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Product Highlights

MPS Integrated Current Sensors (MT)

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MPS Integrated Current Sensors

MPS Integrated Current Sensor intro (MM)

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MPS current sensors integrate galvanic isolation, high-voltage continuous operation, and high-current sensing into a small, industry-standard SOIC-8 package. Their current sensors utilize an array of differential, linear Hall sensors that pick up the target induced magnetic field from the primary conductor while rejecting unwanted stray fields. This makes MPS's current sensors ideal for use in magnetically noisy environments. In addition, the low resistance of the integrated conductor results in improved efficiency and reduced power loss compared to a traditional shunt resistor solution. The low-resistance primary conductor allows current to flow near the sensor IC. The current generates a magnetic field, which is sensed at two different points by the integrated Hall sensors. The magnetic field difference between these two points is converted into a ratiometric voltage proportional to the applied current (see Figure 1). MPS’s unique spinning current technique provides a low offset that remains stable across a wide temperature range.

The primary conducting leads are electrically isolated from the sensor leads on the secondary side, producing a sensor with a high isolation voltage and working voltage (see Figure 2). This makes our current sensors ideal for high-side current sensing without the need for expensive, large-footprint optical or inductive isolation alternatives.

MPS Integrated Current Sensor figures (LC)

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Graph: output voltage proportional to primary current
Figure 1: Output voltage proportional to primary current
Block diagram: high-voltage isolation in standard SOIC package
Figure 2: High-voltage isolation in standard SOIC package

Advantages of MPS Current Sensors

  • Complete Isolated Current Sensor in a Small SOIC-8 (5mmx6.2mm) Package
  • Single IC Is Simple and Cost-Effective to Design In
  • Smallest Solution Footprint
  • Wide Current-Sensing Range from ±5A to ±50A, AC or DC
  • Low Conductor Resistance for Low Power Loss: 0.9mΩ
  • ±2.5% Accuracy over Temp, Factory-Trimmed
  • Immune to Stray Magnetic Fields via Differential Sensing
  • No Magnetic Hysteresis

 

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Product Highlights

  • MCS1806
  • MCS1823
  • MCS1805

MCS1806

3kVRMS Isolated Hall-Effect Current Sensor with 500VRMS Working Voltage, ±2.5% Accuracy

The MCS1806 is a linear Hall-effect current sensor for AC or DC current sensing. The Hall array is differential, which cancels out any stray magnetic field.

A primary conductor with a low resistance allows the current to flow close to the IC, which contains high-accuracy Hall-effect sensors. This current generates a magnetic field that is sensed at two different points by the integrated Hall-effect transducers. The magnetic field difference between these two points is then converted into a voltage that is proportional to the applied current. A spinning current technique is used for a low, stable offset.

The galvanic isolation between the pins of the primary conductive path and the sensor leads allows the MCS1806 to replace optoisolators and other isolation devices.

The MCS1806 requires a minimal number of readily available, standard external components. The device’s small SOIC-8 footprint saves board area and makes it well-suited for space-constrained applications.

MPS MCS1806 sensor in SOIC-8 package

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Features & benefits

  • 3.3V or 5V Single-Supply Options
  • Immune to External Magnetic Fields via Differential Sensing
  • 3kVRMS Minimum Isolation Voltage
  • 500VRMS Maximum Working Voltage
  • ±2.5% Total Accuracy
  • 0.9mΩ Internal Conductor Resistance
  • ±5A to ±50A Bidirectional Range
  • Adjustable Bandwidth Up to 100kHz
  • Ratiometric Output from Supply Voltage
  • Output Proportional to the AC or DC Currents
  • Factory-Trimmed for Accuracy
  • No Magnetic Hysteresis
  • Available in an SOIC-8 Package

MCS1823

Linear Hall-Effect Current Sensor with Over-Current Detection in an Ultra-Small Package

The MCS1823 is a linear Hall-effect current sensor IC for AC or DC current sensing. The Hall array is differential to cancel out any stray magnetic field.

A low-resistance (0.6mΩ) primary conductor allows a large current to flow within close proximity to the integrated circuit containing high-accuracy Hall sensors. This current generates a magnetic field which is sensed at two different points by the integrated Hall transducers. The magnetic field difference between these two points is then converted into a voltage that is proportional to the applied current. A spinning current technique is used for a low, stable offset.

The MCS1823 implements over-current detection (OCD) to easily monitor the system for over-current faults.

The MCS1823’s small footprint saves board area and makes it well-suited for space-constrained applications. The MCS1823 is available in an ultra-small QFN-12 (3mmx3mm) package.

MPS MCS1823 in QFN012 package - top side of the sensor

Features & benefits

  • 3V or 5V Single Supply (Optional)
  • Immune to External Magnetic Fields by Differential Sensing
  • 6mΩ Internal Conductor Resistance
  • ±2.5% Total Accuracy
  • 5A to 50A Range (See Ordering Information)
  • 120kHz Bandwidth
  • Over-Current Detection (OCD) with 1μs Response Time
  • Output Proportional to AC or DC Currents
  • Ratiometric or Absolute Output from Supply Voltage (Optional)
  • Factory-Trimmed for Accuracy
  • No Magnetic Hysteresis
  • Custom OCD Level from 50% to 240% of IPMAX
  • Available in a QFN-12 (3mmx3mm) Package

MCS1805

Linear Hall-Effect Current Sensor with OCD, 3kVRMS Isolation, and 580VRMS Working Voltage

The MCS1805 is a linear Hall-effect current sensor IC for AC or DC current sensing. The differential Hall array cancels out any stray magnetic field.

The primary conductor’s low resistance allows large currents to flow within close proximity to the integrated circuit, which contains high-accuracy Hall sensors. This current generates a magnetic field, which is sensed at two different points by the integrated Hall transducers. The magnetic field difference between these two points is then converted into a voltage that is proportional to the applied current. A spinning current technique is used for a low, stable offset.

The galvanic isolation between the pins of the primary conductive path and the sensor leads allow the MCS1805 to replace optoisolators or other isolation devices.

The MCS1805 integrates fast over-current detection (OCD), which makes it simple to monitor the system for over-current (OC) events.

The MCS1805 requires a minimal number of external components. The device’s small footprint saves board area and makes it well-suited for space-constrained applications. It is available in an SOIC-8 package.

MPS MCS1805 linear current sensor

Features & benefits

  • 3.3V or 5V Single Supply Options
  • Immune to External Gradient Magnetic Fields by Differential Sensing
  • Extreme Low-Noise Density
  • 3kVRMS Minimum Isolation Voltage
  • 580VRMS Maximum Working Voltage
  • ±2.5% Total Accuracy
  • 5A to 50A Bidirectional or Unidirectional Range
  • 120kHz Bandwidth
  • Custom Over-Current Detection (OCD) from 50% to 240% of the Rated Current (IPMAX)
  • Fast OCD with 1μs Response Time
  • Output Voltage (VOUT) Proportional to AC or DC Currents
  • Ratiometric VOUT from Supply Voltage
  • Factory-Trimmed for Accuracy
  • Available in an SOIC-8 Package

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