Infineon AUIRS2123STR: A High-Performance Three-Phase Motor Driver IC

The evolution of motor control systems demands integrated solutions that offer both high performance and robust reliability. The Infineon AUIRS2123STR stands out as a monolithic integrated driver IC specifically engineered for three-phase motor control applications. This device is designed to drive both high-side and low-side N-channel power MOSFETs or IGBTs arranged in a three-phase bridge configuration, making it a cornerstone in modern inverter designs for industrial motor drives, HVAC systems, and automotive applications.

A key strength of the AUIRS2123STR lies in its high level of integration. It incorporates three independent high-side and low-side driver channels with their own internal level-shifters and dedicated bootstrap functionality. This architecture significantly simplifies the design process by reducing the need for numerous external components. The built-in cross-conduction prevention logic ensures that the high-side and low-side switches of the same phase are never turned on simultaneously, a critical feature for protecting the power switches from destructive shoot-through currents.

The driver is renowned for its robustness and protective features. It operates over a wide voltage range and is capable of withstanding negative transient voltages, which are common in harsh electrical environments like automotive systems. The IC includes under-voltage lockout (UVLO) protection for both the high-side and low-side sections, safeguarding the motor and the power switches from operating under insufficient voltage conditions that could lead to excessive heat generation. Furthermore, its matched propagation delays for all channels ensure accurate switching and help maintain the integrity of the output waveforms.

Another significant advantage is its high noise immunity. The logic inputs are compatible with standard CMOS and LSTTL outputs, down to 3.3V, allowing for direct interfacing with microcontrollers and DSPs without the need for additional signal conditioning. This makes the AUIRS2123STR an ideal interface between a low-power control circuit and a high-power three-phase motor.

ICGOODFIND: The Infineon AUIRS2123STR is a highly integrated and robust three-phase driver IC that simplifies design, enhances system reliability, and provides essential protection features. It is an optimal solution for developers seeking to build efficient and durable motor control systems for a wide array of industrial and automotive applications.

Keywords:

Three-Phase Motor Control

High-Side and Low-Side Driver

Bootstrap Functionality

Cross-Conduction Prevention

Under-Voltage Lockout (UVLO)