Time: 2024-08-18  韦克威科技

Development of Current Sensors - Weikewei TMR Tunnel Magnetoresistance Technology

Weikewei offers a new series of current sensors based on TMR technology, which is cost-effectiveSingle chip formAchieved industry-leading precision, bandwidth, and step response performance.

High precision, broadband, TMR based current sensors can be used in various ADC and microprocessor based power systems and applications. STK-616EIt is a fully integrated bidirectional current sensor that provides higher DC accuracy and dynamic range compared to alternative solutions.For example, the typical accuracy of the ± 50A version is ± 0.5%, and it guarantees an accuracy of ± 2.0% (maximum) at 85 ° C.These new current sensors are packaged in SOIC-16 according to industry standards (see Figure 2), with a low impedance (0.9 milliohms) current path and UL/IEC/EN certification, suitable for isolation applications.



Figure 2: TMR based current sensor

STK-616EThe sensor also ensures a ± 60mA offset or ± 0.3% FSR (maximum value) across the entire temperature range, which means high accuracy can be achieved within a current range of approximately 10:1, resulting in significant improvements compared to the leading dynamic range. Devices based on Hall sensors.The new series of devices perfectly combines high precision, 1.5MHz signal bandwidth with industry benchmark phase shift and frequency, fast output step response, and 4.8kV isolation performance, making them highly suitable for current sensing and high-performance power protection consumables in fast current control loops, inverters, and motor control applications.STK-616EThe fast response and high bandwidth are also ideal choices for quickly switching power levels based on SiC and GaN,Enable power system designers to achieve higher speeds and smaller components using wide bandgap devices.STK-616EIt also provides integrated overcurrent detection markers to help achieve the required overcurrent detection in modern power systems.The supported current range is ± 50, ± 30, and ± 20A, and the device provides a fixed gain(STK-616E)Proportional gain(STK-616E)Version.