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

Infineon Technologies TLV4946KFTSA1

Name: TLV4946KFTSA1
Brand: Infineon Technologies
SKU: TLV4946KFTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLV4946KFTSA1

Manufacturer:: Infineon Technologies

Category:: Switches (Solid State)

Package:: -

Datasheet:: TLV4946KFTSA1.pdf

Description:: POSITION&CURRENT SENSORS

Quantity:: RFQ Add To RFQ list

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Inventory:3,000

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Product details

Overview

TLV4946KFTSA1 from Infineon Technologies is a high-precision Hall effect latch IC with digital open-drain output, designed for magnetic position sensing in industrial and consumer systems. It operates from 2.7 V to 18 V, features ±4 kV HBM ESD rating, 1 µs typical jitter, ±0.5 mT magnetic operate/release thresholds (B_OP/B_RP), and functions reliably up to +85°C ambient temperature - used in BLDC motor commutation and index counting on rotating shafts.

For engineers reviewing the TLV4946KFTSA1 datasheet, TLV4946KFTSA1 pinout, TLV4946KFTSA1 application, or TLV4946KFTSA1 equivalent, key selection criteria include magnetic threshold accuracy, supply voltage range, open-drain sink capability (20 mA), thermal stability of switching points, and SOT23-compatible PG-SC59-3-5 packaging for surface-mount motor control PCBs.

Technical Context

The device implements on-chip chopper stabilization and active offset compensation to cancel stress- and temperature-induced voltage drift, enabling stable magnetic switching thresholds across its operating range. Its bipolar latching behavior responds to south-pole fields ≥ B_OP (+3.5 mT typ.) to assert output low and north-pole fields ≥ |B_RP| (−3.0 mT typ.) to release it.

Internal reverse-battery protection withstands −18 V input, and the open-drain output stage supports pull-up to any voltage ≤ V_CC, allowing flexible interfacing with 3.3 V or 5 V logic. No external components are required for basic operation beyond the pull-up resistor.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.7 V to 18 V - enables direct connection to unregulated 12 V rail or battery inputs without LDO.
Output Type	Open-drain, 20 mA sink - interfaces directly with microcontroller GPIO or logic-level MOSFET gate drivers.
Magnetic B_OP	+3.5 mT (typ.), ±0.5 mT (max) - ensures precise rotor pole detection in BLDC motors with tight air-gap tolerances.
Magnetic B_RP	−3.0 mT (typ.), ±0.5 mT (max) - provides clean hysteresis (0.5 mT) to reject noise and mechanical vibration.
Jitter	1 µs (typ.) - supports accurate timing-critical commutation at motor speeds up to ~30,000 RPM.
ESD Rating	±4 kV HBM - meets IEC 61000-4-2 Level 3 for robustness in factory-assembled consumer appliances.
Operating Temp	−40°C to +85°C - validated for indoor industrial enclosures and white-goods environments (e.g., washing machine control boards).

Pinout & Package

TLV4946KFTSA1 is housed in a lead-free, halogen-free PG-SC59-3-5 package - identical in footprint and solder profile to industry-standard SOT23-3, enabling drop-in PCB replacement.

Pin/Terminal	Circuit Role	Design Meaning
V_CC (Pin 1)	Positive supply input	Accepts 2.7–18 V; includes reverse-polarity protection down to −18 V.
GND (Pin 2)	Ground reference	Common return for supply and output current; must be low-impedance for stable switching.
OUT (Pin 3)	Digital output terminal	Open-drain N-channel MOSFET sink; requires external pull-up to define logic-high level.

Key Features

Feature	Design Value
Chopper-stabilized front-end	Eliminates offset drift from thermal stress and molding-induced strain, ensuring <±0.5 mT threshold variation over temperature.
Bipolar latching logic	South-pole activation (B_OP) and north-pole release (B_RP) enable reliable direction-agnostic position detection in rotating assemblies.
Wide supply range	2.7–18 V operation allows use with 3.3 V logic rails or 12 V automotive-grade supplies without regulation.
Reverse-battery protection	Withstands −18 V applied to V_CC, preventing damage during board-level testing or field wiring errors.

Applications

BLDC Motor Commutation

Index Counting on Rotating Shafts

Use Scenario: Detecting rotor pole position in 3-phase brushless DC motors for electronic commutation in HVAC blowers and pump drives.

IC Role / Device Role / Timing Role: Provides synchronized digital edge transitions aligned to magnetic pole transitions, triggering gate driver sequencing.

Use Value: Tight ±0.5 mT B_OP/B_RP tolerance ensures consistent electrical angle alignment across temperature, reducing torque ripple by up to 12% vs. standard latches.

Use Scenario: Counting gear teeth or magnetized poles on motor shafts for speed feedback in washing machine drum control.

IC Role / Device Role / Timing Role: Generates clean, jitter-free pulses per pole transition for microcontroller-based frequency-to-voltage conversion.

Use Value: 1 µs typical jitter enables accurate RPM measurement up to 30,000 RPM with <0.1% error at 1 kHz pulse rate.

Air Conditioning Fan Control

Rolling Shutter Position Sensing

Use Scenario: Monitoring fan motor rotation in residential split-system AC units to verify startup and detect stall conditions.

IC Role / Device Role / Timing Role: Acts as a safety-critical rotation monitor, asserting fault signal if no edge is detected within timeout window.

Use Value: Reverse-battery protection (−18 V) prevents latch damage during field service with misconnected test leads.

Use Scenario: Detecting end-of-travel positions in motorized rolling shutters using embedded magnets in guide rails.

IC Role / Device Role / Timing Role: Provides discrete ON/OFF signals indicating upper/lower limit switch closure via magnet proximity.

Use Value: High ESD rating (±4 kV HBM) ensures reliability in dusty, static-prone installation environments without added TVS diodes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV4946-2KFTSA1	Identical pinout and package; B_OP/B_RP thresholds shifted to +4.0/−3.5 mT for higher immunity in noisy magnetic fields.	Preferred for BLDC motors with stronger magnets or larger air gaps where tighter hysteresis is not required.	Select TLV4946-2K when system-level magnetic field strength exceeds 5 mT peak and positional repeatability > ±1° is needed.
US5881LUA	Lower supply range (3.0–24 V), higher B_OP (6.5 mT), no reverse-battery protection, ±2 kV HBM ESD.	Suitable for cost-sensitive consumer devices where field strength is consistently high and reverse polarity risk is absent.	Choose US5881LUA only if design eliminates negative transients and accepts wider magnetic threshold spread (±1.5 mT).

Compared with TLV4946KFTSA1, TLV4946-2KFTSA1 offers higher magnetic immunity at the expense of slightly reduced sensitivity, while US5881LUA trades reverse-protection and ESD robustness for broader voltage headroom - making TLV4946K optimal for balanced performance in mid-field industrial motion control.

Availability

TLV4946KFTSA1 is available at Aetrix Electronics and suitable for BLDC motor commutation, index counting on rotating shafts, and rolling shutter position sensing requiring stable component supply and long-term industrial lifecycle support.

Supply support for TLV4946KFTSA1 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, sensor, and automotive ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The TLV4946K belongs to Infineon's value-optimized Hall effect latch product line, engineered for precision position sensing in cost-sensitive industrial and consumer motor control applications - not qualified for automotive use.

FAQ

What is the maximum sink current capability of the TLV4946KFTSA1 output?

The OUT pin supports a continuous sink current of 20 mA at V_CC = 12 V and T_A = 25°C. Derating applies above 85°C ambient; at 100°C junction temperature, maximum safe sink drops to 15 mA. This rating allows direct driving of small-signal MOSFET gates or microcontroller interrupt inputs without buffering.

Does TLV4946KFTSA1 require an external pull-up resistor?

Yes - the open-drain output requires an external pull-up resistor to define the logic-high voltage level. Typical values range from 4.7 kΩ (for 3.3 V logic) to 10 kΩ (for 5 V or 12 V systems). Pull-up to voltages exceeding V_CC is permitted, enabling level-shifting between different logic domains.

Can TLV4946KFTSA1 operate with a 3.3 V supply?

Yes - the device is fully specified from 2.7 V to 18 V. At 3.3 V, B_OP remains +3.5 mT (typ.) and jitter stays at 1 µs (typ.), with full functionality including reverse-battery protection and ESD robustness preserved. No configuration changes or external components are needed.

Is TLV4946KFTSA1 qualified for automotive applications?

No - the datasheet explicitly states "Not suitable for automotive applications." It lacks AEC-Q100 qualification, extended temperature grade (−40°C to +125°C), and automotive-specific failure mode analysis. For automotive use, Infineon recommends the TLV4946-2K variant only in non-safety-critical subsystems, subject to customer validation.

TLV4946KFTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Function:: -

Technology:: -

Polarization:: -

Sensing Range:: -

Test Condition:: -

Voltage - Supply:: -

Current - Supply (Max):: -

Current - Output (Max):: -

Output Type:: -

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TLV4946KFTSA1 FAQ

1.How can I place an order for TLV4946KFTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLV4946KFTSA1 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 TLV4946KFTSA1 reliable?

The price and inventory of TLV4946KFTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV4946KFTSA1 is usually 5 days.

3.What payment methods are accepted for TLV4946KFTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV4946KFTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLV4946KFTSA1?

TLV4946KFTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLV4946KFTSA1 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 TLV4946KFTSA1?

For technical support, including TLV4946KFTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV4946KFTSA1 requirements.

6.How does Aetrix verify that TLV4946KFTSA1 is sourced from the original manufacturer or authorized distributors?

All TLV4946KFTSA1 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 TLV4946KFTSA1 meets industry standards.

7.What is the process for return or replacement of TLV4946KFTSA1?

All TLV4946KFTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV4946KFTSA1, 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 TLV4946KFTSA1 part is unused and in its original packaging.

Return procedure for TLV4946KFTSA1:

1.Submit a request within 90 days.

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

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