Infineon Technologies AUIRS4427S

Overview

AUIRS4427S from Infineon Technologies (formerly International Rectifier) is an automotive-qualified dual low-side gate driver IC for power MOSFETs and IGBTs, featuring matched 50 ns propagation delays, 2.3 A/3.3 A peak source/sink output current, and 6–20 V gate drive supply range. It supports push-pull DC-DC converters and hybrid powertrain drives with CMOS/Schmitt-triggered 3.3 V/5 V logic-compatible inputs and in-phase outputs.

For engineers reviewing the AUIRS4427S datasheet, AUIRS4427S pinout, AUIRS4427S application, or AUIRS4427S equivalent, key selection criteria include automotive AEC-Q100 qualification, matched channel timing, SOIC8N package thermal resistance (200 °C/W), and latch-immune monolithic CMOS construction for high-reliability power stage control.

Technical Context

The AUIRS4427S integrates two independent, latch-immune CMOS drivers with matched propagation delay (50 ns typ.) and symmetrical rise/fall times (25–55 ns). Each channel delivers 2.3 A source and 3.3 A sink pulsed current into capacitive loads up to 1000 pF under 15 V VCC.

Input logic thresholds are fixed at VIH ≥ 2.5 V and VIL ≤ 0.8 V, compatible with both 3.3 V and 5 V microcontrollers. The device operates across –40 °C to +125 °C ambient and includes ESD protection per AEC-Q100: HBM Class H3A (±4000 V), CDM Class C5 (±1000 V), and latch-up Class II Level B.

Key Specifications

Pinout & Package

Package: SOIC8N (Small Outline Integrated Circuit, 8-pin, narrow body, 1.27 mm pitch, RoHS-compliant lead-free finish).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2007PBF and LM5113SD, the AUIRS4427S uniquely combines AEC-Q100 qualification, matched 50 ns delays, and true dual low-side independence-making it the only option validated for synchronized push-pull DC-DC and hybrid powertrain gate drive where channel timing skew must be minimized.

Availability

AUIRS4427S is available at Aetrix Electronics and suitable for automotive DC-DC converters, hybrid powertrain drives, and direct fuel injection systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AUIRS4427S 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 heritage from International Rectifier's high-performance power IC portfolio.

The AUIRS4427S belongs to Infineon's automotive-grade gate driver product line, engineered specifically for high-reliability, high-noise immunity power stage control in engine management, electrified powertrains, and safety-critical 12 V/48 V systems.

FAQ

Is the AUIRS4427S pin-compatible with the AUIRS4427?

Yes, the AUIRS4427S is the SOIC8N packaged variant of the AUIRS4427, sharing identical pinout, electrical specifications, and functional behavior. The "S" suffix denotes the narrow-body SOIC package (3.9 mm width), while the base AUIRS4427 may refer to legacy packaging variants; both use the same die and pin assignment.

What is the maximum allowable gate capacitance this driver can switch effectively?

With 2.3 A source and 3.3 A sink current and 50 ns typical propagation delay, the AUIRS4427S is optimized for MOSFETs with total gate charge (Qg) ≤ 100 nC at 15 V VGS. For example, driving a 60 V, 5 mΩ MOSFET (Qg ≈ 75 nC) achieves <100 ns turn-on time with 10 Ω external gate resistor.

Does the AUIRS4427S require external bootstrap components?

No. The AUIRS4427S is a dual low-side driver only and does not incorporate high-side floating channel circuitry. It operates entirely referenced to COM (power ground) and requires no bootstrap diodes, capacitors, or level-shifting networks-unlike half-bridge or high-side drivers.

Can the AUIRS4427S drive IGBTs directly?

Yes, the AUIRS4427S is explicitly rated for IGBT gate drive per its datasheet description and dynamic characteristics. Its 3.3 A sink current supports fast IGBT turn-off (critical for short-circuit protection), and the 6–20 V VCC range accommodates standard IGBT gate-emitter voltage requirements (typically ±15 V).