Infineon Technologies AUIRS2112S

Overview

AUIRS2112S from Infineon Technologies (formerly International Rectifier) is an automotive-grade high- and low-side gate driver IC designed to independently drive N-channel IGBTs and MOSFETs in half-bridge configurations. It features 600 V floating channel capability, matched 140 ns propagation delays, 290 mA/600 mA peak output current, and 3.3 V logic compatibility - enabling robust control in diesel common rail injection systems.

For engineers reviewing the AUIRS2112S datasheet, AUIRS2112S pinout, AUIRS2112S application, or AUIRS2112S equivalent, key selection criteria include VS transient tolerance (50 V/ns), dual UVLO thresholds (VBSUV± = 7.0–9.6 V), logic/power ground offset (±5 V), and SOIC-16W package thermal resistance (RthJA = 100 °C/W).

Technical Context

The AUIRS2112S integrates a high-voltage level-shifting circuit with latch-immune CMOS technology to sustain operation at VS up to +600 V while maintaining logic integrity during fast dV/dt transients. Its floating channel uses bootstrap biasing and includes dedicated undervoltage lockout for both VBS and VCC supplies.

Input stages employ Schmitt-triggered CMOS logic with pull-down resistors and shutdown control, while output drivers deliver symmetrical rise/fall times (tr = 60 ns, tf = 30 ns) and phase-aligned outputs. The device supports independent logic supply (VDD = 3.3–20 V) referenced to VSS, which may be offset ±5 V from COM.

Key Specifications

Pinout & Package

Package: 16-lead SOIC wide-body (SOIC-16W), RoHS-compliant, MSL3, rated for automotive temperature range (−40°C to +125°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2112PbF, AUIRS2112S adds automotive qualification and tighter thermal limits; versus UCC27211D, it provides true dual-channel integration and bootstrap monitoring - reducing BOM count and improving reliability in safety-critical power stages.

Availability

AUIRS2112S is available at Aetrix Electronics and suitable for diesel injection systems, electric power steering modules, onboard chargers, and 48 V mild hybrid converters requiring stable component supply across automotive production lifecycles.

Supply support for AUIRS2112S 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.

The AUIRS2112S belongs to Infineon's automotive-qualified HVIC gate driver family, engineered specifically for high-reliability, high-voltage motor control and power conversion in engine management and electrified vehicle subsystems.

FAQ

What is the maximum allowable dV/dt on the VS pin?

The AUIRS2112S is rated for 50 V/ns dV/dt on the VS pin under recommended operating conditions. This specification is verified per AEC-Q100 test methods and ensures reliable operation during fast switching transients in inductive loads such as fuel injectors and motor windings. Exceeding this rate may cause false triggering or latch-up.

Can VDD and VCC be supplied from the same 15 V rail?

Yes - VDD and VCC may share a 15 V supply, provided VSS remains within ±5 V of COM. The datasheet explicitly permits this configuration, and the internal logic supply regulator tolerates VDD = VCC. However, separate decoupling capacitors are required at each pin to suppress noise coupling between power and logic domains.

Is a bootstrap diode required for the VBS supply?

Yes - an external fast-recovery bootstrap diode (e.g., 1N4148WS or equivalent) is mandatory between VCC and VB to charge the bootstrap capacitor during LO conduction. The AUIRS2112S does not integrate this diode; omission will prevent high-side operation due to insufficient VBS voltage during sustained high-side duty cycles.

Does the AUIRS2112S support 5 V logic inputs?

Yes - the HIN, LIN, and SD inputs accept 5 V logic levels. VIH is guaranteed ≥9.5 V at VDD = 15 V, but the Schmitt-triggered inputs function correctly with 5 V TTL/CMOS signals when VDD ≥ 5 V. For 3.3 V logic, VDD must be set to 3.3 V; the device supports mixed-voltage logic interfacing via its independent VDD pin.