Nisshinbo Micro Devices has come out with a digital earth leakage current detector IC designed to enhance the safety and reliability of electrical systems by integrating advanced overvoltage and DC current detection capabilities.
The NA2201 is a CMOS-based digital detector IC specifically developed for use in earth leakage current breakers.
It features a built-in high-precision 14-bit ADC that converts analogue signals from a Zero-phase-sequence Current Transformer (ZCT) into digital data. This data is then processed to determine if an earth leakage condition exists, subsequently activating an external thyristor when necessary.
The NA2201 has selectable earth leakage detection, supporting both Type A and Type AC conditions. It offers a five-time trip-levelimmediate response feature, which can be toggled on or off as needed, enhancing its adaptability to different safety requirements.
Additionally, the IC includes an overvoltage detection function that also caters to neutral conductor open-phase protection, making it a comprehensive solution for preventing electrical faults. A variety of options for operation and safety features is set by three selection pins.
The detector IC is also equipped with individual time delay settings for earth leakage and overvoltage detection, which can be adjusted using external capacitors. This flexibility allows for precise tuning of the delay settings to match specific application needs. Furthermore, the IC can detect DC current, providing an additional layer of protection, which is especially suitable in applications like mode 3 electric vehiclechargers.
The NA2201 is now available for purchase, providing an advanced, reliable solution for earth leakage and overvoltage detection in various applications. For more information or to place an order, please visit our official website and check our list of qualified local and online distribution partners.
NA2201 Specifications:
• Power Supply: VDD 4.0V to 5.5V • Operating Temperature: -40°C to 105°C • Built-in High Precision ADC: 14-bit • Sinc3 Digital Filter: -3dB Frequency = 150Hz • Internal Power Supply: VREG = 3.3V • Earth Leakage Detector Condition:
Type A / Type AC selectable
• Five times trip level immediate response:
ON / OFF selectable
• Over voltage detection:
Correspond to Neutral conductor open-phase protection
• DC current detection
Individual time delay functions set by an external capacitor:
Earth leakage detection / Over voltage detection
• Minimum non-operating time: 2 types prepared • Package NA2201NB: SSOP-16-BD • Datasheet: NA2201 Consumer version
