Allegro introduces current sensors in surface-mount option

Current sensors offer easy handling and layout for high current density applications, says Allegro Microsystems, as it announces that the ACS772 / ACS773 family now includes through-hole and surface-mount CB package options with enhanced working isolation voltage.

Enhancements have been made to the automotive grade, high voltage isolation current sensors which are used in both AC and DC current sensing up to 400A. Allegro’s new surface-mount leadform option for the CB package addresses customers’ challenges of use in space-constrained applications.

The surface-mount option complements the through-hole version, enabling high current PCB designs to be used to improve power density and efficiency.

The ACS772 / ACS773 current sensor ICs have a range of features to make them particularly suitable for a range of applications, from industrial robots to electric vehicles. They have a fast response time of 2.5 microseconds which enables over-current fault detection; this feature is particularly aimed at safety-critical applications.

They offer enhanced working isolation voltages up to 13,00kV+ for basic DC voltage, and 650V+ for reinforced isolation DC voltage. There is no need for opto-isolators or other isolation techniques, says Allegro.

The sensors boast high accuracy of ± 2.1per cent over the lifetime of the IC.

Surface mount current sensors are suitable for a range of green energy applications, for example in solar applications to raise the system voltage to allow for longer strings, eliminating both wiring and connector combiner boxes. It also allows for longer panel strings with higher rated output inverters, which reduces losses and improves efficiency, adds Allegro.

Allegro MicroSystems specialises in power and sensing technologies for a range of markets from green energy to advanced mobility and motion control systems. The company provides global engineering, manufacturing and support.

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