Current Sensing made easy

CURRENT SENSING MADE EASY

MLX91210 - Integrated, Calibrated and Compact

For low to medium currents engineers have typically achieved the current sensing function with shunt resistors or current transformers. Shunt resistors require an additional amplifier making this a multi-component solution and due to the sensing principle of generating an intended voltage drop over a few milliohms series resistor, this results in relatively high thermal losses. For high accuracy either more expensive shunts are needed or an end of line calibration step is required. A current transformer on the other hand is more bulky, and is limited to sensing only AC signals.

To address these shortcomings, the MLX91210 offers a fully integrated and factory calibrated Hall-based solution which provides fast and accurate results. It combines the sensing element, signal conditioning and voltage isolation in a single SMD package.

Ideal for modern and compact applications, this "Plug and Power" concept does not need any additional components such as a shunt resistor or ferromagnetic core. The fast analog output is proportional to the AC or DC current flowing through the leadframe of the IC. No calibration is required in the application.

Inside the package, the magnetic flux density is sensed differentially by two sets of Hall plates giving excellent stray-field immunity. The close proximity of the Hall plates to the current conductor overcomes the absence of a ferromagnetic concentrator and the factory calibration ensures an accurate signal over temperature.

The small form factor of the surface mount sensors saves board space and cost, while maintaining basic isolation ratings as high as 2.5kVAC between the primary and secondary side package leads.

Features and Benefits
  • For currents up to 30ARMS and transients up to 75A and beyond
  • From DC to 100kHz, 5µs response time
  • Factory calibrated plug & power solution
  • Immune to external fields and cross-talk inherent to dense power electronics
  • Low electrical resistance: 0.7mΩ
  • Rated voltage isolation up to 2.5kVRMS
  • Operating temperature -40 to 125°C
Applications
  • Appliances, energy, industry
  • Power monitoring and metering
  • Motor current control, load detection
  • Inverters
  • Overcurrent detection

Plug & Power Portfolio*

* Custom option codes possible - minimum volumes apply.

Need to measure higher currents?

Conventional Hall

Sensing Technology

Hall Effect

Mounting

Through-Hole Non-intrusive

Ferromagnetic Concentrator

Core-type - External

Factory Calibration

mV/mT

End Of Line [EOL] Reprogramming

Correction of field factor “mT/A” variation needed:

  • On-Chip or External Micro
  • Degraded Accuracy (no correction)

Current Sensing Range

10-5000A

Cross-talk Immunity

Core

Series

MLX91207 series


MLX91209 series

IMC-Hall®

Sensing Technology

Hall-Effect

Mounting

Surface-Mount Non-intrusive

Ferromagnetic Concentrator

Integrated Magnetic Concentrator (IMC)

Factory Calibration

mV/mT

End Of Line [EOL] Reprogramming

Correction of field factor “mT/A” variation needed:

  • On-Chip or External Micro
  • Degraded Accuracy (no correction)

Current Sensing Range

30-1000A

Cross-talk Immunity

Shield

Series

MLX91206 series


MLX91208 series