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Infineon Technologies TLE4941C-HT
- Part No.:
- TLE4941C-HT
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- 2-SIP, SSO-2-2
- Datasheet:
-
TLE4941C-HT.pdf
- Description:
- MAG SWITCH SPEC PURP SSO-2-2
- Quantity:
- Payment:
- Shipping:
Inventory:4,145
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Product details
Overview
TLE4941C-HT from Infineon Technologies is a smart Hall effect sensor IC designed for active wheel speed sensing in automotive ABS and transmission systems. It features differential Hall probes (2.5 mm spacing), dynamic self-calibration, 1.8 nF integrated overmoulded capacitor for EMC robustness, operates from 4.5–20 V, and delivers square-wave output across 1–5000 Hz frequency range.
For engineers reviewing the TLE4941C-HT datasheet, TLE4941C-HT pinout, TLE4941C-HT application, or TLE4941C-HT equivalent, key selection criteria include its two-wire current interface, <1.5 mT minimum flux density sensitivity, <2% jitter, <1 ms power-on time, and PG-SSO-2-2 ultra-thin package suitability for harsh under-hood environments.
Technical Context
The TLE4941C-HT implements a fully integrated signal chain: dual Hall probes feed a low-noise differential amplifier with programmable gain, followed by a comparator and switched-current output stage. An on-chip DSP-based offset cancellation loop continuously tracks and nulls magnetic and device offsets within a few magnetic transitions.
Its two-wire interface uses current modulation (7 mA low / 14 mA high) to encode speed information without external components. The integrated 1.8 nF capacitor suppresses high-frequency noise, enabling reliable operation in electrically noisy automotive environments up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 4.5–20 V: Supports direct battery connection with wide undervoltage/overvoltage tolerance in 12 V automotive systems. |
| Output Interface | Two-wire current sink: 7 mA (LOW) / 14 mA (HIGH); eliminates need for external pull-up or signal conditioning circuitry. |
| Frequency Range | 1–5000 Hz: Covers full operational speed range from parking to highway for wheel and transmission shaft sensing. |
| Min. ΔB Sensitivity | <1.5 mT: Enables detection of small magnetic field changes from standard ferrous toothed wheels with back-bias magnets. |
| Jitter | <2%: Ensures precise edge timing for accurate speed and direction calculation in ABS control algorithms. |
| Power-On Time | <1 ms: Allows immediate signal availability after ignition, critical for fast system startup in safety-critical applications. |
| Operating Temperature | −40 to +150 °C: Qualified for under-hood placement adjacent to brake calipers or gearboxes without derating. |
Pinout & Package
Package: PG-SSO-2-2 - ultra-thin, surface-mount, 2-pin single-sided leadframe package optimized for high-temperature automotive mounting and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC/OUT | Supply input & current-output node | Single terminal supplies power and carries modulated output current (7/14 mA); requires external load resistor to ground for voltage interpretation. |
| GND | Reference return path | Provides common reference for internal circuitry and completes current loop; must be low-impedance connection to vehicle chassis ground. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall sensing | 2.5 mm spaced probes reject common-mode magnetic interference and enable robust tooth-edge detection on rotating targets. |
| Dynamic self-calibration | DSP-driven offset cancellation adapts in real time to thermal drift and mechanical stress, eliminating manual calibration or trimming. |
| Integrated 1.8 nF capacitor | Overmoulded ceramic capacitor directly bonded to die improves EMC immunity without requiring PCB layout space or external component placement. |
| South/North pole pre-induction | Configurable magnetic polarity detection supports flexible magnet orientation during assembly-no retooling needed for left/right axle variants. |
| Single-chip solution | Full analog front-end, digital processing, and output driver integrated into one die-no external resistors, capacitors, or regulators required. |
Applications
| ABS Wheel Speed Sensing | Automatic Transmission Input Shaft Speed |
|---|---|
Use Scenario: Mounted adjacent to rotating ABS tone ring on vehicle wheel hub, detecting tooth passage under vibration, water, and thermal cycling. IC Role / Device Role / Timing Role: Provides precise zero-crossing timing of magnetic field changes to compute rotational speed and direction for ECU-based slip control. Use Value: <2% jitter and <1 ms wake-up ensure millisecond-level response for emergency braking interventions without false triggering. | Use Scenario: Installed on transmission housing to monitor input shaft rotation during gear shifts and torque converter lock-up events. IC Role / Device Role / Timing Role: Delivers high-fidelity speed pulses to transmission control unit for adaptive shift scheduling and clutch engagement timing. Use Value: −40 to +150 °C operation and integrated EMC capacitor maintain signal integrity despite proximity to high-current solenoids and gearbox heat. |
| Electric Power Steering Motor Rotor Position | Driveline Differential Speed Monitoring |
Use Scenario: Embedded in EPS motor housing to sense rotor position via embedded magnets for field-oriented control commutation. IC Role / Device Role / Timing Role: Generates synchronized speed pulses used by motor controller to align stator current phase with rotor magnetic field. Use Value: Differential Hall architecture rejects stray fields from nearby motor windings, ensuring accurate commutation even at standstill. | Use Scenario: Paired sensors on front/rear propshafts or axle carriers to detect speed differentials indicating traction loss or driveline binding. IC Role / Device Role / Timing Role: Supplies independent, time-aligned speed data streams to vehicle dynamics controller for torque vectoring decisions. Use Value: Two-wire interface simplifies harness routing across moving joints; <1.5 mT sensitivity enables use with compact, low-strength magnets in space-constrained locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active wheel speed sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis MLX90242 | Three-wire voltage output; higher supply voltage range (3.3–24 V); no integrated capacitor. | Requires external RC filter for EMC; better suited for systems with dedicated ground-return wiring. | Select when board-level filtering is preferred or when voltage-output compatibility with existing MCU inputs is required. |
| NXP TLE4922 | Two-wire interface like TLE4941C-HT but lacks integrated capacitor; lower max frequency (3 kHz). | Needs external 1–2.2 nF capacitor for comparable EMC performance; limited to mid-speed transmission applications. | Choose for cost-sensitive designs where full 5 kHz bandwidth and highest EMC robustness are not mandatory. |
Compared with MLX90242 and TLE4922, the TLE4941C-HT uniquely combines two-wire simplicity, integrated 1.8 nF EMC capacitor, and 5 kHz capability-making it optimal for next-generation ABS modules requiring minimal BOM count and maximum under-hood reliability.
Availability
TLE4941C-HT is available at Aetrix Electronics and suitable for automotive ABS systems, automatic transmission speed monitoring, electric power steering rotor sensing, and driveline differential speed measurement requiring stable component supply across extended temperature and high-EMI conditions.
Supply support for TLE4941C-HT 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 microcontrollers, and sensor solutions for safety-critical systems.
The TLE4941C-HT belongs to Infineon's Smart Hall Sensor product line, engineered specifically for contactless, high-precision rotational speed detection in demanding automotive environments where reliability, temperature resilience, and EMC immunity are non-negotiable.
FAQ
What is the function of the integrated 1.8 nF capacitor in the TLE4941C-HT?
The 1.8 nF capacitor is overmoulded directly onto the die and functions as a high-frequency bypass filter for the internal regulator and signal path. It suppresses conducted and radiated noise above 10 MHz, significantly improving electromagnetic compatibility without requiring external components or PCB layout area-critical for compact ABS sensor modules mounted near braking systems.
How does the dynamic self-calibration work without external intervention?
The TLE4941C-HT uses an on-chip DSP and feedback DAC to continuously monitor Hall probe offsets during magnetic transitions. Within 2–3 tooth edges, it calculates and injects compensating current to null both magnetic hysteresis and temperature-induced drift-no factory calibration, trim resistors, or software initialization is needed.
Can the TLE4941C-HT detect both north and south magnetic poles?
Yes-the device supports configurable pre-induction for either north or south magnetic pole activation via external magnet orientation during installation. This allows identical hardware to be used on left/right wheel hubs or front/rear axles without firmware or part number changes.
Is the TLE4941C-HT pin-compatible with the standard TLE4941?
No-while both use PG-SSO-2 packages, the TLE4941C-HT is the high-temperature qualified variant (AEC-Q100 Grade 0, −40 to +150 °C), whereas the base TLE4941 is rated to +125 °C. The C-HT version includes enhanced process and test screening but shares identical pinout, electrical behavior, and functional interface with the standard TLE4941.
TLE4941C-HT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- TLE
- Package/Case:
- 2-SIP, SSO-2-2
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Function:
- Special Purpose
- Technology:
- Hall Effect
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- 4.5V ~ 20V
- Current - Supply (Max):
- 16.8mA
- Current - Output (Max):
- -
- Output Type:
- Current Source
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- PG-SSO-2-2
TLE4941C-HT FAQ
1.How can I place an order for TLE4941C-HT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4941C-HT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLE4941C-HT reliable?
The price and inventory of TLE4941C-HT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4941C-HT is usually 5 days.
3.What payment methods are accepted for TLE4941C-HT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4941C-HT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4941C-HT?
TLE4941C-HT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4941C-HT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLE4941C-HT?
For technical support, including TLE4941C-HT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4941C-HT requirements.
6.How does Aetrix verify that TLE4941C-HT is sourced from the original manufacturer or authorized distributors?
All TLE4941C-HT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLE4941C-HT meets industry standards.
7.What is the process for return or replacement of TLE4941C-HT?
All TLE4941C-HT units undergo pre-shipment inspection (PSI). If there is an issue with TLE4941C-HT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLE4941C-HT part is unused and in its original packaging.
Return procedure for TLE4941C-HT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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