Melexis MLX91218 Extra High Field IMC-Hall® Current Sensor

Melexis MLX91218 Extra High Field IMC-Hall^® Current Sensor Integrated Circuit (IC) is a high-speed, high-accuracy, monolithic sensor with dual overcurrent detection (OCD) functionality, a 3.3V to 5V supply, and an improved SNR. The IMC-Hall technology uses a flexible U-shield for crosstalk immunity and measures currents from 200A to 2000A. This AxX-version sensor provides an analog output voltage proportional to the applied magnetic flux density parallel to the IC surface. A factory-trimmed overtemperature transfer characteristic is programmable (offset, sensitivity, filtering, internal overcurrent threshold) during end-of-line user calibration. The MLX91218 from Melexis includes a second OCD in a SOIC-8 package. The on-chip overcurrent detection reports OCD events with active low open-drain output and can be set within or outside the linear sensing range. The 400kHz bandwidth and fast response time allow adaptation to high-speed applications such as motor control, inverters, and converters.

Features

Designed for higher current applications
Dual overcurrent detection
- Internal threshold
- External threshold
5V mode and 3.3V mode flexible supply voltage (factory selectable)
Ratiometric or fixed selectable analog output (V_ref)
High speed
- DC to 400kHz bandwidth
- 2µs response time
Measurement range for current from 200A to 2000A
Low noise

IMC-Hall technology
- Smaller, lighter solution than conventional Hall solutions.
- Easy mechanical integration
- Vertical stacking possible with existing control boards (PCBs)
End-of-line programmable sensor
High linearity down to ±0.5% full scale
Ultra-low thermal drift for wide temperature range
- <5mV offset drift
- <1.5% sensitivity drift
RoHS-compliant SOIC-8 (DC) package, MSL 3
AEC-Q100 Grade 0 automotive qualified

Applications

Smart battery junction boxes
Smart fuse overcurrent detection
High voltage traction inverters (HV)
- Phase current measurement
- DC-link current measurement

Redundant monitoring of battery-management system (BMS)
DC-DC converters
48V boost-recuperation inverters
- Phase current measurement
- DC-link current measurement