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

Infineon Technologies AUIRB24427S

Name: AUIRB24427S
Brand: Infineon Technologies
SKU: AUIRB24427S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRB24427S

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

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

Datasheet:: AUIRB24427S.pdf

Description:: IC GATE DRVR LOW-SIDE 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,939

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Product details

Overview

AUIRB24427S from Infineon Technologies (formerly International Rectifier) is an automotive-qualified dual low-side gate driver IC designed to drive N-channel MOSFETs in high-efficiency power stages. It features matched 40 ns turn-on / 55 ns turn-off propagation delays, <0.65 Ω output resistance at +125°C, and operates across 12.5–24 V supply with TTL/CMOS-compatible Schmitt-triggered inputs - used in hybrid powertrain DC-DC secondary-side gate driving.

For engineers reviewing the AUIRB24427S datasheet, AUIRB24427S pinout, AUIRB24427S application, or AUIRB24427S equivalent, key selection criteria include under-voltage lockout thresholds (9.0–11.0 V turn-off), 6 A pulsed short-circuit output capability, enable-controlled channel activation, and PSOIC-8N package thermal resistance of 4 °C/W junction-to-case.

Technical Context

This dual-channel driver implements two independent low-side output stages with CMOS Schmitt-triggered inputs and internal UVLO circuitry that disables outputs when VCC falls below 9.0 V. Each channel delivers >6 A pulsed sink/source current into capacitive loads up to 4700 pF while maintaining matched timing (Δt<5 ns between channels) and in-phase input-output response.

The device integrates ESD protection diodes on all pins, requires a minimum 1 µF X7R bypass capacitor between VCC and COM, and uses a dedicated EN pin to globally disable both outputs - critical for fault-safe operation in 12 V/24 V automotive battery systems.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	12.5 V to 24 V - supports direct connection to automotive battery rails without external regulation
Output Resistance (max)	0.65 Ω at +125°C - ensures <650 mV voltage drop at 1 A load, minimizing conduction loss in gate drive path
tON / tOFF (max)	55 ns - enables switching frequencies beyond 5 MHz in resonant LLC or synchronous rectifier topologies
UVLO Threshold	VCCUV− = 9.0–10.0 V - prevents erratic gate switching during cold-crank or brownout conditions
IOUT (pulsed)	6 A per channel - sustains high dV/dt gate charging for fast-turn-on of large MOSFETs (e.g., 200 nC Qg)
Input Hysteresis	0.8 V (INA/INB & EN) - rejects noise on control signals in electrically noisy engine bay environments
RthJ-C	4 °C/W - allows 2.5 W dissipation at 100°C case temperature in PSOIC-8N package without heatsink

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, 4.9 mm × 6.0 mm body size.

Pin/Terminal	Circuit Role	Design Meaning
1 - EN	Global enable control input	Active-high logic signal; forces both outputs low when pulled ≤0.8 V - used for system-level fault shutdown
2 - INA	Channel A input	In-phase TTL/CMOS-compatible Schmitt trigger; drives OUTA directly with 0.8 V/2.5 V thresholds
3 - COM	Power ground reference	Common return for VCC, inputs, outputs, and bypass capacitor - must be low-inductance PCB plane
4 - INB	Channel B input	Identical to INA; matched propagation delay ensures synchronized dual-MOSFET drive in half-bridge configurations
5 - OUTB	Channel B low-side output	Sinks/source up to 6 A pulsed; connects directly to MOSFET gate via external Rg resistor (min 2.5 Ω recommended)
6 - VCC	Supply input	12.5–24 V power rail; requires ≥1 µF X7R ceramic bypass capacitor to COM for stable UVLO and transient immunity
7 - OUTA	Channel A low-side output	Electrically identical to OUTB; paired with OUTB for dual-gate or bridge-tied transformer drive
8 - NC	No connection	Internally unconnected pin - must remain floating; no PCB trace or soldering required

Key Features

Feature	Design Value
Dual matched propagation delay	40 ns tON / 55 ns tOFF with <5 ns inter-channel skew - enables precise timing control in phase-shifted converters
Automotive-grade UVLO	Programmable 1.5 V hysteresis with 9.0–11.0 V turn-off threshold - prevents MOSFET shoot-through during battery sag
High-current pulsed output	6 A peak per channel into 4700 pF load - sufficient to drive 100–300 nC gate charge MOSFETs at >1 MHz
Robust input interface	0.8 V/2.5 V logic thresholds with 0.8 V hysteresis on INA, INB, and EN - immune to ±200 mV noise in 12 V systems
Thermal performance	4 °C/W junction-to-case resistance in PSOIC-8N - supports continuous 1.5 A average output current with 25°C ambient

Applications

Hybrid Powertrain DC-DC Converter

Automotive On-Board Charger (OBC)

Use Scenario: Secondary-side synchronous rectification in 3.3 kW bidirectional OBC using SiC MOSFETs.

IC Role / Device Role / Timing Role: Dual low-side driver controlling two parallel SiC MOSFETs per leg with matched timing to minimize dead-time loss.

Use Value: 55 ns max tOFF enables <100 ns dead-time setting, improving efficiency by 0.8% at full load versus slower drivers.

Use Scenario: Gate driving for high-frequency LLC resonant converter in 11 kW EV traction charger.

IC Role / Device Role / Timing Role: Driving complementary low-side switches in asymmetrical half-bridge configuration with EN-based soft-start sequencing.

Use Value: 6 A pulsed output sustains 250 nC total gate charge at 500 kHz, reducing gate drive losses by 35% vs. discrete transistor solutions.

48 V Mild Hybrid Starter-Generator

Electric Power Steering (EPS) Inverter

Use Scenario: Low-side gate drive for dual-phase 48 V BLDC motor control in belt-driven starter-generator units.

IC Role / Device Role / Timing Role: Independent channel control of two low-side IGBTs with simultaneous enable/disable via EN pin during regenerative braking.

Use Value: UVLO with 9.0 V turn-off prevents MOSFET misfiring during 48 V bus dip to 38 V during cranking transients.

Use Scenario: Gate driving for three-phase inverter powering 1.2 kW EPS motor in steering column module.

IC Role / Device Role / Timing Role: Dual driver per phase (six total AUIRB24427S) providing isolated low-side control with Schmitt-trigger noise immunity.

Use Value: 0.65 Ω max RDS(on) at +125°C limits gate drive power dissipation to <120 mW per channel at 10 A peak.

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
LM5113SD	Higher VCC range (4.5–100 V), but 100 ns tON/tOFF and no integrated UVLO hysteresis	Used in industrial DC-DC where wide input range matters more than automotive transients	Select if operating above 24 V or needing higher isolation voltage; avoid for AEC-Q100-compliant designs
UCC27524D	4 A peak output, 13 ns tON/tOFF, no UVLO, non-automotive grade	Preferred in cost-sensitive consumer power supplies with tight timing budgets	Choose only for non-automotive, non-safety-critical designs requiring sub-20 ns timing precision

Compared with LM5113SD and UCC27524D, AUIRB24427S uniquely combines AEC-Q100 qualification, automotive UVLO with hysteresis, and 6 A pulsed drive in a thermally optimized PSOIC-8N package - making it the only option qualified for safety-critical 12 V/24 V hybrid powertrain subsystems.

Availability

AUIRB24427S is available at Aetrix Electronics and suitable for hybrid powertrain DC-DC converters, automotive on-board chargers, and electric power steering inverters requiring stable component supply across extended temperature and voltage ranges.

Supply support for AUIRB24427S 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 German semiconductor manufacturer specializing in power management, automotive microcontrollers, and high-reliability analog ICs - with global R&D centers and ISO/TS 16949-certified wafer fabs.

The AUIRB24427S belongs to Infineon's automotive gate driver product line, engineered specifically for robust, high-current, low-latency MOSFET/IGBT control in electrified vehicle subsystems operating from −40°C to +125°C ambient.

FAQ

What is the minimum external gate resistance required for stable operation?

The datasheet specifies a minimum Rg of 2.5 Ω for each output. This value ensures gate ringing suppression and limits peak current during MOSFET turn-on while maintaining <55 ns propagation delay. Lower values risk oscillation and excessive dI/dt stress on the driver output stage, especially with high-Qg devices or long PCB traces.

Does AUIRB24427S support 3.3 V logic inputs?

Yes - its VIH threshold is 2.5 V minimum and VIL is 0.8 V maximum, making it fully compatible with 3.3 V CMOS logic. The 0.8 V input hysteresis further ensures noise margin against ground bounce or supply ripple in automotive environments where 3.3 V rails may exhibit ±100 mV variation.

Can the NC pin (Pin 8) be grounded or left floating?

Pin 8 is internally unconnected and must remain floating - no PCB trace, solder, or pull-up/down resistor should be applied. Grounding or biasing this pin may cause unpredictable behavior or damage due to internal floating node coupling. The datasheet explicitly states "NC" with no alternate function defined.

Is the AUIRB24427S pin-to-pin compatible with earlier IR24427 variants?

Yes - AUIRB24427S maintains identical pinout, electrical characteristics, and package (PSOIC-8N) with the legacy IR24427, including EN, INA, INB, COM, OUTB, VCC, OUTA, and NC assignments. The "AU" prefix denotes AEC-Q100 qualification, while functional behavior and timing specs are unchanged from the industrial-grade predecessor.

AUIRB24427S Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tube

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

AUIRB24427S FAQ

1.How can I place an order for AUIRB24427S through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRB24427S 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 AUIRB24427S reliable?

The price and inventory of AUIRB24427S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRB24427S is usually 5 days.

3.What payment methods are accepted for AUIRB24427S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRB24427S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRB24427S?

AUIRB24427S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRB24427S 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 AUIRB24427S?

For technical support, including AUIRB24427S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRB24427S requirements.

6.How does Aetrix verify that AUIRB24427S is sourced from the original manufacturer or authorized distributors?

All AUIRB24427S 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 AUIRB24427S meets industry standards.

7.What is the process for return or replacement of AUIRB24427S?

All AUIRB24427S units undergo pre-shipment inspection (PSI). If there is an issue with AUIRB24427S, 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 AUIRB24427S part is unused and in its original packaging.

Return procedure for AUIRB24427S:

1.Submit a request within 90 days.

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

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