New Industry Products

New Surface-Mount Fully Integrated Current Sensors Offer Easy Handling and Layout for High Current Density Applications

November 07, 2019 by Allegro MicroSystems

This article highlights Allegro Microsystems high current fully integrated ACS772/3 current sensor “CB” package family that is an automotive grade.

The ACS772/3 family expands to include through-hole and surface-mount CB package options with enhanced working isolation voltage

Allegro MicroSystems, a global leader in power and sensing solutions for motion control and energy efficient systems, today announced significant ease-of-use enhancements to its popular high current fully integrated ACS772/3 current sensor “CB” package family.


Allegro Integrated Current Sensors Product Highlight

Image courtesy of Allegro Microsystems.


These industry-leading, automotive grade high voltage isolation current sensors already provide economical and precise solutions for both AC and DC current sensing up to 400A. Building on that leadership and deep customer-understanding, Allegro’s new surface-mount leadform option for the CB package is the answer to many customer challenges by providing a flexible solution for space constrained applications.


Flexible. Easy. Efficient.

“This is a classic, ‘You asked – we listened.’  innovation with purpose moment for us,” explains Shaun Milano, Business Unit Director for Current Sensors. “Our customers want flexibility, and we’re excited to provide these innovative, robust solutions in this new surface-mount option to complement our highly popular through-hole version. High current PCB designs improve power density and efficiency and this surface-mount option allows customers to realize these advantages with a simpler manufacturing process.”

The ACS772/3 family of current sensor ICs has an enhanced feature set that helps engineers simplify their bill of materials and improve efficiency in the toughest of applications:

  • Small form footprint over competing solutions

  • Very fast 2.5uS response time that enables overcurrent fault detection - ideal for safety-critical applications

  • Enhanced working isolation voltages up to 1300V+ for basic DC voltage, and 650V+ for reinforced isolation DC voltage - No need for opto-isolators or other costly isolation techniques.  

  • High accuracy of +/-2.1% over the lifetime of the IC


These features make the ACS772/3 family ideal for a range of applications from industrial robotics to electric vehicles.

“Many of our customers, especially in green energy applications, are looking for higher working voltages which can provide efficiency improvements and cost reductions in their systems,” said Milano. “In solar applications for instance, raising the system voltage allows for longer strings, which eliminates significant wiring and connector combiner boxes.  It also allows for longer panel strings with higher rated output inverters, which reduces losses and improves efficiency.  These improvements are a win-win for our customers.”

For more details on the ACS772/3 family, including the new surface-mount option, and to learn more from Allegro’s current sensor team:

  • Visit the ACS772 and ACS773 product pages for device specifications and the datasheets.

  • Check out our application notes such as the ACS772 and DC Current Capability and Fuse Characteristics of Current Sensors found in our Insights & Innovations library

  • Contact your local sales office for more information and to request samples today.


About Allegro Microsystems

Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro’s innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide.

Allegro MicroSystems Europe, headquartered in Chertsey, United Kingdom, is the European sales and marketing operation, and operates a network of representatives and distributors throughout Europe. Allegro also has an engineering design centre in Edinburgh in Scotland and an application and marketing centre in Annecy in France.