سنسور و مبدل سنسور جریان

Product Attributes

Introduction

TLE4972 is a high precision miniature coreless magnetic current sensor for AC and DC measurements with analog interface and two fast over-current detection outputs.

Infineon's well-established and robust monolithic Hall technology enables accurate and highly linear measurement of the magnetic field caused by currents. With a full scale up to ±31 mT it is possible to measure currents up to 2,000 ampere. All negative effects (e.g. saturation, hysteresis) commonly known from open loop sensors using flux concentration techniques are avoided. The sensor is developed in accordance to functional safety standard ISO 26262 and is equipped with internal self-diagnostics.

Typical applications are electrical drives, on board chargers, battery main switches, power supplies, over-load and over-current detection in high voltage applications.

The digitally assisted analog concept of TLE4972 offers superior stability over temperature and lifetime thanks to the Infineon proprietary digital stress and temperature compensation. The differential measurement principle allows great stray field suppression for operation in harsh environments.

The sensor is available in two packages to support a wide range of different system integration scenarios.

Two separate over current detection pins (OCD) provide a fast output signal in case the measurement current exceeds the configured thresholds in typical 0.7 μs.

The sensor is shipped as a pre-calibrated product, which provides an accurate performance over temperature and stress. The TLE4972 has in-situ calibration capability to achieve maximum accuracy at the system level.

The high configurability enables customization for a wide variety of applications.

Features

• High accurate, scalable, DC & AC current sensing.
• Very low sensitivity error over temperature and lifetime.
• Excellent stability of offset over temperature and lifetime.
• High bandwidth provides fast response time and low phase delay.
• Differential sensor principle ensures superior magnetic stray field suppression.
• Two independent fast Over-Current Detection (OCD) pins with configurable thresholds enable fast protection mechanisms for power circuitry (typical 0.7 μs).
• Full scale up to 31 mT for high current applications.
• Small form factor enables low insertion resistance and less power loss.
• Configurable analog output operational modes (fully-differential, semi-differential or single-ended, uni- and bidirectional with or without ratiometricity).
• Supply voltage 3.1 to 3.5 V.
• Developed in accordance with ISO 26262 for safety requirements rated up to ASIL B.
• Different package solutions for optimal system integration in different wiring schemes.

Applications

• Automotive electrical drives
• Auxiliary drives
• Current monitoring
• Overload and over-current detection
• Automotive power train
• Battery main switch
• Electronic power steering
• On board chargers