Aceinna launches high-accuracy current sensors based on AMR technology
Aceinna announced its new MCx1101 family of ±5 A, ±20 A, and ±50 A current sensors for industrial and power supply applications, including electric vehicle (EV) charging stations. The company says that these are the first high-accuracy, wide-bandwidth anistropic magnetoresistive (AMR)-based current sensors on the market. Units and evaluation boards are available for sampling and volume shipments.
“Our new integrated, AMR-based current sensor family provides the best performance for the price in the industry,” said Khagendra Thapa, VP Current Sensor Product for Aceinna. “There are other AMR-based current sensing solutions on the market, but they require a great deal of integration to make them work. Ours are plug and play.”
The MCx1101 are fully integrated, bi-directional current sensors that offer high DC accuracy and dynamic range. For example, the ±20 A version has a typical accuracy of ±0.6% and the company says it is guaranteed to achieve an accuracy of ±2.0% (max) at 85°C.
The current sensors also guarantee an offset of ±60 mA, or ±0.3% of FSR (max) over temperature, which means that high accuracy can be achieved over a roughly 10:1 range of currents. This is an approximate 10x improvement in dynamic range vs. leading Hall-sensor-based devices.
These devices deliver 1.5 MHz signal bandwidth with industry benchmark phase shift vs. frequency and 4.8 kV isolation, qualifying them for high- and low-side sensing in fast current control loops for high-performance power supplies, inverters, and motor control applications.
The fast response and high bandwidth of the MCx1101 is also suited for fast-switching SiC and GaN based power stages, allowing power system designers to make use of the higher speeds and smaller components enabled by wide band-gap switches. Output step response time is 0.3 µs. The MCx1101 also provides an integrated over-current detection flag to help implement over current protection (OCP) required in modern power systems. Over current detection response time is 0.2 µs.