The MLX91220 is a 0-50 A isolated integrated hall effect current-sensor with dual OCD, operating on a 5V supply.

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Top features

  • Factory trimmed AC and DC current sensor

  • Analog ratiometric or fixed output voltage

  • Combining sensing element, signal conditioning & isolation in a miniature surface mount package

  • High speed sensing

    • DC to 300 kHz bandwidth

    • 2μs response time

  • High common mode field rejection through differential sensing

  • No magnetic hysteresis

  • Double overcurrent detection (SOIC-16)

  • RoHS compliant packages

    • SOIC-8 narrow body

    • SOIC-16 wide

  • Low ohmic losses of integrated conductor

    • 0.9mΩ SOIC-8

    • 0.75mΩ SOIC-16

  • Lead free component, suitable for lead free soldering profile up to 260°C, MSL3

  • Rated voltage isolation as per IEC/UL 62368-1:2014 (2nd edition)

    • 2.4kVRMS for SOIC-8

    • 4.8kVRMS for SOIC-16

  • AEC-Q100 automotive qualified

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0-50 A isolated 5 V integrated Hall current sensor - MLX91220

Product description

The MLX91220 is a 0-50 A isolated integrated hall effect current-sensor with dual OCD, operating on a 5V supply. It is the easiest all-in-one integrated current sensor with the right balance of small footprint, low impedance, high bandwidth, isolation and more general features.

MLX91220 MLX91221 Block Diagram

The MLX91220 is an integrated current Sensor that senses the current flowing through the leadframe of the package and therefore minimizes the thermal losses encountered with more standard solutions.

 

 

 

 

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 originating from the dense power electronics surrounding the IC is minimized. 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.

The current sensors can operate in two measurement modes:

  • ratiometric mode, addressing the applications mandating output voltage scaling to the supply
  • fixed mode (differential), addressing the use of a reference voltage

Among all the new features integrated, the (dual) overcurrent detection on-chip with a separated output reduced the BoM by reducing the need for external comparators for overcurrent protection.

Factory trimmed (mV/A), the MLX91220 is a plug & play solution. No EoL (End of Line) is required.

MLX91220: operate on a 5 V supply
MLX91221: operate on a 3.3 V supply

A development kit DVK91220 is available, allowing the first application tests without having to customize a PCB.

Features and benefits

  • Factory trimmed AC and DC current sensor

  • Analog ratiometric or fixed output voltage

  • Combining sensing element, signal conditioning & isolation in a miniature surface mount package

  • High speed sensing

    • DC to 300 kHz bandwidth

    • 2μs response time

  • High common mode field rejection through differential sensing

  • No magnetic hysteresis

  • Double overcurrent detection (SOIC-16)

  • RoHS compliant packages

    • SOIC-8 narrow body

    • SOIC-16 wide

  • Low ohmic losses of integrated conductor

    • 0.9mΩ SOIC-8

    • 0.75mΩ SOIC-16

  • Lead free component, suitable for lead free soldering profile up to 260°C, MSL3

  • Rated voltage isolation as per IEC/UL 62368-1:2014 (2nd edition)

    • 2.4kVRMS for SOIC-8

    • 4.8kVRMS for SOIC-16

  • AEC-Q100 automotive qualified

Videos

Isolated integrated current sensor IC MLX91220/21

Product

The second generation of isolated integrated current sensors MLX91220 (5 V) and MLX91221 (3.3 V) are Hall-effect based current sensors that are qualified for use in a range of automotive and industrial applications, such as on-board chargers (OBC), DC/DC converters, power supplies, and small electric drives. With 300 kHz bandwidth, they suit a variety of power conversion applications lower than 50 A RMS.

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