App note from Bourns’ comparing current shunt resistors and hall effect current sensing pros and cons. Link here (PDF)
Current sensing is an essential design function that is necessary in a broad range of applications. For example, current sensing is needed to detect a battery’s capacity, to measure current flow, or to calculate angles in motor control applications. Applications that can benefit from current sensing include Battery Management Systems (BMS), 3-Phase motor control units and On-Board Charging (OBC) Systems used in electric vehicles (EVs), and in other high energy charging-based designs.
Current sensing is also advantageous in medical equipment to detect leakage current. Additionally, it is beneficial for equipment with grounding loops to effectively monitor the level of current flow. Adding current sensing to the design is a cost-effective way to help protect equipment from excessive electrical loads.
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