Infineon TLE49663KHTSA1 Hall-Effect Sensor: Datasheet, Pinout, and Application Circuit Guide

The Infineon TLE49663KHTSA1 is a high-performance, Hall-effect latch designed for robust industrial and automotive applications. This sensor provides magnetic switching with superior reliability, making it ideal for position and speed sensing in harsh environments, such as in brushless DC motor commutation, gear tooth sensing, and end-position detection.

Datasheet Overview

Key parameters from the datasheet define the sensor's capabilities. It operates from a supply voltage range of 3.0 V to 32 V, ensuring compatibility with both 5 V and 12 V systems. The device features reverse polarity protection up to -32 V, a critical safeguard against wiring errors. Its operating junction temperature extends from -40 °C to 170 °C, qualifying it for the most demanding automotive under-the-hood applications. The output is an open-drain N-channel MOSFET capable of sinking up to 25 mA, allowing it to directly drive coils, LEDs, or interface with a microcontroller.

Pinout Configuration

The TLE49663KHTSA1 is available in a standard SOT23-3 surface-mount package.

Pin 1 (VCC): Supply voltage input. A decoupling capacitor should be placed close to this pin.

Pin 2 (GND): Ground connection for the IC.

Pin 3 (OUT): Open-drain output. A pull-up resistor to VCC is required for proper operation.

Application Circuit Guide

A typical application circuit is straightforward but requires attention to detail for optimal performance.

1. Power Supply Decoupling: Place a 100 nF ceramic capacitor as close as possible between the VCC (Pin 1) and GND (Pin 2) pins to suppress high-frequency noise.

2. Output Pull-Up Resistor: Connect a pull-up resistor between the OUT pin (Pin 3) and the positive supply rail (VCC). The value of this resistor (e.g., 1 kΩ to 10 kΩ) depends on the required switching speed and the current sink capability. A smaller resistor provides faster rise times but draws more current.

3. Magnetic Considerations: The sensor switches its output state based on the applied magnetic flux density. The switching points (Bop and Brp) are precisely defined in the datasheet. Ensure the magnetic field applied perpendicularly to the marked side of the package exceeds the operate point (Bop) to switch the output low and falls below the release point (Brp) to switch it high.

For extreme noise environments, such as in automotive systems, additional measures like a series resistor on the output line or an RC filter on the supply may be necessary.

ICGOODFIND Summary

The Infineon TLE49663KHTSA1 stands out as an ultra-robust and versatile Hall-effect latch. Its wide voltage range, high-temperature capability, and integrated protection features make it a premier choice for designers tackling challenging position and speed sensing tasks. The simple 3-pin interface and straightforward application circuit facilitate quick integration into new and existing designs, ensuring reliable operation where other components might fail.

Keywords: Hall-Effect Latch, Magnetic Switching, Reverse Polarity Protection, Position Sensing, Automotive Grade