MLX91221KDF-ABF-075-RE: Description, Features, and Applications

What is an MLX91221KDF-ABF-075-RE?

The MLX91221KDF-ABF-075-RE, developed by Melexis Technologies NV, is a high-precision Hall-effect current sensor designed for contactless current measurement across various applications, including automotive, consumer electronics, and industrial environments. This sensor uses integrated Hall-effect technology to detect magnetic fields generated by current flow, enabling precise current measurement without direct contact. It offers high sensitivity, making it capable of detecting even small currents accurately.

The device operates within a wide temperature range from -40°C to 150°C, ensuring reliability in harsh conditions. With a compact 3x3 mm QFN-16 package, it is designed for space-constrained applications and features low power consumption. Additionally, built-in temperature compensation ensures stable performance across varying temperatures.

MLX91221KDF-ABF-075-RE Pinout

Key Features of MLX91221KDF-ABF-075-RE

The MLX91221KDF-ABF-075-RE is a high-precision Hall-effect current sensor with several key features:

Sensing Capabilities

• Current Range: Can measure currents up to ±75A
• High Sensitivity: Offers a sensitivity of 20 mV/A for precise current measurements
• Wide Bandwidth: Operates from DC to 300 kHz, allowing for both AC and DC current sensing

Electrical Characteristics

• Supply Voltage: Operates at 3.3V
• Output Type: Provides a ratiometric analog voltage output
• Low Power Consumption: Designed for energy-efficient operation

Performance

• High Accuracy: Features low offset and high linearity for precise current measurements
• Wide Dynamic Range: Suitable for a broad range of current sensing applications
• Temperature Compensation: Built-in mechanisms ensure consistent performance across various temperatures

Environmental Resilience

• Wide Operating Temperature Range: Functions from -40°C to 125°C
• Robust Design: High resistance to mechanical stress and environmental factors

Package and Integration

• Compact Size: Housed in a 16-pin SOIC package, measuring 10.46 mm x 7.6 mm x 2.64 mm
• Automotive Grade: Qualified for automotive applications (AEC-Q100) with high-reliability requirements

MLX91221KDF-ABF-075-RE Specifications

Advantages of Using MLX91221KDF-ABF-075-RE

The MLX91221KDF-ABF-075-RE offers several key advantages that make it a valuable component for various applications:

Sensing Capabilities:

High Sensitivity: Can accurately detect even very small currents, enabling precise measurements in applications requiring high resolution.

Wide Current Range: Capable of measuring currents up to ±75A, providing versatility for different current sensing needs.

Broad Bandwidth: Operates from DC to 300 kHz, allowing for both AC and DC current sensing.

Performance:

High Accuracy: Features low offset and high linearity, ensuring precise current measurements crucial for applications requiring exact control.

Fast Response Time: Designed for high-speed operations, making it suitable for applications where rapid detection and reaction are essential.

Temperature Stability: Built-in temperature compensation ensures consistent performance across a wide range of temperatures (-40°C to 125°C).

Design and Integration:

Compact Size: Housed in a 16-pin SOIC package measuring 10.46 mm x 7.6 mm x 2.64 mm, allowing for easy integration into space-constrained designs.

Contactless Measurement: Uses Hall effect technology for non-intrusive current sensing without direct contact with the conductor.

Low Power Consumption: Energy-efficient design makes it suitable for battery-powered or low-power applications.

Robustness and Safety:

Wide Operating Temperature Range: Functions from -40°C to 125°C, making it suitable for harsh environments like automotive applications.

High Isolation: Offers 4.8kV isolation, making it suitable for high voltage isolation applications and enhancing safety.

Automotive Grade: Qualified to AEC-Q100 standards, ensuring high reliability for demanding automotive applications.

Versatility:

Multiple Applications: Suitable for use in automotive systems, industrial equipment, renewable energy systems, consumer electronics, and medical devices.

Ratiometric Output: Provides a ratiometric analog voltage output, ensuring consistent performance with supply voltage variations.

These advantages make the MLX91221KDF-ABF-075-RE an excellent choice for applications requiring precise, reliable, and efficient current measurement in various environmental conditions.

MLX91221KDF-ABF-075-RE Applications

The MLX91221KDF-ABF-075-RE is a versatile Hall-effect current sensor with applications across various industries:

Automotive Systems

• Battery Management: Monitors charge and discharge currents in electric vehicle battery systems.
• Motor Control: Used in electric power steering and other motor control circuits.
• Charging Systems: Monitors current in onboard chargers for electric vehicles.

Industrial Equipment

• Power Supplies: Provides current monitoring and overcurrent protection.
• Automation: Used in industrial automation systems for precise current measurement.
• Motor Control: Monitors currents in industrial motors for efficiency and predictive maintenance.

Energy Systems

• Solar Power: Employed in solar inverters for current measurement and system optimization.
• Smart Metering: Used in energy metering applications for accurate power consumption measurement.

Consumer Electronics

• Power Management: Ensures safe and efficient operation in devices like laptops and smartphones.
• Home Appliances: Improves functionality and reliability in various household devices.

Other Applications

• Medical Devices: Used in diagnostic equipment and patient monitoring systems.
• HVAC Systems: Controls motors and compressors for optimized energy use.
• Robotics: Monitors motor currents for efficient and safe operation.
• Aerospace: Provides reliable current sensing in aircraft systems.

The MLX91221KDF-ABF-075-RE's high accuracy, wide operating temperature range, and robust design make it suitable for these diverse applications where precise current measurement is critical.

Working Principle of MLX91221KDF-ABF-075-RE

The MLX91221KDF-ABF-075-RE operates based on the Hall effect principle to provide contactless current measurement. Here's an overview of its working principle:

Hall Effect Sensing

• When current flows through a conductor, it generates a magnetic field around it.
• The strength of this magnetic field is directly proportional to the magnitude of the current.
• The MLX91221KDF-ABF-075-RE's integrated Hall effect sensor detects this magnetic field without making physical contact with the conductor.

Signal Processing

• The Hall effect sensor generates a voltage corresponding to the strength of the detected magnetic field.
• This raw signal is then processed by the sensor's integrated electronics.
• The processing involves amplifying the Hall voltage and conditioning the signal to produce a stable output.

Output Generation

• The sensor produces an analog voltage output that is proportional to the measured current.
• This output is ratiometric, meaning it scales with the supply voltage, ensuring consistent performance across voltage variations.

Enhanced Accuracy

• The MLX91221KDF-ABF-075-RE incorporates a magnetic concentrator to direct the magnetic field toward the Hall element, enhancing sensitivity and accuracy.
• It features built-in temperature compensation mechanisms to maintain consistent performance across a wide temperature range (-40°C to 125°C).

Isolation

• The sensor provides electrical isolation between the measured current and the sensing circuit, making it suitable for high-voltage applications where direct electrical connection would be hazardous.
• This working principle allows the MLX91221KDF-ABF-075-RE to offer precise, non-intrusive current measurement with high sensitivity and accuracy, making it ideal for various applications in the automotive, industrial, and consumer electronics sectors.

MLX91221KDF-ABF-075-RE Equivalents

Based on the search results, here are some equivalent parts that can be considered alternatives to the MLX91221KDF-ABF-075-RE:

When considering these equivalents, it's important to take into account factors such as sensitivity, operating temperature range, supply voltage, and package type to ensure compatibility with the current design and match the specific application requirements.

MLX91221KDF-ABF-075-RE Datasheet

MLX91221KDF-ABF-075-RE Datasheet