High-precision current sensors eliminate need for external isolation components

NOVOSENSE Microelectronics has revealed the NSM211x, a series of automotive-grade fully integrated high-bandwidth, high-isolation current sensors that ensure precise current measurement and eradicate the necessity for any external isolation components.

Certified to meet AEC-Q100 Grade 0 reliability standards, the series is created to operate stably within a wide temperature range (-40C to 150C) and fulfils the requirements of AC or DC current detection in automotive applications with a high isolation voltage, strong current handling capability and high reliability.

With a -3dB bandwidth of up to 1MHz and a response time of 400ns, the series helps control systems accomplish rapid loop control and overcurrent protection. The series also features a creepage distance of up to 8.2mm and an isolation voltage withstand of 5,000Vrms per UL standards, with a maximum working isolation voltage of 1,618Vpk.

The series has three packaging options: SOP8, SOW16 and SOW10. These have a primary side impedance of 1.2mOhm, 0.85mOhm/1mOhm and an industry-leading 0.27mOhm, with a continuous current handling capability of up to 100A. Multiple product models are available for each package.

The current sensors integrate internal temperature compensation algorithms and offline calibration to allow a high measurement accuracy (<±2% sensitivity error and <±10mV offset error) across the entire temperature range without secondary programming.

The series supports 3.3V and 5V power supply voltage as well as DC or AC current measurement with a current range of 5-200A. It offers options for reference voltage output, overcurrent protection output, and configurable overcurrent protection thresholds.

Target applications include OBC/DC-DC converters, PTCs, automotive motor control, fuel cell and charging station current detection.

See the company at electronica 2024 – stand B5.450.