Allegro MicroSystems Unveils Industry’s First Production Ready 10MHz TMR Current Sensor

Allegro MicroSystems, Inc. introduced the industry's first commercially available magnetic current sensor to achieve 10MHz bandwidth featuring Allegro’s advanced XtremeSense™ TMR (tunneling magnetoresistance) technology. The new ACS37100 TMR current sensor helps power system designers master the control signal chain and unlock the full potential of fast-switching GaN and SiC FETs. Tailored to the needs of electric vehicles (xEVs), clean energy power conversion systems, and AI data center power supplies, the ACS37100 achieves an industry-leading 50ns response time, providing the high-fidelity data needed for optimal efficiency and protection in demanding high-frequency applications.

Migration to GaN and SiC promises greater power density and efficiency, but their faster switching speeds create significant control challenges. At sub-megahertz frequencies, conventional magnetic current sensors lack the speed and precision to provide the high-fidelity, real-time data required for stable control and protection loops. This can leave advanced systems vulnerable to damage and may prevent them from operating at their full potential.

The ACS37100 is engineered to solve this control challenge. Its industry-leading bandwidth and response time provide the high-fidelity current sense feedback essential for demanding control loops in high-speed switching applications. This magnetic current sensor enables designers to confidently and reliably control faster systems, maximize efficiency, and increase power density. Leveraging advanced TMR technology, the device delivers exceptionally low noise of 26mA root mean square (RMS) across the full 10MHz bandwidth – enabling precise, high-speed current measurements for more accurate and responsive system performance (more info).

robenek@dps-az.cz