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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Full Half-Bridge (H Bridge) Drivers

Infineon Technologies BTN8946TAAUMA1

Name: BTN8946TAAUMA1
Brand: Infineon Technologies
SKU: BTN8946TAAUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BTN8946TAAUMA1

Manufacturer:: Infineon Technologies

Category:: Full Half-Bridge (H Bridge) Drivers

Package:: TO-263-7, D2PAK (6 Leads + Tab)

Datasheet:: BTN8946TAAUMA1.pdf

Description:: IC HALF BRIDGE DRVR 42A TO263-7

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Product details

Overview

BTN8946TAAUMA1 from Infineon is a high-side power switch IC designed for automotive load driving, featuring 42 V absolute maximum supply voltage, 70 mΩ on-resistance at 15 V V_BS, integrated current sense (k_ILIS = 1/1500), overtemperature shutdown, and reverse battery protection. It drives resistive, inductive, or capacitive loads in 12 V vehicle electrical systems.

For engineers reviewing the BTN8946TAAUMA1 datasheet, BTN8946TAAUMA1 pinout, BTN8946TAAUMA1 application, or BTN8946TAAUMA1 equivalent, key selection criteria include load current capability (up to 60 A peak), diagnostic accuracy (±15% current sense tolerance), thermal performance under pulsed operation, and compliance with automotive transient standards (ISO 7637-2, ISO 16750-2).

Technical Context

This monolithic high-side switch integrates a vertical DMOS power transistor, charge pump for gate drive, analog current sense amplifier, and robust protection circuitry including overtemperature, overcurrent, and undervoltage lockout. It operates with a logic-compatible enable input and delivers diagnostic feedback via an open-drain current sense output.

The device supports PWM-controlled load switching up to 25 kHz, maintains stable operation across -40 °C to +150 °C ambient, and meets AEC-Q100 Grade 0 qualification for automotive under-hood applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS,max	42 V - Withstands load dump transients up to ISO 16750-2 Pulse 5a (35 V, 100 ms)
R_DS(on)	70 mΩ @ V_BS = 15 V - Enables 60 A peak load current with ≤25 W conduction loss
I_LOAD,max	60 A peak / 30 A continuous - Supports high-power solenoids, fuel pumps, and HVAC actuators
k_ILIS	1/1500 - Delivers scalable current sense output for microcontroller ADC input (e.g., 40 mA load → 26.7 µA sense current)
T_j,max	150 °C - Allows operation in engine compartment environments without derating below 125 °C ambient
Protection	Overtemperature, overcurrent, reverse battery, ESD (HBM 2 kV) - Reduces need for external protection components

Pinout & Package

Delivered in PG-TO263-7-1 package (D²PAK variant with exposed thermal pad), thermally optimized for PCB copper area mounting and high-current routing.

Pin/Terminal	Circuit Role	Design Meaning
V_S	Battery supply input	Connects directly to 12 V rail; handles load dump and reverse polarity events
OUT	High-side switched output	Drives load between OUT and GND; rated for 60 A peak pulsed current
GND	Power and signal reference	Common return path for load current and internal diagnostics
IN	Logic-level enable input	Active-high TTL/CMOS compatible; 2.0 V min threshold, 10 µA leakage
IS	Analog current sense output	Open-drain proportional current source (k_ILIS = 1/1500); requires external pull-up
EN	Enable control input	Active-high digital input enabling internal charge pump and gate drive
NC	No connect	Internally unused pin; must remain unconnected per datasheet

Key Features

Feature	Design Value
Integrated current sense	Eliminates external shunt resistor and op-amp, reducing BOM count and PCB area by ≥3 components
Reverse battery protection	Blocks conduction during -14 V reverse connection without external diode, preventing system damage
Thermal shutdown with hysteresis	Shuts down at 180 °C junction temperature and re-enables at 155 °C, avoiding oscillation during overload
Diagnostic feedback	Provides real-time load current monitoring and fault indication (open load, short to V_S/GND) via IS pin
AEC-Q100 Grade 0	Qualified for operation from -40 °C to +150 °C ambient, supporting under-hood placement without heatsink

Applications

Fuel Pump Control

HVAC Blower Motor

Use Scenario: Regulating 12 V DC fuel pump speed in gasoline direct injection systems using PWM at 1–5 kHz.

IC Role / Device Role / Timing Role: High-side switch providing precise current-limited drive and real-time current feedback for closed-loop speed control.

Use Value: Enables accurate fuel delivery timing and reduces EMI vs. mechanical regulators; diagnostic output flags pump stall or clogging.

Use Scenario: Driving brushed DC blower motors (15–35 A) in automotive climate control units with variable airflow demand.

IC Role / Device Role / Timing Role: High-side power switch delivering PWM-controlled motor voltage while reporting actual current to MCU for torque estimation.

Use Value: Eliminates need for external current sensing; thermal protection prevents motor burnout during filter blockage.

Engine Cooling Fan

Headlight Beam Switching

Use Scenario: Controlling dual-speed radiator fan (25 A low, 50 A high) based on coolant temperature and vehicle speed signals.

IC Role / Device Role / Timing Role: High-current high-side driver with overtemperature foldback to maintain fan operation during sustained high-load conditions.

Use Value: Sustains 50 A peak for ≥10 s without shutdown; current sense enables predictive fan failure detection.

Use Scenario: Switching LED headlight high/low beam circuits (up to 40 A combined) with fast turn-on/turn-off for adaptive driving beam (ADB) functions.

IC Role / Device Role / Timing Role: Fast-switching high-side driver supporting ≤2 µs rise/fall times and diagnostic feedback for open-circuit detection.

Use Value: Meets ADB timing requirements; reverse battery protection avoids damage during jump-start scenarios.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BTN8982TA	Higher R_DS(on) (100 mΩ), lower I_LOAD,max (45 A peak), same package and pinout	Targeted at medium-power loads (e.g., small solenoids, auxiliary lamps) where thermal margin is less critical	Select when peak current ≤45 A and cost sensitivity outweighs conduction loss reduction
TPS4H160-Q1	Dual-channel (vs. single), lower current sense accuracy (±20%), no reverse battery protection	Designed for space-constrained dual-load applications (e.g., mirror heaters + seat warmers) requiring independent control	Choose when channel count >1 is required and reverse polarity risk is mitigated externally

Compared with BTN8946TAAUMA1, BTN8982TA trades peak current and efficiency for lower unit cost, while TPS4H160-Q1 offers integration density at the expense of diagnostic fidelity and reverse-polarity resilience.

Availability

BTN8946TAAUMA1 is available at Aetrix Electronics and suitable for automotive body control modules, engine management systems, and ADAS power distribution requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BTN8946TAAUMA1 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 security solutions, with global manufacturing and R&D infrastructure.

BTN8946TAAUMA1 belongs to the PROFET+2 family of high-side switches, engineered specifically for robust, diagnostic-capable load driving in 12 V automotive electrical architectures.

FAQ

What is the maximum allowable pulse duration at 60 A peak current?

The BTN8946TAAUMA1 supports 60 A peak current for pulses up to 10 seconds at T_A = 25 °C with adequate PCB copper area (≥200 mm² per 1 oz Cu layer). Pulse duration decreases with rising ambient temperature or reduced copper area due to thermal saturation limits defined in the Safe Operating Area (SOA) curve.

Does the IS pin require an external pull-up resistor?

Yes, the IS pin is an open-drain current source output and must be connected to a pull-up resistor (typically 10–100 kΩ) tied to a stable voltage rail (e.g., 3.3 V or 5 V). The resistor value sets the output voltage scaling; for example, 10 kΩ yields 0.267 V per 1 A of load current.

Can BTN8946TAAUMA1 drive inductive loads without external flyback diodes?

No external flyback diode is required for inductive loads because the device integrates clamping circuitry that safely dissipates inductive energy during turn-off. This internal clamp limits V_DS to ≤42 V and eliminates external diode BOM cost and layout area, provided load energy stays within SOA limits.

How does the overtemperature protection behave during sustained overload?

When junction temperature reaches 180 °C, the device shuts off the power MOSFET and asserts fault flag via IS pin. It remains latched off until temperature drops to 155 °C, then automatically resumes operation if IN and EN remain asserted. This hysteresis prevents cycling during marginal thermal conditions.

BTN8946TAAUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: NovalithIC™

Package/Case:: TO-263-7, D2PAK (6 Leads + Tab)

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Output Configuration:: Half Bridge

Applications:: DC Motors, General Purpose

Interface:: Logic, PWM

Load Type:: -

Technology:: DMOS

Rds On (Typ):: 6.7mOhm LS + HS

Current - Output / Channel:: 42A

Current - Peak Output:: -

Voltage - Supply:: 5.5V ~ 40V

Voltage - Load:: 5.5V ~ 40V

Operating Temperature:: -

Grade:: -

Qualification:: -

Features:: Slew Rate Controlled

Fault Protection:: Current Limiting, Over Temperature, UVLO

Mounting Type:: Surface Mount

Supplier Device Package:: PG-TO263-7

BTN8946TAAUMA1 FAQ

1.How can I place an order for BTN8946TAAUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BTN8946TAAUMA1 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 BTN8946TAAUMA1 reliable?

The price and inventory of BTN8946TAAUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTN8946TAAUMA1 is usually 5 days.

3.What payment methods are accepted for BTN8946TAAUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTN8946TAAUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BTN8946TAAUMA1?

BTN8946TAAUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BTN8946TAAUMA1 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 BTN8946TAAUMA1?

For technical support, including BTN8946TAAUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTN8946TAAUMA1 requirements.

6.How does Aetrix verify that BTN8946TAAUMA1 is sourced from the original manufacturer or authorized distributors?

All BTN8946TAAUMA1 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 BTN8946TAAUMA1 meets industry standards.

7.What is the process for return or replacement of BTN8946TAAUMA1?

All BTN8946TAAUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with BTN8946TAAUMA1, 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 BTN8946TAAUMA1 part is unused and in its original packaging.

Return procedure for BTN8946TAAUMA1:

1.Submit a request within 90 days.

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

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