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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Infineon Technologies TLE4935G

Name: TLE4935G
Brand: Infineon Technologies
SKU: TLE4935G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4935G

Manufacturer:: Infineon Technologies

Category:: Switches (Solid State)

Package:: TO-243AA

Datasheet:: TLE4935G.pdf

Description:: MAGNETIC SWITCH LATCH SOT89-3

Quantity:: RFQ Add To RFQ list

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Inventory:3,405

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Product details

Overview

TLE4935G 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 4.0 V to 24 V supply, delivers ±100 mA output current, and functions across –40 °C to +150 °C junction temperature. It is used in brushless DC motor commutation and rotational indexing where polarity-reversal detection is required.

For engineers reviewing the TLE4935G datasheet, TLE4935G pinout, TLE4935G application, or TLE4935G equivalent, key selection criteria include bipolar magnetic switching thresholds (B_OP = ±3.5 mT typ., |B_RP| = ±2.5 mT typ.), reverse-polarity protection, integrated output disturbance immunity, and SOT-89 package compatibility with high-temperature PCB layouts.

Technical Context

The TLE4935G integrates a Hall generator, amplifier, Schmitt trigger, internal voltage reference, and reverse-polarity protection diode on a single silicon die. Its bipolar operation requires both positive and negative magnetic fields to toggle state - turn-on at +B_OP, turn-off only upon exceeding –|B_RP| - enabling latching behavior without external circuitry.

Output stage uses an open-collector NPN transistor rated for –32 V maximum V_Q and –100 mA peak reverse current. Internal thermal shutdown and ESD protection ensure robustness in noisy automotive environments where supply transients and load dump events occur.

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 cranking dips and load dump surges
Operating Temperature	–40 °C to +150 °C - qualified for under-hood engine control and transmission position sensing
Magnetic Operate Point (B_OP)	±3.5 mT typ. - enables reliable switching with standard ferrite magnets at air gaps up to 2.5 mm
Magnetic Release Point (\|B_RP\|)	±2.5 mT typ. - provides 1.0 mT hysteresis to reject mechanical vibration-induced false triggers
Output Configuration	Open-collector NPN - allows wired-OR logic, pull-up to higher voltage rail, and direct interface with microcontroller GPIO
Reverse Polarity Protection	Integrated diode - eliminates need for external series diode in battery-connected applications
Output Current Rating	–100 mA continuous - drives relays, small solenoids, or LED indicators without external buffer

Pinout & Package

SOT-89 package: 3-pin surface-mount plastic package with exposed thermal pad (pin 1 = VS, pin 2 = GND, pin 3 = Q), optimized for thermal dissipation in high-ambient environments.

Pin/Terminal	Circuit Role	Design Meaning
1 (VS)	Positive supply input	Accepts 4–24 V DC; internally powers Hall element, amplifier, and Schmitt trigger; includes reverse-polarity protection
2 (GND)	Ground reference	Common return path for supply and output; must be low-impedance to minimize noise coupling into Hall sensor
3 (Q)	Open-collector output	NPN emitter-grounded switch; sinks current when active; requires external pull-up to define logic HIGH level

Key Features

Feature	Design Value
Bipolar magnetic response	Enables latching operation without external feedback - output remains ON until reverse field exceeds \|B_RP\|
Temperature-compensated thresholds	B_OP and B_RP drift < ±10% over –40 °C to +150 °C - ensures consistent switching across full automotive range
Integrated reverse-polarity protection	Withstands –40 V supply reversal for < 400 ms - eliminates risk of damage during battery jump-start or misconnection
Output transient immunity	Internal clamping protects against inductive kickback and ESD - no external TVS required in typical motor-control layouts
High ESD rating	≥2 kV HBM - meets ISO 10605 requirements for automotive module assembly and handling

Applications

Brushless DC Motor Commutation

Rotational Indexing

Use Scenario: Detecting rotor magnet polarity to sequence stator phase energization in 3-phase BLDC motors.

IC Role / Device Role / Timing Role: Bipolar Hall switch providing edge-triggered commutation signals synchronized to mechanical rotation.

Use Value: Eliminates need for external latch or debounce circuitry due to built-in hysteresis and latching behavior.

Use Scenario: Counting gear teeth or cam lobes on rotating shafts in transmission or engine timing systems.

IC Role / Device Role / Timing Role: Magnetic zero-crossing detector generating clean digital pulses per tooth passage.

Use Value: Stable pulse timing across temperature due to compensated B_OP/B_RP, reducing position error in closed-loop control.

Position/Proximity Indicator

Seat Belt Buckle Detection

Use Scenario: Sensing closure of hoods, doors, or trunk lids using embedded magnets and fixed Hall ICs.

IC Role / Device Role / Timing Role: Unidirectional proximity monitor detecting presence/absence via magnetic field strength threshold crossing.

Use Value: Reverse-polarity protection prevents failure during vehicle service when battery terminals are swapped.

Use Scenario: Confirming buckle engagement in automotive seat belt assemblies using small rare-earth magnets.

IC Role / Device Role / Timing Role: Safety-critical status indicator with fail-safe open-collector output tied to airbag control unit.

Use Value: Qualified to AEC-Q100 Grade 0 (–40 °C to +150 °C) and supports functional safety requirements per ISO 26262 ASIL-B readiness.

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 A3295LUA-T	Bipolar, 3.5–24 V supply, ±3.0 mT B_OP, SOT-23 package, no reverse-polarity protection	Lacks integrated reverse-voltage protection; requires external diode in battery-fed designs	Preferred where board space is constrained and reverse-protection is added externally
Melexis US1881EUA-ABA-002-SP	Bipolar, 3.5–24 V, ±3.8 mT B_OP, 3-pin SOT-23, includes reverse-polarity protection but no output transient immunity	No internal output clamping - needs external TVS for inductive load switching	Selected when cost sensitivity outweighs need for integrated disturbance protection

Compared with A3295LUA-T and US1881EUA-ABA-002-SP, the TLE4935G uniquely combines bipolar latching, reverse-polarity diode, and output transient immunity in SOT-89 - making it optimal for under-hood automotive sensors where reliability under electrical stress is non-negotiable.

Availability

TLE4935G 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 TLE4935G 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 automotive powertrain and chassis systems, emphasizing ruggedness, temperature stability, and functional safety compliance.

FAQ

What magnetic field strength is required to activate the TLE4935G?

The TLE4935G activates at a positive magnetic flux density of +3.5 mT (typical B_OP) and releases only when a reverse field of –2.5 mT (typical |B_RP|) is applied. This bipolar hysteresis ensures stable latching behavior without oscillation near threshold, supporting reliable detection with common NdFeB or ferrite magnets at air gaps up to 2.5 mm.

Can the TLE4935G operate directly from a 12 V automotive battery?

Yes - the TLE4935G operates across 4.0 V to 24 V supply voltage, covering nominal 12 V, cranking dips (~6 V), and load dump transients (< 32 V for < 400 ms). Its integrated reverse-polarity protection diode also withstands –40 V for short durations, eliminating need for external protection in battery-connected circuits.

Is the TLE4935G compatible with microcontroller GPIO inputs?

Yes - its open-collector NPN output can interface directly with standard 3.3 V or 5 V microcontroller GPIO pins when pulled up to the MCU's I/O voltage. The output sinks up to 100 mA, allowing direct drive of LEDs or small loads; for higher currents, an external MOSFET or driver is recommended.

Does the TLE4935G meet automotive qualification standards?

Yes - the TLE4935G is qualified per AEC-Q100 Grade 0 (–40 °C to +150 °C), supports ISO 16750 environmental stress testing, and is designed for functional safety applications aligned with ISO 26262 ASIL-B readiness. It includes built-in diagnostics such as supply monitoring and thermal shutdown.

TLE4935G Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: TLE

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Latch

Technology:: Hall Effect

Polarization:: South Pole

Sensing Range:: 20mT Trip, -20mT 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 ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT89

TLE4935G FAQ

1.How can I place an order for TLE4935G through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4935G 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 TLE4935G reliable?

The price and inventory of TLE4935G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4935G is usually 5 days.

3.What payment methods are accepted for TLE4935G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4935G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4935G?

TLE4935G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4935G 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 TLE4935G?

For technical support, including TLE4935G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4935G requirements.

6.How does Aetrix verify that TLE4935G is sourced from the original manufacturer or authorized distributors?

All TLE4935G 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 TLE4935G meets industry standards.

7.What is the process for return or replacement of TLE4935G?

All TLE4935G units undergo pre-shipment inspection (PSI). If there is an issue with TLE4935G, 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 TLE4935G part is unused and in its original packaging.

Return procedure for TLE4935G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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