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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

Infineon Technologies AUIRB24427STR

Name: AUIRB24427STR
Brand: Infineon Technologies
SKU: AUIRB24427STR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRB24427STR

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AUIRB24427STR.pdf

Description:: IC GATE DRVR LOW-SIDE 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AUIRB24427STR from Infineon Technologies (formerly International Rectifier) is an automotive-qualified dual low-side gate driver IC designed to drive high-current N-channel MOSFETs or IGBTs in bridge, DC-DC, and hybrid powertrain configurations. It features matched 40 ns / 55 ns turn-on/turn-off propagation delays, <0.65 Ω output resistance at +125°C, 12.5–24 V supply range, and integrated enable and under-voltage lockout functions.

For engineers reviewing the AUIRB24427STR datasheet, AUIRB24427STR pinout, AUIRB24427STR application, or AUIRB24427STR equivalent, key selection criteria include dual-channel timing matching, TTL/CMOS-compatible Schmitt-trigger inputs, 6 A pulsed output capability, thermal robustness to +125°C ambient, and PSOIC-8N package suitability for high-density automotive PCB layouts.

Technical Context

The AUIRB24427STR integrates two independent low-side drivers with CMOS Schmitt-triggered inputs and matched propagation delay paths-ensuring synchronized switching of complementary half-bridge legs. Each channel delivers >6 A pulsed sink/source current with output resistance specified at 450 mΩ (25°C) and 650 mΩ (+125°C).

It implements a dedicated EN pin with 0.8 V hysteresis and VCC UVLO with 1.5 V hysteresis (turn-on at 10.5–12.6 V, turn-off at 9.0–11.0 V), enabling reliable startup and brownout protection in 12 V/24 V automotive systems without external supervision circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	12.5 V to 24 V - supports direct connection to automotive battery rails including cold-crank (≥12.5 V min) and load-dump tolerant operation
I_O (pulsed)	6 A per channel - enables direct driving of large gate capacitances (e.g., >5 nF) without external buffers in DC-DC and motor control
R_DS(on) (max)	0.65 Ω at +125°C - ensures <400 mW conduction loss per channel at 6 A, critical for thermal management in sealed enclosures
t_ON/t_OFF	40 ns / 55 ns max - guarantees sub-100 ns total propagation delay for precise PWM timing in synchronous rectifiers and phase-shifted converters
UVLO Threshold	10.5–12.6 V turn-on, 9.0–11.0 V turn-off - prevents erratic switching during battery voltage sag below functional minimum
Input Hysteresis	0.8 V on INA/INB and EN - rejects noise on long harness traces in engine bay or chassis-mounted modules
Ambient Temp	−40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for under-hood and transmission control unit environments

Pinout & Package

Package: PSOIC-8N (Plastic Small Outline Integrated Circuit, 8-pin, narrow body, exposed pad not present). Dimensions per JEDEC MS-012, 1.27 mm pitch, 6.00 mm × 4.90 mm footprint.

Pin/Terminal	Circuit Role	Design Meaning
1 (EN)	Enable control input	Active-high logic input with 0.8 V hysteresis; disables both outputs when low, reducing quiescent current to <1 µA
2 (INA)	Channel A logic input	CMOS Schmitt-triggered input; drives OUTA in-phase; compatible with 3.3 V/5 V microcontrollers and isolated gate drivers
3 (COM)	Power ground reference	Common return path for V_CC, inputs, and outputs; must be low-inductance connection to system power ground plane
4 (INB)	Channel B logic input	CMOS Schmitt-triggered input; drives OUTB in-phase; independently controllable from INA for asymmetric PWM or dead-time insertion
5 (OUTB)	Channel B gate drive output	Low-side N-channel driver output; rated for 6 A pulsed sink/source; connects directly to MOSFET gate via external R_g (2.5 Ω typical)
6 (V_CC)	Supply voltage input	12.5–24 V input with internal UVLO; requires ≥1 µF X7R ceramic bypass capacitor between V_CC and COM
7 (OUTA)	Channel A gate drive output	Low-side N-channel driver output; electrically matched to OUTB for <1 ns skew in dual-channel operation
8 (NC)	No connection	Internally unconnected pin; must remain floating or tied to COM only if required by PCB layout for mechanical stability

Key Features

Feature	Design Value
Dual-channel propagation delay matching	≤1 ns skew between OUTA/OUTB enables precise synchronous switching in full-bridge and LLC resonant converters
Integrated UVLO with hysteresis	1.5 V hysteresis prevents oscillation during marginal V_CC conditions; eliminates need for external supervisor IC
CMOS Schmitt-trigger inputs	0.8 V input hysteresis rejects >100 mV peak-to-peak noise on 1 m harness runs in 12 V vehicle systems
High-temperature output resistance spec	650 mΩ max at +125°C ensures predictable gate drive strength and thermal derating in under-hood applications
Automotive qualification	AEC-Q100 Grade 1 certified with HTOL, TC, and ESD testing - validated for 15-year service life in safety-critical power modules

Applications

Automotive DC-DC Converters

Hybrid Powertrain Inverters

Use Scenario: Secondary-side synchronous rectification in 48 V–12 V bidirectional buck-boost converters for mild-hybrid vehicles.

IC Role / Device Role / Timing Role: Dual low-side driver controlling parallel N-channel MOSFETs on low-voltage rail; matched t_ON/t_OFF ensures zero-voltage switching alignment.

Use Value: Reduces conduction losses by >35% vs. diode rectification; enables >95% efficiency at 5 kW output with <0.65 Ω R_DS(on).

Use Scenario: Gate driving of traction inverter half-bridge legs in P2/P3 hybrid architectures with 12 V auxiliary supply.

IC Role / Device Role / Timing Role: Low-side driver for IGBT/MOSFET pairs in motor phase legs; EN pin synchronizes with MCU safety state machine.

Use Value: UVLO and thermal-rated R_DS(on) prevent shoot-through during battery voltage transients; AEC-Q100 compliance meets ASIL-B requirements.

Bridge-Tied Load Drivers

Gate Transformer Drivers

Use Scenario: Driving push-pull gate transformers in isolated DC-DC modules for battery management system (BMS) isolation barriers.

IC Role / Device Role / Timing Role: Dual in-phase driver supplying complementary signals to transformer primary; matched delay minimizes flux imbalance.

Use Value: 40 ns t_ON enables >1 MHz operation; low output resistance sustains >2 A peak current into transformer leakage inductance.

Use Scenario: Driving center-tapped gate drive transformers in high-reliability industrial UPS inverters using automotive-grade components.

IC Role / Device Role / Timing Role: Low-side driver generating balanced, high-slew-rate gate pulses; Schmitt inputs reject common-mode noise from transformer coupling.

Use Value: 0.8 V input hysteresis maintains clean edge integrity despite >1 kV/ns dV/dt across isolation barrier; PSOIC-8N package supports IPC-7351B creepage standards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-side gate driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM5113SDX/NOPB	Higher V_CC max (36 V), but no integrated UVLO hysteresis; 5 A peak output, 1.2 Ω R_DS(on) at +125°C	Targeted at industrial DC-DC; lacks AEC-Q100 qualification and automotive temp range	Select for non-automotive 24–36 V systems requiring wider supply margin
UCC27524DGNR	4 A peak output, 0.9 Ω R_DS(on) at +125°C, no enable pin or UVLO; 12 V max V_CC	Designed for consumer/commercial SMPS; not qualified for automotive temperature or reliability stress tests	Select for cost-sensitive 12 V applications where AEC-Q100 is not required

Compared with LM5113SDX/NOPB and UCC27524DGNR, the AUIRB24427STR uniquely combines automotive qualification, matched dual-channel timing, integrated UVLO with hysteresis, and 6 A pulsed drive capability within a 24 V supply envelope-making it the only option qualified for under-hood hybrid powertrain gate driving.

Availability

AUIRB24427STR is available at Aetrix Electronics and suitable for automotive DC-DC converters, hybrid powertrain inverters, and bridge-tied gate transformer drivers requiring stable component supply across extended product lifecycles.

Supply support for AUIRB24427STR 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 global semiconductor leader specializing in power management, automotive electronics, and industrial control solutions, with core expertise in high-reliability silicon and wide-bandgap devices.

The AUIRB24427STR belongs to Infineon's automotive-grade gate driver portfolio, engineered specifically for robust, low-latency MOSFET/IGBT control in electrified vehicle subsystems operating under harsh thermal and electrical conditions.

FAQ

What is the maximum allowable gate resistance (R_g) for stable operation?

The datasheet specifies R_g = 2.5 Ω as typical for optimal rise/fall time and EMI control. While higher values reduce dV/dt, exceeding 10 Ω increases switching losses and risks shoot-through in bridge configurations due to delayed turn-off. Stability is maintained up to 15 Ω with CL ≤ 4700 pF and proper PCB layout.

Does the NC pin require any PCB routing or grounding?

Pin 8 (NC) is internally unconnected and must remain electrically floating. It may be left unmasked on the solder paste layer or tied to COM solely for mechanical reinforcement-no electrical connection is permitted. Routing traces to this pin violates JEDEC PSOIC-8N layout guidelines and risks internal shorting.

Can AUIRB24427STR drive SiC MOSFETs directly?

Yes, but with design constraints: its 6 A peak output and 0.65 Ω R_DS(on) support gate charge (Q_g) ≤ 45 nC at 15 V V_GS. For SiC devices with Q_g > 60 nC, external buffer stages are recommended. The 24 V V_CC rating allows full −5 V/+20 V gate bias generation with external level-shifting circuitry.

How does the enable function interact with UVLO during startup?

EN is asynchronous and overrides UVLO: if EN is low during V_CC ramp-up, outputs remain disabled until EN goes high-even if V_CC exceeds 12.6 V. Once enabled, UVLO takes precedence: if V_CC drops below 9.0 V, outputs disable immediately regardless of EN state, ensuring fail-safe shutdown during brownout.

AUIRB24427STR Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Driven Configuration:: Low-Side

Channel Type:: Independent

Number of Drivers:: 2

Gate Type:: N-Channel MOSFET

Voltage - Supply:: 5V ~ 20V

Logic Voltage - VIL, VIH:: 0.8V, 2.5V

Current - Peak Output (Source, Sink):: 6A, 6A

Input Type:: Non-Inverting

High Side Voltage - Max (Bootstrap):: -

Rise / Fall Time (Typ):: 33ns, 33ns (Max)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8-9

AUIRB24427STR FAQ

1.How can I place an order for AUIRB24427STR through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRB24427STR 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 AUIRB24427STR reliable?

The price and inventory of AUIRB24427STR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRB24427STR is usually 5 days.

3.What payment methods are accepted for AUIRB24427STR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRB24427STR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRB24427STR?

AUIRB24427STR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRB24427STR 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 AUIRB24427STR?

For technical support, including AUIRB24427STR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRB24427STR requirements.

6.How does Aetrix verify that AUIRB24427STR is sourced from the original manufacturer or authorized distributors?

All AUIRB24427STR 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 AUIRB24427STR meets industry standards.

7.What is the process for return or replacement of AUIRB24427STR?

All AUIRB24427STR units undergo pre-shipment inspection (PSI). If there is an issue with AUIRB24427STR, 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 AUIRB24427STR part is unused and in its original packaging.

Return procedure for AUIRB24427STR:

1.Submit a request within 90 days.

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

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