Infineon Technologies Tariff Inquiry

AUIRS2181S

AUIRS2181S Description

The AUIRS2181S from Infineon Technologies is a high-performance half-bridge gate driver IC designed for demanding power electronics applications. Housed in an 8-SOIC package, this obsolete (but still relevant for legacy designs) driver operates within a 10V to 20V supply range and supports 600V bootstrap voltage, making it suitable for high-voltage systems. It features two independent channels with inverting inputs, ensuring precise control of MOSFETs or IGBTs in half-bridge configurations. With peak output currents of 1.9A (source) and 2.3A (sink), it delivers robust switching performance, minimizing losses in high-frequency applications.

AUIRS2181S Features

• High-Side Voltage Capability: Supports up to 600V bootstrap voltage, ideal for high-voltage motor drives and inverters.
• Fast Switching: 15ns rise/fall times reduce switching losses, enhancing efficiency in high-frequency designs.
• Robust Drive Strength: 1.9A source / 2.3A sink current ensures quick turn-on/off of power switches.
• Inverting Input Logic: Simplifies interfacing with controllers using complementary signals.
• Independent Channels: Enables flexible half-bridge or low-side drive configurations.
• Wide Supply Range (10V–20V): Compatible with standard gate drive voltages.
• Surface-Mount Package (SOIC-8): Compact and suitable for automated assembly.

AUIRS2181S Applications

The AUIRS2181S excels in:

• Motor Drives: Efficiently controls IGBTs/MOSFETs in BLDC/PMSM motor controllers.
• Switched-Mode Power Supplies (SMPS): Optimizes high-voltage DC-DC converters.
• Inverters: Used in solar inverters and UPS systems for reliable high-side switching.
• Industrial Automation: Drives power stages in PLC systems and robotics.
• Legacy Designs: Suitable for maintaining or upgrading older systems requiring robust gate drivers.

Conclusion of AUIRS2181S

The AUIRS2181S is a versatile, high-voltage gate driver offering fast switching, strong drive capability, and flexible channel control. While marked obsolete, its performance remains competitive for motor drives, inverters, and industrial power systems. Engineers valuing reliability, efficiency, and high-voltage tolerance may still find it advantageous in legacy or niche applications. For new designs, Infineon’s modern alternatives should be evaluated, but the AUIRS2181S remains a proven solution for demanding power electronics.