Features and Benefits

▪ Factory trimmed AC and DC current sensor

▪ Analog ratiometric or fixed output voltage

▪ Combining sensing element, signal

conditioning & isolation in SOIC package

▪ No application programming required

▪ High speed sensing

▪ DC to 300kHz bandwidth

▪ 2μs response time

▪ Robust against external magnetic fields

▪ No magnetic hysteresis

▪ Double overcurrent detection (SOIC-16)

▪ Low ohmic losses of integrated conductor

▪ 1.09mΩ SOIC-8 / 0.89mΩ SOIC-16

▪ SOIC-8 narrow body and SOIC-16 wide

body package, RoHS compliant

▪ Lead free component, suitable for lead

free soldering profile up to 260°C, MSL3

▪ Rated voltage isolation

▪ 2.4kVRMS for SOIC-8

▪ 4.8kVRMS for SOIC-16

Applications

▪ AC and DC Chargers

▪ Electric Drives

▪ DCDC converters

▪ Solar

▪ Power Supplies

▪ Demand/Load control

Description

The MLX91221 is an Integrated Current Sensor that

senses the current flowing through the low

impedance leadframe of the SOIC package. By

virtue of fixing the current conductor position with

respect to the monolithic CMOS sensor, a fully

integrated Hall-effect current sensor is obtained,

that is factory calibrated.

Inside the package, the magnetic flux density

generated by the current flow is sensed

differentially by two sets of Hall plates. As a result

the influence of external disturbing fields is

minimized in the fast analog front-end. The

residual signal is amplified to provide a high-speed

linear analog output voltage.

The close proximity of the Hall plates to the current

conductor ensures a high signal-to-noise ratio and

an accurate signal over temperature. With this

miniaturization, high voltage isolation ratings are

still maintained between the primary and their

opposing secondary side leads of the package.