Infineon Technologies TLE4928CXAAF47XAMA1

Overview

TLE4928CXAAF47XAMA1 from Infineon Technologies is a highly accurate differential Hall-effect sensor IC designed for crankshaft and transmission speed sensing in automotive powertrain systems. It detects motion and position of ferromagnetic targets (e.g., gear wheels) via differential magnetic flux measurement, features dynamic self-calibration, fixed hidden hysteresis switching, and operates across –40 °C to 150 °C. Its digital open-drain output, reverse-voltage protection at VS, and integrated 4.7 nF (Q–GND) and 47 nF (VS–GND) capacitors support robust operation in harsh under-hood environments.

For engineers reviewing the TLE4928CXAAF47XAMA1 datasheet, TLE4928CXAAF47XAMA1 pinout, TLE4928CXAAF47XAMA1 application, or TLE4928CXAAF47XAMA1 equivalent, key selection criteria include differential sensitivity (±1.5 mT typical), air-gap tolerance (>2.5 mm), recalibration frequency (≥10 Hz), short-circuit/overtemperature protected output, and PG-SSO-3-9 package compatibility with back-biased encoder wheels.

Technical Context

The TLE4928CXAAF47XAMA1 implements a dual-Hall-element architecture with analog front-end filtering, offset compensation via on-chip DAC, and a tracking ADC that enables continuous recalibration during operation. Its symmetrical switching thresholds (B_OP = ±1.5 mT, B_RP = ±1.2 mT) and low cutoff frequency (<1 Hz) ensure stable detection of slow-rotating targets like crankshafts.

Internal circuitry includes clamping diodes for reverse-voltage protection at VS, N-channel open-drain output stage with short-circuit and overtemperature shutdown, and oscillator-based timing for self-calibration sequencing. The integrated 4.7 nF and 47 nF capacitors eliminate need for external decoupling in space-constrained transmission control modules.

Key Specifications

Pinout & Package

Package: PG-SSO-3-9 - surface-mount, module-style package with integrated 4.7 nF (Q–GND) and 47 nF (VS–GND) capacitors, optimized for high-vibration automotive transmission mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MLX92292ESE-AAA-000-TU and TLE4924L, TLE4928CXAAF47XAMA1 uniquely integrates both calibration intelligence and noise suppression capacitance in a single PG-SSO-3-9 module, reducing BOM count and validation effort for high-reliability powertrain sensing.

Availability

TLE4928CXAAF47XAMA1 is available at Aetrix Electronics and suitable for crankshaft position sensing, transmission input speed monitoring, and CVT pulley speed measurement requiring stable component supply across automotive production lifecycles.

Supply support for TLE4928CXAAF47XAMA1 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 electronics, and sensor solutions, with global R&D and manufacturing infrastructure.

The TLE4928 series belongs to Infineon's magnetic sensor product line, engineered specifically for high-accuracy, high-reliability rotational sensing in automotive powertrain and chassis control systems.

FAQ

What is the function of the integrated 47 nF capacitor between VS and GND?

This capacitor filters high-frequency noise and suppresses micro-cuts on the supply rail caused by solenoid switching or relay actuation in transmission control units. It eliminates the need for external bulk capacitance, reducing PCB area and improving EMC performance without compromising startup time or regulation stability.

Does TLE4928CXAAF47XAMA1 require an external magnet?

No external magnet is required. The device is designed for back-biased operation using ferromagnetic targets (e.g., gear wheels) that modulate an existing bias field-typically provided by a permanent magnet integrated into the sensor housing or mounting bracket. This simplifies mechanical design and improves reliability versus active magnet solutions.

How does the self-calibration process affect system timing during engine start?

Self-calibration completes within 100 ms after power-on, delivering valid output pulses before the first combustion event. During this period, the sensor monitors magnetic field transitions and adjusts internal offset DAC values-ensuring crankshaft position data is synchronized to the initial engine rotation without software intervention or delay penalties.

Can TLE4928CXAAF47XAMA1 be used in battery electric vehicle (BEV) powertrain applications?

Yes-it is qualified for automotive-grade temperature and EMC requirements applicable to BEV inverters, e-axles, and onboard chargers. Its wide supply range (4.5–24 V), high ESD robustness (±8 kV), and vibration immunity make it suitable for motor speed feedback in traction inverters and gearbox-integrated controllers where magnetic interference and thermal cycling are present.