Allegro MicroSystems Hall-effect Current Sensor

The ACS71010 is a 400 kHz, fully integrated, high-accuracy, Hall-effect current sensor ideal for use in control loops of demanding power conversion applications. Current flows through the internal conductor coupling the magnetic field generated to the Hall sensor IC. As a result of the lack of physical connection between the current and the IC, high-voltage isolation is achieved. The current is sensed differentially by two Hall plates that subtract interfering external common-mode magnetic fields. The sensor is factory-trimmed to provide high accuracy over the entire operating range without the need for customer programming. The sensor has an analog output and a zero current reference output for signal integrity in noisy environments. A fast over-current fault output is included, having a user-configurable threshold via an analog input pin, providing short-circuit detection and enhanced system protection.