NSM211x Series High-Precision AEC-Q100 Current Sensors Eliminate Need for External Isolation Components

发布时间:2024-11-15 14:30
作者:AMEYA360
来源:novosns
阅读量:364

  NOVOSENSE Microelectronics, a semiconductor company specializing in high-performance analog and mixed-signal chips, has announced the NSM211x, a series of automotive-grade fully integrated high-bandwidth, high-isolation current sensors that both ensure precise current measurement and eliminate the need for any external isolation components.

NSM211x Series High-Precision AEC-Q100 Current Sensors Eliminate Need for External Isolation Components

  On display at Electronica 2024 (Stand B5.450), the automotive-grade series targets applications including OBC/DC-DC converters, PTCs, automotive motor control, charging station current detection and fuel cell systems.

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

  With a -3 dB bandwidth of up to 1 MHz and a response time of 400 ns, the NSM211x series helps control systems achieve rapid loop control and overcurrent protection. The series also features a creepage distance of up to 8.2mm and isolation voltage withstand of 5,000 Vrms per UL standards, with a maximum working isolation voltage of 1,618 Vpk.

  It is available in three packaging options, SOP8, SOW16 and SOW10. These respectively have a primary side impedance of 1.2 mΩ, 0.85 mΩ/1 mΩ and an industry leading 0.27mΩ, with a continuous current handling capability of up to 100 A. Multiple product models are available for each package.

  The current sensors integrate internal temperature compensation algorithms and offline calibration to enable a high measurement accuracy (<±2% sensitivity error and <±10 mV offset error) across the full temperature range, with no need for secondary programming.

  The NSM211x series supports 3.3 V and 5 V power supply voltage as well as DC or AC current measurement with a current range of 5~200 A with options for reference voltage output, overcurrent protection output, and configurable overcurrent protection thresholds.

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According to the working life of chips at different temperatures and voltages, the working voltage of chips under the minimum rated life and failure rate during the target life can be fitted by Weibull distribution, and then VIORM and VIOSM can be obtained according to the requirements of the VDE correlation coefficients. It can also be seen from the table that reinforced isolators have a longer working life and a lower failure rate during their life.  After passing the above tests, isolators are deemed to have met the requirements for VDE certification.  To sum up, electrical isolation involves the working safety of devices and the personal safety of users, and is an indispensable part of electrical system design.
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