ACEINNA launches high-accuracy current sensors based on AMR technologyEngineering360 News Desk | February 12, 2019
ACEINNA has announced its new MCx1101 family of ±5 A, ±20 A and ±50 A current sensors for industrial and power supply applications. The company said its the first high-accuracy wide bandwidth anisotropic magnet resistance (AMR)-based current sensors on the market.
“Our new integrated, AMR based Current Sensor family provides the best performance for the price in the industry,” said Khagendra Thapa, vice president of 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.”
ACCEINNA said the MCx1101 are fully integrated, bi-directional current sensors that offer higher DC accuracy and dynamic range compared with alternative solutions. For example, the ±20 A version has a typical accuracy of ±0.6% and is guaranteed to achieve an accuracy of ±2.0% (maximum) at 85° C.
These new current sensors also guarantee an offset of ±60 mA, or ±0.3% of force sensitive resistor (FSR) (maximum) over temperature, which means that high accuracy can be achieved over a roughly 10:1 range of currents. This is a roughly 10 times improvement in dynamic range versus leading Hall-sensor-based devices.
These devices deliver a combination of high accuracy, 1.5 MHz signal bandwidth with industry benchmark phase shift versus frequency and 4.8 kV isolation — which enables 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 ideal for fast switching SiC- and GaN-based power stages enabling 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 microseconds (µs). The MCx1101 also provides an integrated over current detection flag to help implement OCP (over current protection) required in modern power systems. Overcurrent detection response time is 0.2 µs.
The family includes ±50 A, ±20 A and ±5 A ranges, and is offered in both fixed gain (MCA1101) and ratiometric gain (MCR1101) versions. It is packaged in an industry standard SOIC-16 package with a low impedance (0.9 milliohms) current path and is certified by UL/IEC/EN for isolated applications.