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Infineon Technologies TLE4941-HT
- Part No.:
- TLE4941-HT
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- 2-SIP, SSO-2-2
- Datasheet:
-
TLE4941-HT.pdf
- Description:
- MAG SWITCH SPEC PURP SSO-2-2
- Quantity:
- Payment:
- Shipping:
Inventory:3,378
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Product details
Overview
TLE4941-HT from Infineon Technologies is a smart differential Hall effect sensor IC designed for active wheel speed sensing in automotive ABS and transmission systems. It features a 2.5 mm hall probe spacing, <1.5 mT minimum magnetic flux density detection, 1–5000 Hz frequency range, and operates from 4.5–20 V over −40 to +150 °C. Its two-wire current interface enables direct integration into vehicle speed-sensing circuits without external components.
For engineers reviewing the TLE4941-HT datasheet, TLE4941-HT pinout, TLE4941-HT application, or TLE4941-HT equivalent, key selection criteria include differential magnetic field rejection, dynamic self-calibration behavior, jitter performance (<2%), ultra-thin PG-SSO-2-2 package compatibility, and high-temperature operation up to +150 °C in under-hood environments.
Technical Context
The TLE4941-HT implements a fully integrated signal path comprising two Hall probes spaced 2.5 mm apart, a low-noise differential amplifier with noise-limiting low-pass filtering, and a comparator driving a switched-current output stage. Offset cancellation is achieved via an on-chip A/D converter, digital signal processor (DSP), and offset DAC feedback loop.
This architecture enables robust operation in high-EMI automotive environments by rejecting common-mode magnetic offsets and enabling South/North pole pre-induction. The device delivers square-wave speed signals with <2% jitter and power-on time under 1 ms, supporting real-time wheel speed monitoring in closed-loop braking control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 4.5–20 V: Supports wide automotive battery voltage range including cold-crank transients. |
| Frequency Range | 1–5000 Hz: Covers wheel speeds from ~0.1 km/h to >250 km/h at standard gear tooth counts. |
| Min ΔB Detection | <1.5 mT: Enables reliable sensing with small target magnets or large air gaps in compact assemblies. |
| Jitter | <2%: Ensures precise edge timing for accurate wheel acceleration/deceleration calculation in ABS algorithms. |
| Operating Temperature | −40 to +150 °C: Qualified for placement near brake calipers or transmission housings without derating. |
| Supply Current (L/H) | 7/14 mA: Low quiescent current in idle state reduces system power load during vehicle standstill. |
Pinout & Package
Package: PG-SSO-2-2 - ultra-thin, surface-mount, 2-pin single-sided leadframe package optimized for high-temperature automotive mounting and minimal PCB footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | Accepts 4.5–20 V; internal regulator powers analog/digital blocks and provides ESD protection. |
| GND | Return path | Common reference for Hall probes, amplifier, and current-output stage; tied to chassis ground in vehicle harness. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall probe pair | 2.5 mm spacing rejects common-mode magnetic interference from stray fields and mechanical vibration. |
| Dynamic self-calibration | Real-time offset cancellation within few magnetic transitions eliminates need for factory calibration or trimming. |
| Two-wire current interface | Switches between 7 mA (LOW) and 14 mA (HIGH) states-no external pull-up or signal conditioning required. |
| Integrated 1.8 nF capacitor (C-version) | Overmoulded capacitor suppresses high-frequency EMC noise without discrete component placement or layout sensitivity. |
Applications
| ABS Wheel Speed Sensing | Transmission Input/Output Speed Sensing |
|---|---|
Use Scenario: Monitoring rotational speed of individual wheels during braking events in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Differential Hall sensor providing zero-speed-capable, jitter-controlled square-wave output synchronized to gear tooth passage. Use Value: Enables precise slip ratio calculation for hydraulic pressure modulation in anti-lock braking control loops. | Use Scenario: Measuring input shaft and output shaft rotation in automatic and dual-clutch transmissions for shift timing and torque management. IC Role / Device Role / Timing Role: High-temperature-stable magnetic speed detector delivering clean edge timing to transmission control unit (TCU). Use Value: Supports fast, smooth gear shifts by feeding accurate shaft speed differentials to predictive shift algorithms. |
| Electric Power Steering (EPS) Motor Rotor Position | Driveline Torque Estimation via Dual-Speed Monitoring |
Use Scenario: Detecting rotor position in brushless EPS motor commutation where space constraints limit magnet size and air gap. IC Role / Device Role / Timing Role: Compact, high-sensitivity Hall sensor enabling low-latency rotor angle estimation using differential flux detection. Use Value: Allows accurate sinusoidal or trapezoidal commutation without encoder, reducing cost and improving reliability in steering actuation. | Use Scenario: Simultaneous measurement of input and output shaft speeds across a driveline coupling to infer torque transfer. IC Role / Device Role / Timing Role: Paired TLE4941-HT sensors delivering synchronized speed pulses to calculate angular velocity difference across gearbox or differential. Use Value: Enables real-time torque estimation for traction control and all-wheel-drive torque vectoring without strain gauges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential Hall speed sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis MLX90242 | Single-ended Hall output; no integrated self-calibration DSP; requires external RC filter. | Limited to lower-EMI environments; not qualified for direct caliper mounting due to −40 to +125 °C rating. | Preferred where cost sensitivity outweighs high-temp or jitter requirements. |
| NXP TLE4922 | Monolithic Hall switch (not differential); fixed threshold; no dynamic offset cancellation. | Suitable only for coarse speed detection with large, stable air gaps; fails under thermal drift or magnet aging. | Select only for non-safety-critical auxiliary speed monitoring with relaxed accuracy. |
Compared with MLX90242 and TLE4922, the TLE4941-HT uniquely combines differential sensing, on-the-fly offset cancellation, and full AEC-Q100 Grade 0 qualification (−40 to +150 °C), making it the only option validated for primary ABS wheel speed channels in modern braking ECUs.
Availability
TLE4941-HT is available at Aetrix Electronics and suitable for automotive braking systems, transmission control units, and electric power steering modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLE4941-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 TLE4941-HT belongs to Infineon's Smart Hall Sensor product line, engineered specifically for high-reliability, zero-speed-capable wheel and shaft speed detection in automotive chassis control applications.
FAQ
What is the purpose of the differential Hall probe spacing in the TLE4941-HT?
The 2.5 mm spacing between Hall elements enables rejection of uniform magnetic fields and mechanical vibrations while amplifying the gradient signal from passing gear teeth. This improves signal-to-noise ratio and eliminates false triggering caused by stray fields or thermal drift, critical for ABS stability at low speeds.
Does the TLE4941-HT require external capacitors or resistors for basic operation?
No. The TLE4941-HT is a fully integrated two-wire solution: its internal regulator, self-calibration logic, and current-output stage eliminate need for external passive components. The C-version includes a 1.8 nF overmoulded capacitor for EMC suppression, further removing board-level filtering requirements.
How does dynamic self-calibration work in the TLE4941-HT?
During initial magnetic transitions, the on-chip A/D converter samples Hall voltage, the DSP computes offset drift, and the D/A converter injects compensating current into the Hall bias path. This closed-loop correction occurs within 2–3 tooth passes and continuously adapts to temperature-induced offset shifts without interrupting output.
Can the TLE4941-HT detect both North and South magnetic poles?
Yes. The TLE4941-HT supports South and North pole pre-induction, meaning it can initiate switching on either magnetic polarity transition. This allows flexible magnet orientation in constrained packaging layouts and accommodates bidirectional rotation sensing without hardware modification.
TLE4941-HT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- TLE
- Package/Case:
- 2-SIP, SSO-2-2
- Packaging:
- Bulk
- 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
TLE4941-HT FAQ
1.How can I place an order for TLE4941-HT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4941-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 TLE4941-HT reliable?
The price and inventory of TLE4941-HT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4941-HT is usually 5 days.
3.What payment methods are accepted for TLE4941-HT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4941-HT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4941-HT?
TLE4941-HT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4941-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 TLE4941-HT?
For technical support, including TLE4941-HT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4941-HT requirements.
6.How does Aetrix verify that TLE4941-HT is sourced from the original manufacturer or authorized distributors?
All TLE4941-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 TLE4941-HT meets industry standards.
7.What is the process for return or replacement of TLE4941-HT?
All TLE4941-HT units undergo pre-shipment inspection (PSI). If there is an issue with TLE4941-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 TLE4941-HT part is unused and in its original packaging.
Return procedure for TLE4941-HT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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