Infineon AUIRS2191STR: High- and Low-Side Driver IC for Automotive and Industrial Applications

The demand for robust and reliable motor control, power conversion, and solenoid driving solutions in automotive and industrial systems continues to escalate. Addressing this need, the Infineon AUIRS2191STR emerges as a highly integrated, high-performance driver IC designed specifically to manage both high-side and low-side N-channel IGBTs and MOSFETs in a single, compact package. This device is engineered to excel in the most demanding environments, offering exceptional electrical characteristics and protective features.

A key strength of the AUIRS2191STR lies in its robust 600V rated voltage capability, which provides a significant safety margin and ensures reliable operation in high-voltage applications such as industrial motor drives, automotive pumps, and compressors. Its 3.3V, 5V, and 15V input logic compatibility allows for seamless interfacing with a wide range of microcontrollers (MCUs) and digital signal processors (DSPs), simplifying system design and reducing the need for additional level-shifting components.

The IC incorporates a sophisticated level-shifting technique for the high-side channel, enabling efficient operation with bootstrap circuitry. This design is optimized for very high dV/dt immunity, which is critical for preventing false triggering and ensuring stable switching in noisy electrical environments. Furthermore, the driver features a matched propagation delay between the high-side and low-side channels (typically 150ns), which is essential for minimizing dead time and maximizing the efficiency of the power stage in half-bridge configurations.

To guarantee maximum system safety and longevity, the AUIRS2191STR is equipped with comprehensive protection functions. An integrated undervoltage lockout (UVLO) circuit monitors both the high-side and low-side supply voltages, preventing the power switches from operating in a condition that could lead to excessive power dissipation and potential failure. The innovative shutdown pin allows for the immediate disabling of both channels upon a fault detection signal from an external controller.

Packaged in a space-saving SO-8, this driver IC is not only powerful but also facilitates compact PCB design. Its AEC-Q100 qualification for automotive applications underscores its suitability for use in under-the-hood systems, electric power steering, and thermal management, where quality and reliability are non-negotiable.

ICGOOODFIND: The Infineon AUIRS2191STR is a superior high- and low-side driver IC that delivers high noise immunity, robust 600V operation, and critical protection features. Its compatibility with standard logic levels and its automotive-grade qualification make it an ideal, reliable choice for advanced automotive and industrial power systems requiring compact and efficient half-bridge control.

Keywords: Half-Bridge Driver, 600V Rating, dV/dt Immunity, Undervoltage Lockout (UVLO), AEC-Q100 Qualified.