Infineon AUIRS2117STR: A High-Performance High- and Low-Side Driver IC for Demanding Applications

In the realm of power electronics, the efficient and reliable control of MOSFETs and IGBTs is paramount. The Infineon AUIRS2117STR stands out as a monolithic high- and low-side driver IC specifically engineered to meet the rigorous demands of motor control and power conversion systems. This robust driver integrates advanced functionalities to simplify design, enhance performance, and ensure maximum system protection.

A key strength of the AUIRS2117STR lies in its high noise immunity and robust operational performance. It is designed to operate with high-side voltages up to 600V, making it suitable for a wide range of industrial and automotive applications. The driver features a typical source/sink current capability of 2.9A and 2.5A respectively, enabling fast switching of power transistors. This minimizes switching losses, which is critical for improving overall system efficiency and thermal management, particularly in high-frequency switch-mode power supplies (SMPS) and motor drives.

The IC incorporates a floating channel designed for bootstrap operation, which simplifies the power supply design for the high-side section. This eliminates the need for an isolated DC-DC converter, reducing both component count and board space. Furthermore, the AUIRS2117STR is equipped with comprehensive protection features. These include integrated dead-time control (DT) to prevent shoot-through currents that can destroy power devices, and an undervoltage lockout (UVLO) circuit for both the high-side and low-side sections. This ensures the power switches only operate under safe conditions, significantly enhancing system reliability.

Precise propagation delays and excellent matching between the two channels ensure accurate control, which is essential for applications like three-phase motor inverters. The driver's minimal susceptibility to dv/dt transients prevents false triggering in electrically noisy environments, a common challenge in motor control and industrial automation.

ICGOOODFIND: The Infineon AUIRS2117STR is an exceptional high- and low-side driver that delivers robust performance, integrated protection, and design simplification. It is an optimal choice for engineers developing high-efficiency, reliable systems for motor control, industrial drives, and advanced power conversion applications.

Keywords: High- and Low-Side Driver, Bootstrap Operation, Integrated Dead-Time, High Noise Immunity, Motor Control.