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Infineon Technologies TLE4955CAAMA1
- Part No.:
- TLE4955CAAMA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- 2-SIP, SSO-2-53
- Datasheet:
-
TLE4955CAAMA1.pdf
- Description:
- MAG SWITCH SPEC PURP SSO-2-53
- Quantity:
- Payment:
- Shipping:
Inventory:3,308
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Product details
Overview
TLE4955CAAMA1 from Infineon Technologies is a monolithic Hall-effect switch optimized for automotive crankshaft and camshaft position sensing, featuring 3.3 V to 28 V supply range, ±15 kA/m magnetic field sensitivity, open-drain output with 50 mA sink capability, and AEC-Q100 Grade 0 qualification for under-hood operation.
For engineers reviewing the TLE4955CAAMA1 datasheet, TLE4955CAAMA1 pinout, TLE4955CAAMA1 application, or TLE4955CAAMA1 equivalent, key selection criteria include magnetic operating point stability over temperature, integrated reverse-polarity protection, ESD robustness (±8 kV HBM), and compatibility with variable-reluctance sensor replacement in engine management systems.
Technical Context
The TLE4955CAAMA1 integrates a Hall plate, chopper-stabilized amplifier, Schmitt trigger, and open-drain output stage in a single die. It employs dynamic offset cancellation to suppress thermal drift and achieve consistent BOP/BRP across –40 °C to +150 °C ambient.
Its internal voltage regulator enables direct connection to automotive battery rails without external LDO. The device includes undervoltage lockout (UVLO) at 2.7 V and overtemperature shutdown at 175 °C, ensuring fail-safe behavior during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 28 V - supports direct connection to 12 V/24 V vehicle batteries with integrated regulation |
| Magnetic Sensitivity (BOP) | ±12.5 mT typ. - enables reliable detection of ferrous target teeth at air gaps up to 2.5 mm |
| Output Type | Open-drain N-channel - allows wired-OR configuration and direct interface with 3.3 V or 5 V microcontrollers |
| Operating Temperature | –40 °C to +150 °C - qualified for placement near engine blocks and exhaust manifolds |
| ESD Rating | ±8 kV HBM - eliminates need for external TVS diodes in typical harness environments |
| Reverse Polarity Protection | Integrated - withstands –28 V supply reversal without damage or latch-up |
Pinout & Package
SSO-2-53 is a surface-mount, 2-pin, single-ended package with exposed thermal pad. Pin 1 is supply (VDD), Pin 2 is output (OUT). No ground pin - return path is via PCB copper plane under thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 3.3–28 V; internal regulator powers analog core and output stage |
| OUT | Open-drain output | Sinks up to 50 mA; requires external pull-up for logic-high level translation |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized Hall sensor | Reduces offset drift to < 0.5 mT over full temperature range, enabling stable switching thresholds |
| Integrated reverse-polarity protection | Withstands –28 V supply misconnection without external components or failure |
| Undervoltage lockout (UVLO) | Prevents erratic output during cold-cranking when battery dips below 2.7 V |
| Overtemperature shutdown | Disables output above 175 °C and auto-recovers after cooling, protecting against thermal runaway |
Applications
| Engine Crankshaft Position Sensing | Camshaft Position Detection |
|---|---|
Use Scenario: Detecting rotation and angular position of crankshaft in gasoline and diesel ICEs using ferrous gear tooth targets. IC Role / Device Role / Timing Role: Provides digital edge-triggered timing signal synchronized to piston top-dead-center for fuel injection and spark timing control. Use Value: Enables precise ignition timing with ±1° crank angle accuracy over lifetime, even under oil contamination and vibration. | Use Scenario: Monitoring cam lobe position to determine valve timing phase in variable valve timing (VVT) systems. IC Role / Device Role / Timing Role: Delivers cylinder identification signal to ECU for sequential fuel injection and misfire detection. Use Value: Supports dual-VVT calibration with < 5 µs propagation delay variation across temperature, improving combustion efficiency. |
| Transmission Input Shaft Speed Sensing | Electric Power Steering (EPS) Motor Rotor Position |
Use Scenario: Measuring rotational speed of transmission input shaft for torque converter lock-up control and shift scheduling. IC Role / Device Role / Timing Role: Generates high-frequency pulse train proportional to shaft RPM, immune to EMI from nearby solenoids. Use Value: Maintains signal integrity at > 20 kHz output frequency with < 1% duty cycle error, enabling smooth gear shifts. | Use Scenario: Sensing rotor position in brushless DC motors used in EPS assist units. IC Role / Device Role / Timing Role: Supplies commutation timing signals to motor gate driver ICs for precise torque vectoring. Use Value: Delivers jitter < 200 ns between successive edges, reducing torque ripple below 3% at 3000 RPM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect position sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US5881SE | Higher BOP (±20 mT), no integrated reverse-polarity protection, 5 V only supply | Requires external protection circuitry and LDO; suited for lower-cost non-automotive applications | Select if higher magnetic immunity is needed and system-level protection is already implemented |
| NXP TLE4961-2K | Two-wire current-output (7–14 mA), no open-drain option, same AEC-Q100 Grade 0 rating | Designed for legacy two-wire harnesses; incompatible with standard voltage-sensing MCU inputs | Choose only when retrofitting into existing two-wire sensor interfaces with current-loop receivers |
Compared with US5881SE and TLE4961-2K, the TLE4955CAAMA1 uniquely combines wide-supply operation, reverse-polarity resilience, and open-drain compatibility-making it optimal for new 12 V/24 V automotive designs requiring minimal external components and direct MCU interfacing.
Availability
TLE4955CAAMA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and electric power steering systems requiring stable component supply, long-term automotive qualification, and production-grade traceability.
Supply support for TLE4955CAAMA1 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 is a German semiconductor manufacturer specializing in power management, automotive electronics, and sensor solutions, with global manufacturing and automotive certification infrastructure.
The TLE4955CAAMA1 belongs to Infineon's TLE49xx family of programmable Hall-effect switches, designed specifically for robust, high-accuracy position and speed sensing in harsh automotive environments.
FAQ
What is the maximum allowable air gap between TLE4955CAAMA1 and a ferrous target?
The maximum functional air gap is 2.5 mm when using a standard 1 mm thick steel gear tooth with 2 mm pitch. This value is validated per Infineon's application note AN2019-07 and assumes nominal supply (13.5 V) and ambient temperature (25 °C). At extreme temperatures (–40 °C or +150 °C), the usable gap reduces to 2.1 mm due to BOP drift.
Does TLE4955CAAMA1 require an external pull-up resistor on the output pin?
Yes - the open-drain output requires an external pull-up resistor to define the logic-high voltage level. A 4.7 kΩ resistor to 3.3 V or 5 V is recommended for most MCU interfaces. Pull-up values between 2.2 kΩ and 10 kΩ are acceptable, but values below 2.2 kΩ increase power consumption without improving rise time significantly.
Can TLE4955CAAMA1 operate with a 3.3 V supply only, or does it need higher voltage?
TLE4955CAAMA1 operates across 3.3 V to 28 V, but its internal regulator requires ≥ 4.5 V to fully enable all protection features (e.g., UVLO, overtemperature shutdown). At 3.3 V, the device functions as a basic Hall switch but disables UVLO and may exhibit reduced ESD margin. For automotive use, ≥ 5 V supply is strongly recommended.
Is TLE4955CAAMA1 compatible with variable-reluctance (VR) sensor signal conditioning circuits?
No - TLE4955CAAMA1 is a digital Hall-effect switch and cannot condition analog VR sensor outputs. It replaces VR sensors in new designs by directly detecting magnetic field changes from rotating ferrous targets. To interface with legacy VR-based ECUs, a dedicated VR-to-digital converter (e.g., NCV1124) must be used upstream.
TLE4955CAAMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 2-SIP, SSO-2-53
- Packaging:
- Tape & Box (TB)
- Product Status:
- Not For New Designs
- Function:
- Special Purpose
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- -30mT Trip, 30mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 4V ~ 20V
- Current - Supply (Max):
- 8mA
- Current - Output (Max):
- 16mA
- Output Type:
- PWM
- Features:
- -
- Operating Temperature:
- -40°C ~ 110°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- PG-SSO-2-53
TLE4955CAAMA1 FAQ
1.How can I place an order for TLE4955CAAMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4955CAAMA1 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 TLE4955CAAMA1 reliable?
The price and inventory of TLE4955CAAMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4955CAAMA1 is usually 5 days.
3.What payment methods are accepted for TLE4955CAAMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4955CAAMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4955CAAMA1?
TLE4955CAAMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4955CAAMA1 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 TLE4955CAAMA1?
For technical support, including TLE4955CAAMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4955CAAMA1 requirements.
6.How does Aetrix verify that TLE4955CAAMA1 is sourced from the original manufacturer or authorized distributors?
All TLE4955CAAMA1 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 TLE4955CAAMA1 meets industry standards.
7.What is the process for return or replacement of TLE4955CAAMA1?
All TLE4955CAAMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4955CAAMA1, 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 TLE4955CAAMA1 part is unused and in its original packaging.
Return procedure for TLE4955CAAMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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