Allegro MicroSystems has developed advanced current sensors utilizing XtremeSense TMR technology, addressing efficiency and design challenges in AI data centers and automotive powertrains.
Recently introduced CT455 and CT456 sensors offer precise current measurements with high bandwidth and low noise. These sensors, a result of Allegro’s acquisition of Crocus Technologies, improve energy efficiency and reduce space and cost in high-power density designs. Allegro’s patented XtremeSense technology is a step forward in delivering compact, high-performance solutions that aid engineers in overcoming conventional design issues.
Engineers working in fields like AI data centers, automotive powertrains, and power conversion systems are the primary audience for these sensors. The precision, compactness, and energy efficiency of the sensors makes them particularly appealing for those looking to streamline designs while maintaining accuracy and reliability in high-power applications.
Current sensor modules in the market today are often bulky, intrusive, and lack the accuracy required for modern applications. These limitations result in increased costs and longer production times for engineers. As claimed by Allegros, their sensors stand out by offering superior magnetic sensitivity and low power consumption. Their compact size is particularly advantageous for PCB or Busbar applications, supporting current measurements from 80 A up to 800 A.
The CT455 sensor, in particular, operates with two standard field ranges, allowing it to convert magnetic fields into a linear analog output voltage. Meanwhile, the CT456 offers a preprogrammed 6 mT field range, making it highly suitable for high-accuracy applications. These new sensors are optimized for applications in the 80-200 A range, offering superior performance and precision in that bracket.
According to Ram Sathappan, Allegro’s Senior Director of Global Marketing, the release of these sensors marks a significant milestone: “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.” He emphasized that these sensors represent a “huge leap forward for high bandwidth current sensing and monitoring.”
The TMR sensors offer a contactless, non-intrusive solution, with a bandwidth of 1 MHz and a response time of 300 ns. They support high current measurements and enhance power conversion speed, making them highly efficient while minimizing footprint—ideal for modern, high-performance applications
