Infineon TLE4905LHALA1: High-Precision Hall Effect Switch for Automotive Applications
The increasing electrification and automation of modern vehicles demand highly reliable and precise sensing solutions. At the heart of many of these critical systems are Hall effect sensors, which convert magnetic fields into electrical signals without physical contact. The Infineon TLE4905LHALA1 stands out as a premier high-precision, ultra-sensitive Hall effect switch engineered specifically for the rigorous demands of the automotive industry.
This sensor is designed to provide digital switching signals in response to alternating magnetic fields, making it an ideal component for a vast array of applications. Common uses include:
Position sensing for seat, pedal, and transmission systems.
Speed detection for wheel speed and crankshaft/camshaft rotation.
End-point detection in electric windows, sunroofs, and sliding doors.
A key feature of the TLE4905LHALA1 is its exceptional magnetic stability, achieved through a dynamic offset cancellation technique. This method significantly reduces the inherent drift of the Hall plate's offset voltage, which is caused by mechanical stress, temperature fluctuations, or other environmental factors. The result is a highly accurate and repeatable switching point over the entire operating range, ensuring long-term reliability.
Engineered for the automotive environment, the sensor boasts an extended operating voltage range from 2.7 V to 24 V and can handle load dump events up to 40 V. Its robust design ensures reliable operation across a wide temperature range of -40 °C to 170 °C, making it suitable for under-the-hood applications. Furthermore, it offers reverse polarity protection, safeguarding the sensor and the broader electronic system from accidental miswiring during installation or maintenance.
The device features an open-drain output capable of sinking up to 20 mA, allowing it to directly interface with microcontrollers or other logic circuits. Its ultra-low power consumption is a critical advantage for electric and hybrid vehicles, where minimizing energy drain is paramount for maximizing range. Packaged in a small, surface-mount SOT-23 3L package, it also supports easy integration into space-constrained designs.
ICGOODFIND: The Infineon TLE4905LHALA1 is a robust and highly reliable Hall effect switch that exemplifies precision engineering for automotive systems. Its superior magnetic stability, wide operating voltage and temperature range, and low power consumption make it a top-tier choice for designers developing safety-critical and performance-oriented automotive applications, from powertrain to body electronics.
Keywords: Hall Effect Switch, Automotive Applications, High-Precision, Magnetic Stability, Wide Temperature Range.