Infineon TLE7189FXUMA2: High-Current Half-Bridge Driver for Automotive Motor Control Applications

The evolution of automotive systems towards electrification demands robust, efficient, and intelligent power management solutions. At the heart of many advanced driver-assistance systems (ADAS), engine management units, and comfort applications lies the precise control of electric motors. The Infineon TLE7189FXUMA2 emerges as a pivotal component designed to meet these stringent requirements, offering a high-current, half-bridge driver specifically engineered for the challenging automotive environment.

This driver IC is capable of controlling both high-side and low-side N-channel MOSFETs in a half-bridge configuration, a fundamental topology for driving DC brush, brushless DC (BLDC), and stepper motors. Its standout feature is its impressive output current capability, delivering peak source currents of up to +1.0 A and sink currents of -1.8 A. This high drive strength ensures swift switching of large power MOSFETs, minimizing transition times and significantly reducing switching losses, which is crucial for improving overall system efficiency and thermal performance.

Beyond raw power, the TLE7189FXUMA2 is built for exceptional robustness and reliability. It incorporates a comprehensive suite of protection features that are essential for automotive safety and longevity. These include undervoltage lockout (UVLO) for both the low-side and high-side supplies, preventing MOSFET operation in unsafe conditions, and overcurrent protection (OCP) with a precise current sense feedback mechanism. Furthermore, it boasts advanced over-temperature shutdown protection, safeguarding the IC and the entire power stage from thermal overload. Its high immunity to negative voltage spikes at the VS pin, a common occurrence in inductive load switching, ensures stable operation in the electrically noisy environment of a vehicle.

Integration is another key strength. The device operates from a single supply voltage and includes a charge pump for the high-side drive, enabling 100% duty cycle operation—a critical requirement for many motor control applications. Communication with a host microcontroller is simplified through a 3.3 V/5 V compatible SPI interface. This digital interface allows for detailed diagnostics and real-time monitoring of parameters like temperature and fault status, enabling predictive maintenance and enhanced system control.

Housed in a PG-VDSON-24-13 thermally enhanced package, the TLE7189FXUMA2 offers excellent thermal conductivity, which is vital for dissipating heat generated during high-current operation. Its design and manufacturing process adhere to the rigorous AEC-Q100 standard, guaranteeing its performance and quality for automotive applications.

ICGOOODFIND: The Infineon TLE7189FXUMA2 stands out as a highly integrated, robust, and powerful half-bridge driver. Its combination of high-current output, extensive protective features, diagnostic capabilities, and automotive-grade qualification makes it an ideal solution for demanding motor control applications in modern vehicles, from electric power steering and throttle control to advanced pump and fan systems.

Keywords: Automotive Motor Control, Half-Bridge Driver, High-Current Driver, SPI Interface, AEC-Q100.