The TLE4976L is a high-precision coreless current sensor from Infineon Technologies. This sensor is designed for accurate and reliable current measurement in a wide range of applications, offering galvanic isolation between the current-carrying conductor and the sensing circuitry. Its coreless design eliminates the need for a magnetic core, resulting in a smaller size, lighter weight, and reduced sensitivity to external magnetic fields.

Applications

• Electric Vehicle (EV) Inverters: Measures the motor current in EV inverters for precise motor control and performance monitoring.
• Battery Management Systems (BMS): Monitors the charging and discharging current of batteries in BMS applications for optimal battery life and safety.
• Solar Inverters: Measures the current in solar inverters for efficient power conversion and system monitoring.
• Motor Drives: Provides accurate current feedback for precise control of electric motors in industrial and automotive applications.
• Power Supplies: Monitors the current in power supplies to ensure stable and reliable operation.
• Overcurrent Protection: Detects overcurrent conditions to protect electronic circuits from damage.

Features

• Coreless Design: Eliminates the need for a magnetic core, resulting in a smaller size, lighter weight, and reduced sensitivity to external magnetic fields.
• Galvanic Isolation: Provides electrical isolation between the current-carrying conductor and the sensing circuitry for enhanced safety and noise immunity.
• High Accuracy: Offers high accuracy and linearity over a wide temperature range for reliable current measurement.
• Fast Response Time: Enables fast and accurate detection of current changes for real-time control applications.
• Differential Measurement: Reduces the impact of common-mode noise for improved accuracy.
• Overcurrent Detection: Provides a dedicated overcurrent detection pin for fast response to fault conditions.

Benefits

• Enhanced Safety: Galvanic isolation provides a high level of safety by preventing electrical shocks and ground loops.
• Improved Accuracy: The coreless design and differential measurement technique contribute to high accuracy and linearity.
• Reduced Size and Weight: The coreless design allows for a compact and lightweight sensor, making it suitable for space-constrained applications.
• Increased Reliability: The robust design and high-quality manufacturing ensure reliable operation in harsh environments.
• Simplified System Design: The integrated features and ease of use simplify the design of current sensing circuits.

The TLE4976L measures current by sensing the magnetic field generated by the current-carrying conductor. The absence of a magnetic core minimizes hysteresis and saturation effects, resulting in more accurate and linear measurements. The galvanic isolation is achieved through capacitive isolation techniques, ensuring high voltage withstand capability. The differential measurement technique reduces the impact of external magnetic fields and common-mode noise, further enhancing the accuracy of the sensor. The sensor provides an analog output voltage proportional to the measured current, which can be easily interfaced with microcontrollers or other electronic circuits. The dedicated overcurrent detection pin provides a fast response in the event of a fault condition, enabling immediate protective actions.