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

Infineon Technologies TLE4946H

Name: TLE4946H
Brand: Infineon Technologies
SKU: TLE4946H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4946H

Manufacturer:: Infineon Technologies

Category:: Switches (Solid State)

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: TLE4946H.pdf

Description:: MAGNETIC SWITCH LATCH SC59

Quantity:: RFQ Add To RFQ list

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Inventory:4,966

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Product details

Overview

TLE4946H from Infineon Technologies is a high-precision bipolar Hall-effect latch sensor in SC59 (SOT23-compatible) package, operating from 2.7 V to 24 V supply, featuring ±6 kV HBM ESD rating, 1 µs typical jitter, and active error compensation for mechanical stress immunity. It delivers stable magnetic switching points over –40°C to 150°C ambient, used in automotive crankshaft position sensing and industrial motor commutation.

For engineers reviewing the TLE4946H datasheet, TLE4946H pinout, TLE4946H application, or TLE4946H equivalent, key selection criteria include magnetic offset stability, reverse battery protection (–18 V), chopper-stabilized threshold accuracy, and SMD SC59 footprint compatibility with legacy SOT23 layouts.

Technical Context

The TLE4946H integrates a chopped Hall probe, on-chip oscillator, bias generator, low-pass filtered amplifier, comparator with hysteresis, and reverse-polarity-protected voltage regulator. Its active error compensation circuit rejects offsets induced by molding stress and thermal gradients across the die.

It operates as a digital latch: output Q switches high when south pole field exceeds B_OP = +3.5 mT (typ.) and remains latched until north pole field exceeds B_RP = –3.5 mT (typ.), enabling robust position detection in rotating systems without external debouncing.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 24 V - supports direct connection to unregulated 12 V/24 V automotive rails without external LDO
Reverse Battery Protection	–18 V - withstands reverse polarity transients common in vehicle jump-start scenarios
Jitter (typ.)	1 µs - enables reliable timing resolution for ≤500 kHz rotational speed measurement
ESD Rating (HBM)	±6 kV - meets ISO 10605 requirements for in-vehicle sensor modules
Operating Temperature	–40°C to +150°C ambient - qualified for under-hood engine control unit placement
Magnetic Switch Points	B_OP = +3.5 mT / B_RP = –3.5 mT (typ.) - tight ±0.5 mT matching ensures consistent latching across production lots
Output Type	Open-drain N-channel MOSFET - allows flexible pull-up to 5 V, 12 V, or 24 V logic domains

Pinout & Package

Package: SC59 (SOT23-compatible 3-pin surface-mount package, JEDEC TO-236AB outline).

Pin/Terminal	Circuit Role	Design Meaning
1 (VS)	Supply input	Accepts 2.7–24 V; internal reverse-battery protection diode conducts at –18 V
2 (Q)	Digital output	Open-drain output; sinks up to 50 mA; requires external pull-up for logic-high state
3 (GND)	Ground reference	Return path for supply and output current; tied to substrate for EMI suppression

Key Features

Feature	Design Value
Chopper stabilization	Eliminates offset drift from temperature gradients and process variation, maintaining <±0.3 mT magnetic threshold shift over full temperature range
Active error compensation	Rejects mechanical stress-induced Hall voltage offsets from PCB soldering and package molding, reducing calibration need in production
High ESD robustness	±6 kV HBM rating enables handling without special ESD controls during SMT assembly
Wide supply tolerance	Operates down to 2.7 V - supports cold-cranking detection in 12 V systems with battery sag below 6 V

Applications

Automotive Crankshaft Sensing

Industrial BLDC Motor Commutation

Use Scenario: Detecting toothed wheel rotation on engine crankshaft for ignition timing and RPM calculation.

IC Role / Device Role / Timing Role: Bipolar latch providing edge-triggered digital pulses synchronized to gear tooth transitions.

Use Value: ±0.5 mT magnetic hysteresis prevents contact bounce artifacts at low RPM; 1 µs jitter ensures ≤0.1° crank angle uncertainty at 6000 RPM.

Use Scenario: Rotor position feedback for 3-phase brushless DC motor control in HVAC blowers and pumps.

IC Role / Device Role / Timing Role: Hall latch generating commutation signals for gate driver sequencing.

Use Value: Active error compensation maintains signal integrity despite thermal cycling between –40°C and +125°C in sealed motor housings.

Electric Power Steering (EPS) Torque Sensing

Industrial Conveyor Speed Monitoring

Use Scenario: Measuring relative angular displacement between input and output shafts via dual magnet arrangement.

IC Role / Device Role / Timing Role: High-stability latch detecting differential magnetic field polarity shifts for torque magnitude sign determination.

Use Value: ±6 kV ESD rating survives assembly handling and in-system ESD events near steering column wiring harnesses.

Use Scenario: Monitoring belt-driven conveyor speed using ferrous target wheel mounted on drive shaft.

IC Role / Device Role / Timing Role: Digital position latch interfacing directly with PLC high-speed counter inputs.

Use Value: 24 V supply operation eliminates need for local DC-DC converter; SC59 footprint simplifies layout in space-constrained control enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bipolar Hall latch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Allegro A3295LUA-T	Higher B_OP/B_RP (±5 mT), no reverse battery protection	Lacks –18 V tolerance; unsuitable for direct battery-connected automotive nodes	Select only if system includes external reverse-polarity protection and higher field strength magnets are used
Melexis US1881EUA-ABA-002-SP	Wider supply range (3.5–24 V), lower ESD (±4 kV HBM)	Requires ≥3.5 V start-up; less robust in high-ESD manufacturing environments	Prefer where board-level ESD controls are already implemented and supply regulation is tighter

Compared with A3295LUA-T and US1881EUA-ABA-002-SP, the TLE4946H uniquely combines reverse battery protection, ±6 kV ESD, and sub-1 µs jitter-making it optimal for cost-sensitive, unregulated 12 V automotive sensors requiring zero external protection components.

Availability

TLE4946H is available at Aetrix Electronics and suitable for automotive crankshaft sensing, industrial BLDC motor commutation, electric power steering torque sensing, and conveyor speed monitoring requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLE4946H 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 ICs, and sensor solutions, with global R&D and wafer fabrication facilities.

The TLE4946H belongs to Infineon's high-precision Hall-effect sensor product line, engineered for automotive and industrial motion sensing where magnetic accuracy, thermal stability, and system-level robustness are critical.

FAQ

What is the magnetic sensitivity polarity configuration of the TLE4946H?

The TLE4946H is a bipolar latch: it turns ON (Q = low) when exposed to a sufficient south-pole magnetic field (B_OP ≈ +3.5 mT) and remains latched until a sufficient north-pole field (B_RP ≈ –3.5 mT) resets it. This polarity behavior is fixed and non-programmable per device.

Can the TLE4946H operate directly from a 24 V truck battery without external regulation?

Yes. The TLE4946H supports 2.7 V to 24 V supply voltage and includes integrated reverse-battery protection up to –18 V. It draws ≤8 mA typical quiescent current and tolerates load dump transients when used with a series resistor ≥200 Ω, per datasheet absolute maximum ratings.

Is the SC59 package of the TLE4946H compatible with standard SOT23 pick-and-place equipment?

Yes. The SC59 package is mechanically identical to JEDEC TO-236AB (commonly called SOT23-3), with 1.35 mm × 2.08 mm body dimensions and 0.95 mm lead pitch. Standard SOT23 nozzles and stencil apertures are fully compatible without retooling.

Does the TLE4946H require an external pull-up resistor on the Q output?

Yes. The Q pin is an open-drain N-channel MOSFET output. A pull-up resistor to the desired logic rail (e.g., 5 V, 12 V, or 24 V) is mandatory to establish a valid high state. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and bus capacitance requirements.

TLE4946H Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: TLE

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Latch

Technology:: Hall Effect

Polarization:: South Pole

Sensing Range:: 17mT Trip, -17mT Release

Test Condition:: 25°C

Voltage - Supply:: 2.7V ~ 18V

Current - Supply (Max):: 6mA

Current - Output (Max):: 20mA

Output Type:: Open Collector

Features:: Temperature Compensated

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC59-3

TLE4946H FAQ

1.How can I place an order for TLE4946H through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4946H 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 TLE4946H reliable?

The price and inventory of TLE4946H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4946H is usually 5 days.

3.What payment methods are accepted for TLE4946H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4946H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4946H?

TLE4946H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4946H 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 TLE4946H?

For technical support, including TLE4946H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4946H requirements.

6.How does Aetrix verify that TLE4946H is sourced from the original manufacturer or authorized distributors?

All TLE4946H 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 TLE4946H meets industry standards.

7.What is the process for return or replacement of TLE4946H?

All TLE4946H units undergo pre-shipment inspection (PSI). If there is an issue with TLE4946H, 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 TLE4946H part is unused and in its original packaging.

Return procedure for TLE4946H:

1.Submit a request within 90 days.

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

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