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Infineon Technologies TLE49681LHALA1
- Part No.:
- TLE49681LHALA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- 3-SSIP, SSO-3-02
- Datasheet:
-
TLE49681LHALA1.pdf
- Description:
- MAGNETIC SWITCH BIPOLAR SSO-3-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,538
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Product details
Overview
TLE49681LHALA1 from Infineon Technologies is a bipolar Hall effect switch optimized for high-precision rotor position and speed sensing in automotive BLDC motors and transmission systems. It operates from 3.0 V to 32 V supply, features ±1 mT magnetic thresholds (BOP/BRP), 0.35 µs typical output jitter, and is qualified to AEC-Q100 Grade 0 (−40°C to +170°C).
For engineers reviewing the TLE49681LHALA1 datasheet, TLE49681LHALA1 pinout, TLE49681LHALA1 application, or TLE49681LHALA1 equivalent, this device delivers stable zero-field switching behavior, integrated overtemperature/overcurrent protection, and load-dump resilience up to 42 V - critical for under-hood engine control and gearbox position sensing.
Technical Context
The TLE49681LHALA1 implements a spinning Hall probe with chopper-stabilized amplifier and demodulator to suppress offset drift and enhance thermal stability of magnetic thresholds. Its comparator includes hysteresis (BHys = 2 mT typ.) and is driven by a precision voltage regulator and oscillator-based sequencer.
It uses an open-drain NMOS output stage with internal current limiting and saturation voltage monitoring, enabling direct interface to 5 V or 12 V pull-up networks without external components. Reverse polarity protection (−18 V) and ESD robustness (±8 kV HBM) are built-in per AEC-Q100 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 32 V - supports direct connection to unregulated automotive battery rails including cold-crank (3 V) and load-dump (42 V with internal clamping) |
| Magnetic Operating Point (BOP) | +1.0 mT (typ.) at 25°C - enables reliable detection of weak magnetic fields near zero Gauss, essential for camshaft and BLDC rotor sensing |
| Magnetic Release Point (BRP) | −1.0 mT (typ.) at 25°C - ensures clean bipolar switching with symmetric hysteresis around null field |
| Output Jitter | 0.35 µs (typ.) - minimizes timing uncertainty in high-speed position decoding (e.g., >20,000 RPM crankshaft sensing) |
| Operating Temperature | −40°C to +170°C - validated for placement near engines, transmissions, and powertrain modules without derating |
| ESD Robustness | ±8 kV HBM - eliminates need for external TVS in most automotive PCB layouts |
| Supply Current | 1.6 mA (typ.) at 25°C - enables low-power operation in always-on vehicle subsystems |
Pinout & Package
Delivered in the PG-SSO-3-2 leaded surface-mount package (3-pin, 2.08 mm × 1.35 mm body, 0.65 mm pitch), optimized for high-temperature reflow and mechanical reliability in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Positive supply input | Accepts 3–32 V DC; internally clamps transients up to 42 V; reverse-polarity protected to −18 V |
| 2 - GND | Ground reference | Return path for supply and output current; serves as substrate reference for Hall sensor biasing |
| 3 - Q | Open-drain output | Sinks up to 20 mA; requires external pull-up; compatible with 3.3 V, 5 V, or 12 V logic systems |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized Hall sensing | Reduces offset drift to <±0.1 mT over temperature, enabling stable zero-field switching across full AEC-Q100 range |
| Integrated overtemperature protection | Shuts down output above 180°C junction temp and auto-recovers - prevents latch-up during thermal overload |
| Load-dump tolerant design | Withstands ISO 7637-2 Pulse 5a (42 V, 400 ms) without external Zener or TVS diode |
| Active error compensation | Real-time correction of supply ripple and thermal gradients on magnetic thresholds - improves repeatability in noisy power domains |
| Bipolar switching symmetry | BOP and BRP match within ±0.2 mT over −40°C to +150°C - ensures consistent hysteresis and avoids false triggers near field null |
Applications
| BLDC Motor Rotor Position Sensing | Engine Camshaft Position Detection |
|---|---|
Use Scenario: Detecting magnet pole transitions on rotating BLDC motor rotors for six-step commutation control. IC Role / Device Role / Timing Role: Bipolar Hall switch providing edge-aligned digital position signals synchronized to rotor angular position. Use Value: ±1 mT thresholds enable accurate zero-crossing detection even with low-strength ferrite magnets and air-gap variations up to 2.5 mm. |
Use Scenario: Monitoring cam lobe passage in gasoline/diesel engines to determine valve timing and synchronize fuel injection. IC Role / Device Role / Timing Role: High-temperature Hall switch generating precise crank/cam correlation pulses for ECU timing alignment. Use Value: 170°C ambient rating allows direct mounting on cylinder heads; low jitter ensures <±0.5° crank angle error at 6000 RPM. |
| Transmission Gear Position Sensing | Electric Power Steering (EPS) Motor Commutation |
Use Scenario: Identifying gear selector position via ferrous target movement in automatic transmission valve bodies. IC Role / Device Role / Timing Role: Contactless magnetic switch converting mechanical gear state into discrete logic-level outputs. Use Value: Reverse polarity and load-dump protection eliminate need for external protection circuitry in harsh transmission control units. |
Use Scenario: Providing rotor position feedback for brushless assist motor in column- or rack-mounted EPS systems. IC Role / Device Role / Timing Role: High-reliability Hall switch delivering synchronized commutation signals under continuous vibration and thermal cycling. Use Value: AEC-Q100 qualification and 170°C operation ensure uninterrupted torque assist during extended highway driving at high ambient temperatures. |
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 US1881 | Wider BOP/BRP spread (±3.5 mT), no internal load-dump clamping, max 150°C ambient rating | Limited to lower-temperature chassis applications; requires external 42 V transient suppression | Prefer when cost sensitivity outweighs under-hood thermal margin and transient robustness |
| Allegro A1120EUA-T | Unipolar operation only (BOP = +5.5 mT, BRP = 0 mT), no reverse polarity protection, 150°C max junction | Cannot support true zero-field bipolar switching; unsuitable for camshaft null-point detection | Select only for simple proximity detection where field polarity reversal is not required |
Compared with US1881 and A1120EUA-T, the TLE49681LHALA1 uniquely combines symmetric ±1 mT thresholds, 170°C operation, and integrated 42 V load-dump tolerance - making it the only choice for high-accuracy, high-temperature, bipolar position sensing in powertrain ECUs.
Availability
TLE49681LHALA1 is available at Aetrix Electronics and suitable for BLDC motor control, engine camshaft sensing, and transmission gear position detection requiring stable component supply across automotive production lifecycles.
Supply support for TLE49681LHALA1 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 ICs, and sensor solutions, with global manufacturing and AEC-Q100 validation infrastructure.
The TLE49681LHALA1 belongs to Infineon's TLE496x family of high-precision bipolar Hall switches, engineered specifically for demanding automotive powertrain and chassis position sensing where thermal stability and transient immunity are non-negotiable.
FAQ
What is the maximum allowable supply voltage transient the TLE49681LHALA1 can withstand?
The TLE49681LHALA1 sustains 42 V transients per ISO 7637-2 Pulse 5a (load-dump) for up to 400 ms without external protection. This is achieved via internal clamp circuitry tied to the VDD pin. Operation beyond 42 V or longer durations risks permanent damage, and the absolute maximum rating remains 42 V per datasheet Section 3.2.
Does the TLE49681LHALA1 require an external pull-up resistor on the Q output?
Yes - the Q pin is an open-drain NMOS output and must be pulled up to a valid logic voltage (3.3 V, 5 V, or 12 V). The datasheet recommends a 4.7 kΩ resistor for 12 V systems. No internal pull-up is present; omitting the external resistor results in undefined logic states and inability to drive downstream logic.
How does the TLE49681LHALA1 achieve low jitter in high-noise automotive environments?
It combines chopper stabilization of the Hall element, on-chip low-pass filtering before the comparator, and active error compensation that dynamically corrects for supply ripple and thermal gradients. Measured output jitter is 0.35 µs (typ.) across −40°C to +150°C - verified in conducted and radiated EMC testing per ISO 11452-2/4.
Can the TLE49681LHALA1 operate with reverse battery polarity connected?
Yes - it includes integrated reverse polarity protection rated to −18 V. When VDD is connected to battery ground and GND to battery negative, the device blocks conduction and draws <10 µA. This protects against accidental battery terminal reversal during service or assembly without external diodes.
TLE49681LHALA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 3-SSIP, SSO-3-02
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Function:
- Bipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- 2.25mT Trip, -2.25mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3V ~ 32V
- Current - Supply (Max):
- 2.5mA
- Current - Output (Max):
- 25mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 170°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- PG-SSO-3-2
TLE49681LHALA1 FAQ
1.How can I place an order for TLE49681LHALA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE49681LHALA1 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 TLE49681LHALA1 reliable?
The price and inventory of TLE49681LHALA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE49681LHALA1 is usually 5 days.
3.What payment methods are accepted for TLE49681LHALA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE49681LHALA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE49681LHALA1?
TLE49681LHALA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE49681LHALA1 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 TLE49681LHALA1?
For technical support, including TLE49681LHALA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE49681LHALA1 requirements.
6.How does Aetrix verify that TLE49681LHALA1 is sourced from the original manufacturer or authorized distributors?
All TLE49681LHALA1 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 TLE49681LHALA1 meets industry standards.
7.What is the process for return or replacement of TLE49681LHALA1?
All TLE49681LHALA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE49681LHALA1, 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 TLE49681LHALA1 part is unused and in its original packaging.
Return procedure for TLE49681LHALA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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