Nanochip Micro-Integrated Current Sensor NSM211x: From Industry to Automotive

Nanochip announced the launch of the new automotive-grade high-bandwidth integrated current sensor NSM211x series, which is a fully integrated high-isolation current sensor solution that can achieve accurate current measurement without any external isolation components.

With its superior performance, the NSM211x series products have been widely used in AC or DC current detection in the industrial field. The automotive-grade product series launched this time meets the reliability standard requirements of AEC-Q100 Grade 0, can operate stably in a more stringent operating temperature range (-40~150℃), and exhibits high precision, high isolation and withstand voltage, strong current capacity, high reliability and other characteristics, meeting the needs of AC or DC current detection in automotive applications.

Integrated current sensors are widely used in automobiles. The main application scenarios of the NSM211x series include: OBC/DC-DC, PTC, on-board motor control and charging pile current detection. In these key applications, the current sensor accurately captures the current data in the power supply , converter and motor winding, which is crucial to maintaining the stability and safety of the automobile control system . In addition, the NSM211x series can also be used in on-board fuel cell systems to achieve multi-objective optimization control during low-temperature startup, high-temperature operation and switching, providing strong support for the intelligent and efficient operation of automobiles.

Nanochip's automotive-grade high-bandwidth integrated current sensor NSM211x series

The NSM211x series covers three types of packages : SOW10 (0.27mΩ primary impedance ), SOW16 (0.85mΩ/1mΩ primary impedance), SOP8 (1.2mΩ primary impedance), and each package contains multiple product models. With different optional package forms, DC input/AC input, proportional output/fixed output, whether with reference voltage , whether with overcurrent protection , and whether the threshold is adjustable, the NSM211x series can meet different system application requirements.

High bandwidth and fast response

Relying on the unique circuit design , the NSM211x series achieves a -3dB bandwidth of up to 1MHz and a response time as low as 400ns, which helps the control system to achieve fast loop control and overcurrent protection, and provides a more compact and reliable solution for power supply and other application scenarios, making the system BOM simpler and more cost-effective.

High isolation, pressure resistance, strong flow capacity

The NSM211x series achieves a creepage distance of up to 8.2mm , a withstand isolation voltage of 5000Vrms and a maximum operating isolation voltage of 1618Vpk that meet UL standards. At the same time, it achieves an industry-leading primary impedance as low as 0.27mΩ and a continuous current capacity of up to 100A, further reducing the difficulty of heat dissipation design in compact systems.

High-precision standards without secondary programming

Thanks to the precise temperature compensation algorithm and offline calibration inside the chip , the NSM211x series can maintain high measurement accuracy over the entire operating temperature range. Users do not need to reprogram, and can achieve a sensitivity error of <±2% and a zero point error of <±10mV over the entire temperature range.

Flexible selection

The NSM211x series supports 3.3V or 5V supply voltage (different power supply versions) to meet the needs of different power supply systems; supports DC current or AC current measurement, with a current range of 5~200A; supports reference voltage output, overcurrent protection output, and overcurrent protection threshold configuration options.