Current sensors reduce RMS noise four-fold
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XtremeSense TMR current sensors from Allegro MicroSystems, namely the CT4022 and CT4032, target high-voltage, power-dense clean energy applications that require optimal noise performance and high-precision current measurements.
The high-voltage, power-dense current sensors reduce root mean square (RMS) noise by four times compared to Hall-based integrated products, delivering highly efficient power conversion even during light load operation for heat pumps, solar inverters, and EV chargers. With only 5mA RMS noise observed at the output, power conversion systems can operate efficiently, even under light loads.
“Allegro’s new XtremeSense TMR current sensors set an industry standard for low-noise magnetic current sensing,” said Matt Hein, Business Line Director of Current Sensors at Allegro. “They achieve a two-times reduction in root mean square (RMS) noise versus previous TMR devices and a four-times reduction compared to Hall-based integrated conductor products. The result is highly efficient power conversion, even at light load operation, enabling superior performance in heat pumps and solar inverters to the latest generation of EV chargers.”
The CT4022/32 enhances Allegro’s high-precision XtremeSense TMR current sensing portfolio by measuring the current flowing through an integrated conductor while rejecting interference from external stray magnetic fields, minimising their effect on measurements. These sensors are designed specifically for clean energy systems, where maximising power conversion efficiency is crucial. Integrated galvanic isolation allows for low-side, high-side, or in-line current sensing in applications up to 1000 V. Further, integrated galvanic isolation eliminates the need for isolated power components.
The CT4022 is available in an industry-standard 8-pin SOIC, and the CT4032 is available in an industry-standard 16-pin widebody SOIC.
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