Infineon Technologies AUIRS2123S

Overview

AUIRS2123S from Infineon Technologies is an automotive-qualified high-side gate driver IC designed to control N-channel MOSFETs/IGBTs in floating high-voltage configurations up to +600 V. It features CMOS Schmitt-triggered inputs with internal pull-down, in-phase output logic, 10–20 V gate drive supply range, 500 mA peak output current, and integrated undervoltage lockout for VCC and VBS.

For engineers reviewing the AUIRS2123S datasheet, AUIRS2123S pinout, AUIRS2123S application, or AUIRS2123S equivalent, key selection criteria include its 140 ns typical propagation delay, dV/dt immune floating channel, RESET- input compatible with 3.3 V/5 V logic, SOIC-8 automotive package, and qualification per AEC-Q100 Grade 1 (−40 °C to +125 °C).

Technical Context

The AUIRS2123S implements a monolithic high-voltage IC (HVIC) architecture with latch-immune CMOS process technology, enabling robust operation under fast transient conditions. Its floating channel uses level-shifting circuitry referenced to VS, supporting bootstrap gate drive topologies where VB can swing up to 625 V relative to COM.

Internal UVLO monitors both VCC (7.2–9.6 V thresholds) and VBS (6.6–9.0 V), preventing erroneous output during supply brownout. The RESET- input provides asynchronous forced output disable with 125 µA pull-down current at 5 V, ensuring fail-safe shutdown in safety-critical automotive inverters and SMPS.

Key Specifications

Pinout & Package

Package: 8-Lead SOIC (Small Outline Integrated Circuit), RoHS-compliant, MSL3 per J-STD-020, footprint compatible with industry-standard SOIC-8 PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2123S and UCC27531DR, the AUIRS2123S uniquely delivers automotive-qualified, self-contained high-side drive up to 600 V with integrated RESET and dual UVLO-eliminating need for external fault management circuitry in engine control units.

Availability

AUIRS2123S is available at Aetrix Electronics and suitable for automotive injection systems, on-board chargers, and HVAC inverters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AUIRS2123S 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 electronics, and industrial control ICs, with global R&D and manufacturing infrastructure.

The AUIRS2123S belongs to Infineon's Automotive High-Voltage IC family, engineered specifically for robust high-side gate driving in engine control, traction inverters, and 48 V hybrid systems.

FAQ

What is the purpose of the RESET- pin on the AUIRS2123S?

The RESET- pin is an active-low asynchronous input that forces the HO output low regardless of the IN signal state. It draws 125 µA when pulled to 5 V and is compatible with standard 3.3 V or 5 V CMOS logic. This feature enables immediate fault shutdown in safety-critical automotive applications such as fuel injection or inverter overcurrent events.

Can the AUIRS2123S drive a 600 V IGBT directly?

Yes-the AUIRS2123S is rated for up to +600 V offset voltage (VS) and provides 500 mA peak gate drive current, sufficient to charge/discharge typical 600 V IGBT gates with ≤10 nF total gate capacitance. Its dV/dt immunity (±50 V/ns) and floating channel ensure reliable operation even during fast switching transitions in high-voltage inverters.

How does the AUIRS2123S differ from the AUIRS2124S?

The AUIRS2123S has an internal pull-down on the IN pin and in-phase output logic, plus a dedicated RESET- input. The AUIRS2124S features internal pull-up on IN and out-of-phase output logic, with no RESET pin. Both share identical HV ratings, timing, and package-but differ in input configuration and fault-handling capability.

Is a bootstrap diode required when using the AUIRS2123S?

Yes-a fast recovery or Schottky bootstrap diode is required between VCC and VB to charge the floating supply capacitor during low-side conduction. Typical values are 1N4148W or PMEG4010AEB, selected for low forward voltage and reverse recovery time <50 ns to maintain VBS stability under high-frequency PWM operation.