My Inquiry
My Account
Infineon Technologies TLE4945LHALA1
- Part No.:
- TLE4945LHALA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
TLE4945LHALA1.pdf
- Description:
- MAGNETIC SWITCH BIPOLAR 3SSO
- Quantity:
- Payment:
- Shipping:
Inventory:1,216
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLE4945LHALA1 from Infineon Technologies is a bipolar Hall-effect switch IC designed for magnetic field sensing in automotive and industrial systems. It features open-collector output, operates from 3.8 V to 24 V supply, delivers ±100 mA output current, and functions across –40 °C to +150 °C. Used in brushless DC motor commutation and rotational indexing where polarity reversal detection is required.
For engineers reviewing the TLE4945LHALA1 datasheet, TLE4945LHALA1 pinout, TLE4945LHALA1 application, or TLE4945LHALA1 equivalent, key selection criteria include bipolar magnetic switching thresholds (BOP = ±3.5 mT typ., BRP = ∓2.5 mT typ.), integrated reverse-polarity protection, output transient immunity, and PG-SSO-3-2 package compatibility with high-temperature PCB layouts.
Technical Context
The TLE4945LHALA1 integrates a Hall generator, chopper-stabilized amplifier, Schmitt trigger, and on-chip voltage reference in a single die. Its bipolar hysteresis enables reliable switching under alternating magnetic fields without false triggering during field decay.
Internal reverse-polarity protection diode and output clamping circuitry suppress negative transients up to –32 V and limit output current to ±100 mA, enabling direct connection to inductive loads without external protection components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.8 V to 24 V - supports 12 V/24 V automotive battery rails with margin for load dump and cold-crank conditions |
| Operating Temperature | –40 °C to +150 °C - qualified for under-hood and transmission-mounted applications |
| Output Type | Open-collector NPN - allows wired-OR logic and flexible pull-up configuration at system level |
| Bipolar Switching Thresholds | BOP = ±3.5 mT typ., BRP = ∓2.5 mT typ. - enables robust detection of magnet polarity reversal in rotary encoders |
| Output Current Rating | ±100 mA - drives small relays, LEDs, or logic inputs directly without external buffer |
| Reverse Polarity Protection | Integrated diode - eliminates need for external series diode in battery-reversed environments |
| ESD Robustness | HBM ≥ 2 kV - meets automotive component-level ESD requirements per ISO 10605 |
Pinout & Package
Package: PG-SSO-3-2 (Plastic Small Outline, 3-pin, exposed pad, RoHS-compliant). Dimensions: 2.08 mm × 1.35 mm × 0.9 mm, pitch 0.95 mm. Exposed thermal pad enhances heat dissipation in high-ambient environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS) | Positive supply input | Accepts 3.8–24 V DC; internal regulator powers Hall element and analog front-end |
| 2 (GND) | Ground reference | Common return path for supply and output; connects to exposed thermal pad for thermal and electrical grounding |
| 3 (Q) | Open-collector output | Sinks current when active; requires external pull-up; compatible with 3.3 V/5 V/12 V logic interfaces |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar magnetic response | Detects both North and South pole approach with defined operate/release hysteresis - essential for direction-sensitive rotation sensing |
| Temperature-compensated thresholds | BOP/BRP drift < ±0.1 mT/°C - maintains consistent switching points across full operating temperature range |
| Integrated reverse-polarity protection | Withstands –40 V supply reversal for <400 ms - eliminates risk of damage during service or jump-start events |
| Output transient suppression | Clamps negative spikes to –32 V and limits sink current to 100 mA - protects against inductive kickback from solenoids or motors |
| Chopper-stabilized amplifier | Reduces offset drift and 1/f noise - improves long-term stability in low-speed position detection |
Applications
| Brushless DC Motor Commutation | Rotational Indexing |
|---|---|
Use Scenario: Detecting rotor magnet position in 3-phase BLDC motors for electronic commutation timing. IC Role / Device Role / Timing Role: Bipolar Hall switch providing synchronized edge-triggered signals to MCU timer inputs for phase alignment. Use Value: Enables precise 60° or 120° electrical angle sampling with minimal latency and no external biasing components. | Use Scenario: Counting gear teeth or cam lobes on rotating shafts in engine management or transmission control units. IC Role / Device Role / Timing Role: Magnetic proximity detector generating clean digital pulses per tooth passage for RPM and position calculation. Use Value: Delivers jitter-free pulse trains even at low speeds (<1 rpm) due to stable hysteresis and temperature compensation. |
| Seat Belt Buckle Detection | Valve Position Feedback |
Use Scenario: Sensing buckle engagement via embedded magnet in automotive seat belt assemblies. IC Role / Device Role / Timing Role: Unidirectional proximity switch activated by magnet presence; latched state indicates secure fastening. Use Value: Meets ASIL-B functional safety readiness with fail-safe open-collector output and reverse-voltage resilience. | Use Scenario: Monitoring linear or rotary actuator position in pneumatic/hydraulic valve control modules. IC Role / Device Role / Timing Role: End-of-travel or mid-stroke position indicator using magnet-actuated bipolar switching. Use Value: Eliminates mechanical switches prone to contact wear; supports IP67-rated sealed housing designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US1881EUA-ABA-000-RE | Higher BOP (±5 mT), lower supply range (2.7–24 V), no integrated reverse-polarity protection | Requires external reverse-battery diode; better suited for low-power portable systems than under-hood automotive | Select when lower quiescent current (<4 mA) and wider supply flexibility outweigh need for built-in polarity protection |
| Allegro A1120ELHLT-T | Unipolar only, BOP = 2.5 mT, no BRP specification, TO-92 package | Lacks bipolar hysteresis; unsuitable for direction-sensing or alternating-field applications | Only consider for cost-sensitive unipolar proximity tasks where polarity reversal is not present |
Compared with US1881EUA-ABA-000-RE and A1120ELHLT-T, the TLE4945LHALA1 uniquely combines bipolar operation, reverse-polarity hardening, and automotive-grade thermal performance in a surface-mount SSO package-making it the sole choice for robust, polarity-aware sensing in harsh environments.
Availability
TLE4945LHALA1 is available at Aetrix Electronics and suitable for brushless DC motor commutation, rotational indexing, seat belt buckle detection, and valve position feedback requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLE4945LHALA1 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 field sensing in automotive powertrain, chassis, and body electronics, emphasizing reliability, temperature stability, and integration of protection features for direct use in demanding environments.
FAQ
What is the magnetic sensitivity polarity behavior of the TLE4945LHALA1?
The TLE4945LHALA1 is a bipolar Hall switch: it turns ON when a sufficient North-pole field exceeds BOP (+3.5 mT typ.) and remains ON until a South-pole field exceeding BRP (–2.5 mT typ.) forces it OFF. This hysteresis prevents chatter near zero field and enables direction discrimination in rotating systems.
Can the TLE4945LHALA1 drive an LED directly without a current-limiting resistor?
No. Although its output can sink up to 100 mA, a series current-limiting resistor is mandatory to set safe LED current and prevent thermal overstress. For example, with a 12 V supply and red LED (VF ≈ 2 V), a 100 Ω resistor limits current to ~100 mA - but continuous operation at max rating requires thermal derating per ambient conditions.
Is the exposed pad on the PG-SSO-3-2 package electrically connected?
Yes - the exposed thermal pad is internally connected to GND (Pin 2). It must be soldered to a PCB copper pour tied to system ground for optimal thermal performance and EMI suppression. Floating or insulated mounting degrades junction temperature rise and may cause premature failure above 105 °C ambient.
Does the TLE4945LHALA1 require an external pull-up resistor on the Q output?
Yes - the Q pin is an open-collector NPN output and cannot source current. A pull-up resistor to VS or another logic rail is required to establish a valid HIGH state. Typical values range from 1 kΩ (for fast switching with capacitive loads) to 10 kΩ (for low-power standby); value selection depends on rise time, power budget, and bus capacitance.
TLE4945LHALA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Last Time Buy
- Function:
- Bipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±6mT Trip, ±10mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3.8V ~ 24V
- Current - Supply (Max):
- 8mA
- Current - Output (Max):
- 100mA
- Output Type:
- Open Collector
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
TLE4945LHALA1 FAQ
1.How can I place an order for TLE4945LHALA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4945LHALA1 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 TLE4945LHALA1 reliable?
The price and inventory of TLE4945LHALA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4945LHALA1 is usually 5 days.
3.What payment methods are accepted for TLE4945LHALA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4945LHALA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4945LHALA1?
TLE4945LHALA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4945LHALA1 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 TLE4945LHALA1?
For technical support, including TLE4945LHALA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4945LHALA1 requirements.
6.How does Aetrix verify that TLE4945LHALA1 is sourced from the original manufacturer or authorized distributors?
All TLE4945LHALA1 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 TLE4945LHALA1 meets industry standards.
7.What is the process for return or replacement of TLE4945LHALA1?
All TLE4945LHALA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4945LHALA1, 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 TLE4945LHALA1 part is unused and in its original packaging.
Return procedure for TLE4945LHALA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLE4945LHALA1 Tags
-
TCS40DLR,LF
Toshiba Semiconductor and Storage
-
DRV5032FBDBZR
Texas Instruments
-
DRV5032FADBZR
Texas Instruments
-
AH1912-FA-7
Diodes Incorporated
-
AH1913-W-7
Diodes Incorporated
-
AH1911-W-7
Diodes Incorporated
-
TLI49631MXTSA1
Infineon Technologies
-
SM453R
Honeywell Sensing and Productivity Solutions
-
MLX90248ESE-EBA-000-RE
Melexis Technologies NV
-
MLX92213ELD-AAA-000-RE
Melexis Technologies NV
-
TLE4913HTSA1
Infineon Technologies
-
US5781ESE-AAA-000-RE
Melexis Technologies NV
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
