement interface
- Broken-wire detection diagnostic system
- User-programmable filtering configuration
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.
Read more: MELEXIS EXPANDS IMC-HALL® CURRENT SENSOR PORTFOLIO EXCEEDING MEASUREMENT
- What is the maximum current measurement capability of the MLX91216?
The sensor is capable of measuring current to beyond 2000 A. - How does the IMC-Hall technology differ from coreless solutions regarding positioning?
Position is much less critical because the measurement is not dependent on a magnetic field gradient. - Can users adjust the signal-to-noise ratio of the sensor?
Yes, user-programmable filtering allows adjustment of resolution, response time, and bandwidth. - What specific diagnostic feature is included in the sensor?
The sensor features built-in diagnostics including broken-wire detection. - What type of package does the MLX91216 use?
It uses an SOIC8 surface-mount device package. - How does this sensor simplify assembly compared to conventional Hall sensors?
It allows easier assembly by being positioned over the busbar within a simple U-shape magnetic shield. - Does the design require severe bus bar machining?
No, other technologies can cause severe machining, but this design avoids that issue. - What automotive applications is this sensor suited for?
It is suited for redundant monitoring of BMS, smart fuses, and measuring phase currents in inverters.
