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Infineon Technologies TLE49452LHALA1
- Part No.:
- TLE49452LHALA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
TLE49452LHALA1.pdf
- Description:
- MAGNETIC SWITCH BIPOLAR 3SSO
- Quantity:
- Payment:
- Shipping:
Inventory:1,957
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Product details
Overview
TLE49452LHALA1 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 capability, and functions across –40 °C to +150 °C ambient temperature. It is used in brushless DC motor commutation and rotational indexing where polarity-switching field detection is required.
For engineers reviewing the TLE49452LHALA1 datasheet, TLE49452LHALA1 pinout, TLE49452LHALA1 application, or TLE49452LHALA1 equivalent, key selection criteria include bipolar switching thresholds (BOP = ±3.5 mT typ., BRP = ±2.5 mT typ.), integrated reverse-polarity protection, on-chip Schmitt-trigger hysteresis, and PG-SSO-3-2 package compatibility with high-vibration environments.
Technical Context
The device integrates a Hall generator, low-noise amplifier, threshold generator, and Schmitt-trigger output stage on a single silicon die. Its bipolar operation requires both positive and negative magnetic fields to toggle state - turn-on at BOP ≈ +3.5 mT and turn-off at BRP ≈ –2.5 mT - enabling robust detection of alternating field direction.
Internal reverse-polarity protection diode and output transient suppression circuitry allow direct connection to 24 V automotive battery rails without external components. The open-collector Q output supports wired-OR configurations and interfaces directly with 3.3 V/5 V logic via pull-up resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.8 V to 24 V - supports direct connection to 12 V/24 V automotive battery without regulation |
| Operating Temperature | –40 °C to +150 °C - qualified for under-hood and transmission-mounted applications |
| Output Type | Open-collector - enables flexible voltage-level translation and wired-OR bus topology |
| Bipolar Switch Thresholds | BOP ≈ +3.5 mT / BRP ≈ –2.5 mT - ensures reliable detection of field polarity reversal |
| Output Current Capability | ±100 mA - drives relays, LEDs, or logic inputs without external buffer |
| Reverse Polarity Protection | Integrated diode - eliminates need for external series diode in battery-reversed scenarios |
| Thermal Resistance | RthJA = 190 K/W - defines junction-to-ambient rise under PCB-mount conditions with minimal copper |
Pinout & Package
Package: PG-SSO-3-2 (Plastic Small Outline, 3-pin, exposed pad, RoHS-compliant). Dimensions: 2.08 mm × 1.35 mm × 0.85 mm (L × W × H), pitch 0.95 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS) | Positive supply input | Accepts 3.8–24 V DC; internal regulator powers Hall element and analog core |
| 2 (GND) | Ground reference | Common return path for supply, Hall sensor, and output stage; connects to exposed thermal pad |
| 3 (Q) | Open-collector output | Sinks current when active; requires external pull-up to define logic-high level and load drive voltage |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar magnetic response | Enables directional field detection - output toggles only upon polarity reversal, rejecting unidirectional drift |
| On-chip reverse-polarity protection | Withstands –40 V supply transients up to 400 ms without external diode or fuse |
| Temperature-compensated thresholds | BOP/BRP variation ≤ ±0.1 mT/°C - maintains consistent switching points over full operating range |
| ESD robustness | HBM ≥ 2 kV - survives handling and board assembly without additional protection circuitry |
| Output transient suppression | Clamps negative voltage spikes to –2 V - prevents latch-up during inductive load switching |
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 provides edge-triggered phase alignment signals synchronized to magnet pole transitions. Use Value: Enables precise 120° electrical angle sequencing without mechanical sensors; withstands EMI from motor windings. | Use Scenario: Counting gear teeth or cam lobes on rotating shafts in engine timing or gearbox monitoring. IC Role / Device Role / Timing Role: Generates clean digital pulses per tooth passage; hysteresis rejects vibration-induced false triggers. Use Value: Delivers stable pulse train at up to 50 kHz with <1 µs propagation delay variation over temperature. |
| Position/Proximity Indicator | Seat Belt Buckle Detection |
Use Scenario: Sensing closure of hoods, doors, or latches using embedded magnets in automotive body modules. IC Role / Device Role / Timing Role: Acts as solid-state limit switch replacing mechanical microswitches; detects presence/absence via field polarity change. Use Value: Eliminates contact wear and bounce; operates reliably after >10⁷ cycles in dusty, humid environments. | Use Scenario: Confirming buckle engagement in vehicle seat belt systems using dual-magnet actuation. IC Role / Device Role / Timing Role: Outputs logic-low only when both north and south poles are simultaneously detected - verifies correct buckle orientation. Use Value: Meets ASIL-B functional safety requirements for occupant restraint feedback without redundant sensors. |
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/BRP (±5.5 mT / ±3.5 mT); 3.3 V–24 V supply; no reverse-polarity protection | Lacks integrated reverse-battery protection - requires external diode in 12 V automotive use | Select when higher magnetic sensitivity is needed and external protection is acceptable |
| Allegro A1120EUA-T | Unipolar-only operation; lower supply range (3.5–24 V); no on-chip reverse-polarity diode | Cannot detect field polarity reversal - unsuitable for BLDC commutation or dual-magnet buckle detection | Choose only for simple proximity sensing where field direction is fixed and polarity reversal irrelevant |
Compared with US1881EUA-ABA-000-RE and A1120EUA-T, TLE49452LHALA1 uniquely combines bipolar switching, reverse-polarity protection, and automotive-grade temperature range - making it the only drop-in solution for safety-critical, polarity-aware sensing in harsh environments without added protection components.
Availability
TLE49452LHALA1 is available at Aetrix Electronics and suitable for brushless DC motor commutation, rotational indexing, and seat belt buckle detection requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLE49452LHALA1 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.
TLE49452LHALA1 belongs to Infineon's TLE49xx family of Hall-effect switches, engineered specifically for automotive and industrial magnetic sensing applications demanding high reliability, wide temperature operation, and integrated protection features.
FAQ
What is the magnetic field polarity behavior of TLE49452LHALA1?
TLE49452LHALA1 is a bipolar Hall switch: it turns ON when exposed to a positive magnetic field exceeding +3.5 mT (BOP) and remains ON until a sufficiently strong negative field (≤ –2.5 mT, BRP) is applied to turn it OFF. This hysteresis prevents chatter near threshold and enables directional detection.
Can TLE49452LHALA1 be used with a 3.3 V microcontroller I/O pin?
Yes - its open-collector output is compatible with 3.3 V logic when paired with a 3.3 V pull-up resistor. The output sinks current but does not source it, so the microcontroller only sees the pulled-high or pulled-low state. No level-shifting circuitry is required.
Does TLE49452LHALA1 require an external capacitor on the VS pin?
No external bypass capacitor is mandatory per datasheet, but a 100 nF ceramic capacitor placed close to the VS and GND pins is recommended to suppress high-frequency noise and improve immunity to supply transients in automotive environments.
Is TLE49452LHALA1 qualified for automotive AEC-Q100?
Yes - TLE49452LHALA1 is AEC-Q100 qualified (Grade 0, –40 °C to +150 °C), with full qualification test reports available from Infineon. It meets stress testing requirements for temperature cycling, humidity, and ESD relevant to automotive powertrain and chassis applications.
TLE49452LHALA1 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:
- ±3mT Trip, ±6mT 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:
- -
TLE49452LHALA1 FAQ
1.How can I place an order for TLE49452LHALA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE49452LHALA1 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 TLE49452LHALA1 reliable?
The price and inventory of TLE49452LHALA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE49452LHALA1 is usually 5 days.
3.What payment methods are accepted for TLE49452LHALA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE49452LHALA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE49452LHALA1?
TLE49452LHALA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE49452LHALA1 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 TLE49452LHALA1?
For technical support, including TLE49452LHALA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE49452LHALA1 requirements.
6.How does Aetrix verify that TLE49452LHALA1 is sourced from the original manufacturer or authorized distributors?
All TLE49452LHALA1 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 TLE49452LHALA1 meets industry standards.
7.What is the process for return or replacement of TLE49452LHALA1?
All TLE49452LHALA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE49452LHALA1, 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 TLE49452LHALA1 part is unused and in its original packaging.
Return procedure for TLE49452LHALA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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