High-bandwidth current sensors streamline high power density designs

Allegro MicroSystems, Inc. has released two new XtremeSense TMR sensors that streamline high power density designs, provide space and cost savings while improving energy efficiency. Its latest solutions, CT455 and CT456, offer high-bandwidth and low noise that allow precise current measurements for AI data centre and automotive powertrain applications.  

The company's new current sensors, using XtremeSense TMR technology, satisfy many of the challenges engineers face by providing superior magnetic sensitivity, low power consumption and a compact size compared to other solutions. The CT455 sensor supports two standard field ranges, enabling it to sense and translate magnetic fields into a linear analog output voltage, while the CT456 supports a preprogrammed 6mT field range. Unlike other market solutions, its newest sensors offer distinct advantages, as they are designed to allow smaller, more efficient, high-accuracy current measurements on PCB or Busbar applications from 80A up to above 800A, depending on the configuration, with the best performance advantages in the 80-200A range.  

“The release of the CT455 and CT456 sensors marks an important milestone for Allegro as the first TMR products launched since the acquisition of Crocus,” said Ram Sathappan, senior director, Global Marketing and Applications at Allegro MicroSystems. “Our newest current sensors utilising Allegro’s XtremeSense TMR technology represent a huge leap forward for high bandwidth current sensing and monitoring, reinforcing our ongoing commitment towards driving broader adoption of TMR technology. As a smaller, more efficient solution, our new TMR current sensors provide significant benefits over existing market solutions and technologies that our customers have been looking for.” 

Unlike traditional high-power current sensors, the company's newest TMR sensors provide a contactless, non-intrusive solution that delivers 1MHz bandwidth and a 300ns response time to allow faster power conversion. For those seeking to maximise power while minimising footprint, the compact design, enhanced reliability, and efficiency improvements of the company's latest sensors make them an excellent choice.