Infineon Technologies TLE4957CB2E6747XTMA1

Overview

TLE4957CB2E6747XTMA1 from Infineon is a dynamic differential Hall effect sensor with integrated back bias magnet, designed for gear tooth and pole wheel position sensing in automotive transmission and engine timing systems. It delivers 0.8 mT minimum signal amplitude, 2.9 mm operational airgap, 0.001–8 kHz frequency range, and operates from −40 °C to +165 °C junction temperature.

For engineers reviewing the TLE4957CB2E6747XTMA1 datasheet, TLE4957CB2E6747XTMA1 pinout, TLE4957CB2E6747XTMA1 application, or TLE4957CB2E6747XTMA1 equivalent, key selection criteria include differential flux detection capability, adaptive hysteresis for vibration immunity, open-drain output drive strength, self-calibration jitter performance (±0.11% σ at Tj < 150 °C), and PG-SSOM-3-11 package compatibility with SMT assembly.

Technical Context

This sensor uses a dual-Hall element architecture to measure differential magnetic flux density, enabling robust detection of ferromagnetic targets under varying airgap and mechanical vibration. Its adaptive hysteresis dynamically adjusts switching thresholds based on signal slew rate, suppressing false triggering from mechanical noise or EMI.

The integrated back bias magnet (south/north pole pre-induction capable) eliminates external magnet placement, while internal 4.7 nF (Q–GND) and 47 nF (VS–GND) capacitors support stable operation in noisy power environments without requiring external decoupling.

Key Specifications

Pinout & Package

Package: PG-SSOM-3-11 - surface-mount module-style package with integrated 4.7 nF (Q–GND) and 47 nF (VS–GND) ceramic capacitors, green lead plating, RoHS-compliant (marked with 'G' prefix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential Hall position sensing applications.

Compared with TLE4957C2E6747XTMA1, the TLE4957CB2E6747XTMA1 reduces BOM count and assembly steps via integrated magnet, while TLV4957CB2E6747XTMA1 adds margin for future-proofing in high-voltage EV platforms-making the original optimal for cost-sensitive, volume automotive programs with validated mechanical layouts.

Availability

TLE4957CB2E6747XTMA1 is available at Aetrix Electronics and suitable for engine crankshaft position sensing, transmission speed monitoring, camshaft phase detection, and electric power steering rotor position applications requiring stable component supply across automotive production lifecycles.

Supply support for TLE4957CB2E6747XTMA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global manufacturing and automotive qualification expertise.

The TLE4957x series belongs to Infineon's automotive Hall sensor product line, engineered specifically for robust, high-accuracy rotational position and speed sensing in safety-critical drivetrain systems.

FAQ

What is the purpose of the integrated back bias magnet in TLE4957CB2E6747XTMA1?

The integrated back bias magnet enables detection of ferromagnetic targets (e.g., gear teeth) without requiring an external magnet. It provides a stable magnetic bias field oriented perpendicular to the IC's branded side, allowing differential Hall elements to sense flux changes induced by target motion. This simplifies mechanical design, eliminates field alignment steps, and improves repeatability in high-volume automotive assembly.

Can TLE4957CB2E6747XTMA1 operate with a 24 V supply?

No - the absolute maximum supply voltage is 18 V DC, as specified in Table 3-1. Applying 24 V exceeds the device's rated limit and risks permanent damage to the internal regulator and output stage. For 24 V vehicle architectures, a local 12 V or 5 V supply rail derived via DC/DC converter must be used.

How does adaptive hysteresis improve performance in vibrating environments?

Adaptive hysteresis dynamically widens or narrows the magnetic switching threshold based on the rate of change (dΦ/dt) of the sensed signal. During rapid transitions (e.g., high-RPM gear tooth passage), hysteresis remains narrow for precision timing; during slow or oscillatory motion (e.g., gear wobble), it widens to suppress chatter. This eliminates false pulses without sacrificing resolution.

Is the PG-SSOM-3-11 package compatible with standard reflow soldering profiles?

Yes - the PG-SSOM-3-11 package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. The pure tin (green) lead finish and Wieland K62 leadframe ensure reliable wetting and intermetallic formation. Reflow profile must maintain ≤60 sec above 217 °C and avoid thermal shock exceeding 3 °C/sec ramp rates.