Infineon Technologies TLE49631MXTMA1

Overview

TLE49631MXTMA1 from Infineon Technologies is a bipolar Hall effect latch IC designed for automotive position sensing in high-temperature environments. It features ±2 mT magnetic operate/release thresholds, 3.0–5.5 V supply operation, open-drain output, low jitter (0.28 µs typ), and AEC-Q100 qualification for use in brushless DC motor commutation and window lifter index counting.

For engineers reviewing the TLE49631MXTMA1 datasheet, TLE49631MXTMA1 pinout, TLE49631MXTMA1 application, or TLE49631MXTMA1 equivalent, key selection criteria include magnetic threshold stability over –40°C to +170°C, ESD robustness (4 kV HBM), SOT23-3 package compatibility, and latch behavior with chopper-stabilized Hall sensing.

Technical Context

The TLE49631MXTMA1 integrates a spinning Hall probe with chopper stabilization and dynamic offset cancellation to maintain precise magnetic switching thresholds across temperature. Its internal voltage regulator enables direct connection to a regulated 3.0–5.5 V rail, eliminating need for external LDO.

Functional blocks include oscillator-driven sequencing, demodulated amplifier chain, comparator with hysteresis, and open-drain driver stage. The latch output retains state until opposing magnetic polarity exceeds release threshold (BRP = –2 mT), enabling reliable edge detection in rotating pole-wheel systems.

Key Specifications

Pinout & Package

Package: PG-SOT23-3-15 - surface-mount, 3-pin, lead-free, RoHS-compliant package with 0.65 mm pitch and exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bipolar Hall latch applications.

Compared with AL33201EUA-T and US5881LUA, TLE49631MXTMA1 delivers superior thermal resilience (170°C), tighter magnetic thresholds (±2 mT), lower jitter (0.28 µs), and full AEC-Q100 compliance-making it the preferred choice for under-hood BLDC commutation and safety-related position sensing.

Availability

TLE49631MXTMA1 is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and chassis systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TLE49631MXTMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and sensor solutions, with global manufacturing and R&D infrastructure.

The TLE4963x family targets high-reliability automotive Hall sensing, engineered specifically for precision latch behavior in extreme thermal environments and mechanically demanding applications like motor commutation and occupant safety systems.

FAQ

What is the recommended PCB layout for minimizing noise coupling into TLE49631MXTMA1?

Place a 100 nF X7R ceramic capacitor between VDD and GND within 2 mm of the pins. Route GND directly to a solid ground plane beneath the device. Avoid routing noisy signals (e.g., PWM traces) near the Hall-sensitive area centered under pin 2. Maintain ≥0.5 mm clearance from copper pours to the package outline per Infineon's PG-SOT23-3-15 footprint guidelines.

Does TLE49631MXTMA1 require an external pull-up resistor on the Q pin?

Yes - the Q pin is open-drain and requires an external pull-up resistor to define the logic-high voltage level. Typical values range from 2.2 kΩ to 10 kΩ depending on rise-time requirements and bus voltage (up to 24 V). Pull-up to VDD is acceptable for 3.3 V or 5 V systems; higher voltages require level-shifting or resistor network design per application circuit Figure 7 in the datasheet.

How does the chopper stabilization architecture improve performance over conventional Hall latches?

Chopper stabilization alternately reverses Hall plate bias and demodulates the signal to cancel low-frequency offset drift caused by temperature gradients and stress. This enables ±2 mT magnetic threshold stability over –40°C to +170°C without trimming, unlike non-chopped devices that typically drift >±10% across temperature and require factory calibration or compensation algorithms.

Can TLE49631MXTMA1 be used in reverse-battery protection circuits?

No - TLE49631MXTMA1 lacks reverse-polarity protection and will be damaged if VDD is driven negative relative to GND. It must be powered from a properly polarized supply. For reverse-battery tolerant designs, add external protection such as a series Schottky diode or ideal diode controller upstream of the VDD pin, as confirmed in Absolute Maximum Ratings Table 3 (VDD min = –0.3 V).