Infineon AUIRS2301STR: Powering the Heart of Modern Three-Phase Systems

In the realm of industrial automation, automotive systems, and high-power motor control, the efficient and reliable management of three-phase power is paramount. At the core of these advanced systems lies a critical component: the gate driver IC. The Infineon AUIRS2301STR stands out as a highly integrated solution engineered specifically for this demanding task, serving as a robust high and low side driver for three-phase inverter topologies.

This driver IC is designed to control the six MOSFETs or IGBTs that form a standard three-phase bridge. Its primary function is to translate low-power logic signals from a microcontroller (MCU) into the high-current, high-voltage pulses necessary to rapidly switch these power transistors on and off. The AUIRS2301STR excels in this role by integrating three independent half-bridge channels, each capable of driving both the high-side and low-side switch of a single phase leg. This integration significantly reduces component count, simplifies board layout, and enhances overall system reliability.

Key to its performance in high-noise environments are its advanced level-shift technology and robust isolation. The high-side drivers must operate at the rapidly switching phase node voltage, which can swing hundreds of volts in nanoseconds. The AUIRS2301STR's level-shifter is designed to reliably transmit control signals across this voltage domain while rejecting harmful transient noise that could cause catastrophic shoot-through conditions. Furthermore, it features a built-in dead time generation function, which is crucial for preventing cross-conduction. This hardware-based feature ensures that the high-side and low-side switches in a leg are never on simultaneously, even in the event of a faulty MCU signal, thereby safeguarding the power stage.

The device also incorporates comprehensive protection features that are essential for industrial-grade durability. These include undervoltage lockout (UVLO) for both the high-side and low-side sections, which ensures the power switches are only driven when the gate supply voltage is sufficient for a full enhancement, minimizing conduction losses and preventing thermal runaway. Its matched propagation delays across all channels ensure precise timing, which is critical for maintaining clean sinusoidal output waveforms and high-efficiency motor operation.

Typical applications leveraging the strengths of the AUIRS2301STR include industrial motor drives, HVAC systems, robotics, and automotive electric power steering (EPS). Its ability to operate at high voltages and its robust design make it an ideal choice for systems that demand longevity, efficiency, and resilience against electrical stressors.

ICGOO

The Infineon AUIRS2301STR is a cornerstone component for modern three-phase power conversion. Its integrated design, robust protection suite, and reliable high-voltage operation make it an indispensable solution for engineers developing high-performance, efficient, and safe motor control and inverter systems.

Keywords:

Three-Phase Driver

Gate Driver IC

Half-Bridge Driver

Motor Control

High-Voltage Level Shifter