Expanded coreless current sensor portfolio for EV and industrial applications

Allegro MicroSystems offers a new coreless Hall-effect current sensor for demanding automotive and industrial systems, providing higher accuracy and sensitivity, extra fault detection capabilities, and user programmability. The new ACS37610 sensor adds to the ACS37612 as the industry’s first family of truly coreless Hall sensing solutions intended to measure currents from 100A to greater than 4000A flowing through a busbar or PCB trace with a typical 1% accuracy – with no requirement for an external concentrator or U-shaped magnetic shield. These innovative solutions allow system designers to deliver enhanced efficiency and higher power density while decreasing system complexity, cost, BOM, footprint, and weight.

“As a leading innovator in current sensing solutions for more than 20 years, Allegro was first to market with coreless differential Hall-effect current sensing technology, and our new ACS37610 IC enables our customers to accurately measure hundreds or thousands of amps in a very economical and simple way,” said Shaun Milano, Director of Current Sensors at Allegro. “Our differential Hall-based sensors provide excellent immunity to stray magnetic fields without the need of a shield, required by competing solutions, that slows down response and adds non-linearity error into the system.”

The device is an optimal option for EV high-voltage traction motor inverters, 48V/12V auxiliary inverters, heterogeneous redundant battery monitoring, smart fuses, overcurrent detection, PDUs, and power supplies. The sensor’s 250kHz bandwidth, dedicated overcurrent and overtemperature fault pin, and a range of built-in diagnostics make it excellent for safety-critical applications.

The current sensor is offered in a low-profile, lead (Pb)-free, 8-pin surface mount TSSOP package. The sensor’s ultra-compact package makes it excellent for space-constrained applications while facilitating simple, cost-effective surface mount assembly. To assist developers in accelerating their designs, the company provides evaluation kits and reference tools for current flowing through a PCB or busbar.