Infineon TLE49901/TLI49901 XENSIV Magnetic Position Sensors

Introduction

The Infineon TLE49901/TLI49901 XENSIV series consists of analog ratiometric linear Hall-effect sensors designed for accurate magnetic position measurement. These sensors support non-contact measurement of displacement, linear movement, and angular position using an external magnet.

Part Description

TLE49901 and TLI49901 magnetic position sensors measure magnetic field changes across a ±45 mT range and provide a ratiometric analog output signal. Their linear Hall sensing principle makes them suitable for applications where a moving magnet must be translated into a reliable electrical signal.

Key characteristics include:

• Analog ratiometric output for straightforward signal processing
• Linear magnetic sensing over a ±45 mT range
• High bandwidth for responsive position and movement detection
• Low noise for improved measurement stability
• Low temperature drift for dependable operation across changing environments
• Low lifetime drift for long-term sensor accuracy
• Contactless sensing, reducing wear compared with mechanical potentiometers or switches
• Support for displacement, linear travel, and angle measurement systems

Because the sensors operate without physical contact between the sensing element and the moving object, they can improve reliability in systems exposed to vibration, dust, repeated movement, or mechanical wear.

Applications

Potential applications for the TLE49901/TLI49901 include:

• Linear position sensing
• Rotary and angular position measurement
• Pedal position sensing
• Throttle and actuator position feedback
• Lever and joystick position detection
• Valve travel monitoring
• Cylinder and piston displacement measurement
• Brushless motor commutation support
• Motor shaft position feedback
• Gear and mechanism movement detection
• Battery-powered tool trigger sensing
• Contactless replacement for potentiometers
• Magnetic encoder and motion-control assemblies

Industries

These magnetic position sensors can be used in a range of industries, including:

• Automotive
• Industrial automation
• Factory equipment
• Robotics
• Consumer electronics
• Power tools
• Home appliances
• Energy and power-management equipment
• Material handling
• Agricultural machinery
• Medical and laboratory equipment
• Transportation systems

Usage Ideas

1. Contactless Linear Actuator Feedback

Mount a small permanent magnet to a moving actuator rod and place the sensor along its travel path. The ratiometric output can be used by a controller to monitor extension and retraction position without a mechanical linkage.

2. Rotary Knob or Lever Position Sensor

Attach a diametrically magnetized magnet to a rotating shaft, knob, or lever. With suitable mechanical and magnetic placement, the sensor can provide an analog signal representing the component’s angular position.

3. Power Tool Trigger Position Monitor

Integrate the sensor and a small magnet into a variable-speed power tool trigger mechanism. The output can indicate trigger travel, allowing an electronic controller to adjust motor speed according to user input.

Conclusion

Infineon’s TLE49901/TLI49901 XENSIV magnetic position sensors provide a durable and accurate option for non-contact position measurement. Their analog ratiometric output, ±45 mT linear sensing range, low drift, low noise, and high bandwidth make them well suited to automotive, industrial, consumer, and power tool designs requiring dependable displacement or angle feedback.