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Accurate current sensing is used in a wide variety of applications where the current is either regulated as part of a feedback loop – in a switched mode power supply (SMPS), for example, or a to control torque and speed in a motor driver - or controlled to detect levels that could be critical or dangerous for the system and implement appropriate over-current protections.

Very often current sensing is performed by measuring the voltage drop developed across shunt-resistors that can be connected to ground (low-side sensing) or to the supply rail (high-side sensing).

ST provides a range of solutions to help engineers implement high-efficiency and accurate current sensing applications including current-sense amplifiers, high-precision operational amplifiers and comparators.

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Technical Documentation

    • Description Version Size Action
      AN4369
      Adjustable gain with a current sensing
      2.0
      632.09 KB
      PDF
      AN4366
      Compensate the input offset of a high-side current sensing
      1.0
      280.34 KB
      PDF
      AN4835
      High-side current sensing for applications using high common-mode voltage
      1.0
      657.19 KB
      PDF
      AN4304
      How to filter the input of a high-side current sensing
      1.0
      528.94 KB
      PDF
      AN4369

      Adjustable gain with a current sensing

      AN4366

      Compensate the input offset of a high-side current sensing

      AN4835

      High-side current sensing for applications using high common-mode voltage

      AN4304

      How to filter the input of a high-side current sensing