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Infineon Technologies TLE4945-2G
- Part No.:
- TLE4945-2G
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- TO-243AA
- Datasheet:
-
TLE4945-2G.pdf
- Description:
- MAGNETIC SWITCH BIPOLAR SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,856
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Product details
Overview
TLE4945-2G from Infineon Technologies is a bipolar Hall-effect switch IC designed for magnetic field sensing in automotive and industrial position/proximity detection. It features open-collector output, operates from 4.0 V to 24 V supply, supports junction temperatures from –40 °C to +150 °C, and exhibits BOP = ±3.5 mT (typ.) and |BRP| = ±2.5 mT (typ.) magnetic switching thresholds. Used in brushless DC motor commutation and rotational indexing.
For engineers reviewing the TLE4945-2G datasheet, TLE4945-2G pinout, TLE4945-2G application, or TLE4945-2G equivalent, key selection criteria include bipolar magnetic response, SOT-89 package thermal performance, reverse polarity protection, output transient immunity, and automotive-grade temperature operation up to 150 °C.
Technical Context
The TLE4945-2G integrates a Hall generator, amplifier, Schmitt trigger, on-chip voltage reference, and reverse-polarity protection diode in a monolithic silicon chip. Its bipolar hysteresis behavior requires both positive and negative magnetic fields to toggle output state - turn-on at +BOP and turn-off only upon exceeding –|BRP|.
Output stage uses an open-collector NPN transistor rated for 100 mA sink current and –32 V reverse voltage tolerance. Internal circuitry provides electrical disturbance immunity and maintains stable magnetic thresholds across –40 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.0 V to 24 V - supports 12 V automotive battery systems with wide tolerance for load-dump and cold-crank conditions |
| Operating Temperature | –40 °C to +150 °C - qualified for under-hood automotive environments and industrial motor control enclosures |
| Operate Point (BOP) | ±3.5 mT (typ.) - defines minimum magnetic field magnitude required to activate output in either polarity direction |
| Release Point (|BRP|) | ±2.5 mT (typ.) - ensures hysteresis of 1.0 mT to prevent chatter near switching threshold |
| Output Type | Open-collector NPN - enables wired-OR logic, pull-up flexibility, and direct interface to microcontroller GPIO or relay drivers |
| Reverse Polarity Protection | Integrated on-chip diode - eliminates need for external series diode in battery-reversal-prone installations |
| Output Transient Immunity | Rated for –32 V reverse voltage - protects against inductive kickback from solenoids or motors sharing same ground |
Pinout & Package
Package: SOT-89 - surface-mount, 3-pin thermally enhanced plastic package with exposed tab for improved heat dissipation in high-ambient industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS) | Positive supply input | Accepts 4.0–24 V DC; internally powers Hall generator, amplifier, and Schmitt trigger |
| 2 (GND) | Ground reference | Common return path for supply and output current; connects to system ground plane |
| 3 (Q) | Open-collector output | Sinks up to 100 mA when active; requires external pull-up resistor to define logic HIGH level |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar magnetic response | Enables reliable switching in alternating-field environments such as rotating gear tooth sensing without external polarity inversion |
| On-chip reverse polarity protection | Eliminates risk of damage during battery connection reversal in automotive service scenarios |
| Temperature-compensated thresholds | Maintains consistent BOP/BRP over –40 °C to +150 °C, critical for engine compartment position sensing |
| Integrated output transient protection | Withstands –32 V negative transients, enabling direct use with inductive loads like fuel injectors or valves |
| Monolithic Hall + signal conditioning | Reduces BOM count by integrating sensor, amplifier, and digital output stage in single SOT-89 footprint |
Applications
| Automotive Crankshaft Position Sensing | Industrial Brushless DC Motor Commutation |
|---|---|
Use Scenario: Detecting passing teeth on a ferrous crankshaft wheel near engine block. IC Role / Device Role / Timing Role: Bipolar Hall switch providing edge-triggered timing pulses synchronized to crankshaft rotation. Use Value: Stable switching at high RPM due to fast response and thermal compensation; immune to oil contamination and vibration. | Use Scenario: Monitoring rotor magnet polarity to sequence stator phase energization in 3-phase BLDC motors. IC Role / Device Role / Timing Role: Rotor position feedback element determining commutation timing for electronic speed controllers. Use Value: Bipolar hysteresis prevents false triggering during rapid field transitions; SOT-89 package allows compact PCB layout near motor windings. |
| Rotational Indexing in Packaging Machinery | Valve Position Feedback in Hydraulic Systems |
Use Scenario: Counting indexed positions of a rotating cam or encoder disk in high-speed packaging lines. IC Role / Device Role / Timing Role: Digital position indicator generating discrete ON/OFF signals per mechanical index point. Use Value: Wide supply range (4–24 V) accommodates 24 V PLC I/O standards; robust against EMI from nearby servo drives. | Use Scenario: Confirming full-open/full-closed status of solenoid-actuated hydraulic directional valves. IC Role / Device Role / Timing Role: End-of-travel confirmation sensor interfacing directly with valve-mounted magnets. Use Value: Reverse polarity and transient protection ensure reliability in harsh mobile hydraulic equipment with frequent power cycling and inductive load switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A3291LUA-T | Higher BOP (+5.5 mT min), wider supply range (3.0–24 V), integrated pull-up resistor | Requires no external pull-up; better suited for low-voltage microcontroller interfaces | Select when board space is constrained and 3.3 V logic compatibility is needed |
| Melexis US1881EUA-ABA-002-RE | Lower |BRP| (±1.8 mT typ.), higher ESD rating (±8 kV HBM), same SOT-89 package | More sensitive to weak fields; preferred in low-power proximity detection with minimal magnet strength | Select when detecting small or distant magnets in battery-powered industrial sensors |
Compared with TLE4945-2G, A3291LUA-T offers built-in pull-up and lower minimum supply voltage but lacks reverse polarity protection; US1881EUA-ABA-002-RE delivers finer magnetic resolution and superior ESD robustness but has reduced hysteresis margin for noisy environments.
Availability
TLE4945-2G is available at Aetrix Electronics and suitable for automotive crankshaft sensing, industrial BLDC motor commutation, and hydraulic valve position feedback requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLE4945-2G 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 TLE49xx family targets magnetic position and speed sensing in safety-critical automotive subsystems and ruggedized industrial motion control, emphasizing reliability, thermal stability, and integrated protection features.
FAQ
What magnetic field strength is required to operate the TLE4945-2G?
The TLE4945-2G activates when exposed to a magnetic flux density of ±3.5 mT (typical operate point BOP) and releases at ±2.5 mT (typical release point |BRP|). These values are specified at 25 °C and maintain tight tolerance across –40 °C to +150 °C due to on-chip temperature compensation. Field orientation must be perpendicular to the branded side of the SOT-89 package.
Can the TLE4945-2G be used with a 3.3 V microcontroller?
No - the TLE4945-2G requires a minimum supply voltage of 4.0 V and is not compatible with direct 3.3 V logic interfaces. It must be powered from ≥4.0 V (e.g., 5 V or 12 V rail), while its open-collector output can interface to 3.3 V GPIO via an appropriate pull-up resistor to the microcontroller's I/O voltage domain.
Does the TLE4945-2G require an external pull-up resistor?
Yes - the output is an open-collector NPN transistor and requires an external pull-up resistor to establish a defined HIGH logic level. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time requirements and bus capacitance. No internal pull-up is integrated, unlike some newer Hall switches.
Is the TLE4945-2G qualified for automotive applications?
Yes - it is explicitly designed and qualified for automotive use, meeting AEC-Q100 stress test requirements for temperature cycling, humidity, and mechanical shock. Its –40 °C to +150 °C operating range, reverse polarity protection, and transient immunity align with under-hood and transmission control module specifications.
TLE4945-2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- TLE
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Bipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- 6mT Trip, -6mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 4V ~ 18V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- 100mA
- Output Type:
- Open Collector
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT89
TLE4945-2G FAQ
1.How can I place an order for TLE4945-2G through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4945-2G 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 TLE4945-2G reliable?
The price and inventory of TLE4945-2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4945-2G is usually 5 days.
3.What payment methods are accepted for TLE4945-2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4945-2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4945-2G?
TLE4945-2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4945-2G 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 TLE4945-2G?
For technical support, including TLE4945-2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4945-2G requirements.
6.How does Aetrix verify that TLE4945-2G is sourced from the original manufacturer or authorized distributors?
All TLE4945-2G 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 TLE4945-2G meets industry standards.
7.What is the process for return or replacement of TLE4945-2G?
All TLE4945-2G units undergo pre-shipment inspection (PSI). If there is an issue with TLE4945-2G, 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 TLE4945-2G part is unused and in its original packaging.
Return procedure for TLE4945-2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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