Infineon Technologies TLE4953CHAMA3

Overview

TLE4953CHAMA3 from Infineon Technologies is a differential Hall-effect transmission speed sensor with integrated 1.8 nF overmolded capacitor, designed for automotive ABS and automatic transmission systems. It delivers rotation speed (0–12 kHz) and direction via two-wire PWM current interface, operates from −40 °C to +150 °C, and features adaptive hysteresis, dynamic self-calibration, and AEC-Q100 qualification.

For engineers reviewing the TLE4953CHAMA3 datasheet, TLE4953CHAMA3 pinout, TLE4953CHAMA3 application, or TLE4953CHAMA3 equivalent, key selection criteria include its differential magnetic sensing architecture, vibration-suppressed calibrated mode, zero-speed detection capability, and integrated EMI filtering - all critical for robust gear tooth and target wheel sensing in harsh under-hood environments.

Technical Context

The TLE4953CHAMA3 implements a monolithic BiCMOS solution with dual Hall plates enabling differential flux density measurement, eliminating mechanical and magnetic offsets up to ±20 mT. Its self-calibration requires only two magnetic transitions and continuously adapts threshold levels using an adaptive hysteresis algorithm.

Direction detection is derived from pulse-width modulation: DR-L (left rotation) and DR-R (right rotation) are encoded in output pulse length relative to the speed signal S. The integrated 1.8 nF X8R ceramic capacitor (rated 50 V) is overmolded between VDD and GND to suppress conducted EMI without external components.

Key Specifications

Pinout & Package

Package: PG-SSO-2-4 (Plastic Single Small Outline, 2-pin, 4.5 mm body width, overmolded capacitor integrated).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE4953CHAMA3, the TLE4953C offers identical performance and form factor, while the base TLE4953 requires external filtering and yields higher board-level EMI risk - making the HAMA3 variant optimal for production-grade automotive modules demanding drop-in reliability.

Availability

TLE4953CHAMA3 is available at Aetrix Electronics and suitable for ABS wheel speed sensing, automatic transmission input shaft monitoring, and hybrid gearbox engagement detection requiring stable component supply across extended automotive lifecycles.

Supply support for TLE4953CHAMA3 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 TLE4953x family targets automotive transmission and chassis control systems, engineered specifically for high-reliability, zero-speed-capable magnetic sensing in thermally aggressive and electromagnetically noisy environments.

FAQ

What is the function of the overmolded 1.8 nF capacitor in TLE4953CHAMA3?

The overmolded 1.8 nF X8R ceramic capacitor is integrated between VDD and GND inside the PG-SSO-2-4 package to provide localized high-frequency decoupling. It suppresses conducted EMI from the PWM current interface, eliminates the need for external capacitors, and ensures compliance with ISO 11452-4 BCI testing without layout-dependent compromises.

How does TLE4953CHAMA3 detect rotation direction?

Direction is encoded in output pulse width: DR-L (left rotation) produces shorter pulses than the base speed signal S, while DR-R (right rotation) produces longer pulses. The IC compares rising-edge timing between differential Hall elements and applies a digital direction algorithm - no external logic or microcontroller interpretation is required.

Can TLE4953CHAMA3 operate with coarse-pitch target wheels?

Yes - it is explicitly qualified for coarse transmission target wheels per Infineon's datasheet. Its large operating air-gap capability (up to 2.5 mm typical), high sensitivity (±20 mT offset cancellation), and adaptive hysteresis enable reliable detection even with low-amplitude, low-frequency magnetic fields from widely spaced gear teeth.

Is TLE4953CHAMA3 compatible with 12 V and 24 V automotive systems?

Yes - it operates across 4.5 V to 24 V supply range and is designed for direct connection to battery rails in both passenger car (12 V) and commercial vehicle (24 V) platforms. Internal regulation and overvoltage protection ensure robustness against load dump transients up to ±40 V per ISO 7637-2.