Infineon TLE6710Q: High-Current Half-Bridge Driver for Automotive Motor Control Applications

The relentless drive towards enhanced vehicle electrification, comfort, and automation demands robust and intelligent control of a multitude of actuators. At the heart of many of these systems—from electronic throttle control and turbo actuators to HVAC flaps and pump controls—lies the critical need to accurately drive small DC motors. The Infineon TLE6710Q stands out as a premier solution engineered specifically for these demanding automotive environments.

This integrated circuit is a monolithic half-bridge driver capable of delivering continuous output currents up to 1.5 A and peak currents up to 3.5 A. This high-current capability allows it to directly drive a wide range of DC motors, solenoids, and other inductive loads, simplifying system design by reducing the need for additional discrete power components.

A cornerstone of the TLE6710Q's design is its robust protection and diagnostic features, which are paramount for achieving the high reliability and safety standards (ISO 26262) required in automotive applications. The device incorporates a comprehensive suite of safeguards, including:

Over-current Limitation (OCL): Protects the IC and the load from damage during short-circuit conditions.

Over-temperature Shutdown (OTSD): Prevents thermal overstress.

Under-voltage Lockout (UVLO): Ensures correct operation by disabling the outputs if the supply voltage is too low.

Active Free-Wheeling: Enhances efficiency and reduces electromagnetic interference (EMI) by providing a controlled path for the inductive load's recirculation current.

Diagnostics are communicated via a SPI interface (Serial Peripheral Interface), providing detailed feedback to the host microcontroller. This allows for real-time monitoring of system status, including bridge current measurement, overtemperature warnings, and open-load detection, enabling predictive maintenance and enhanced system control.

Built on Infineon's proven SPI / SMARTMOS technology, the TLE6710Q operates within a wide supply voltage range, typically from 5.5 V to 28 V, making it suitable for both 12 V and 24 V vehicle systems. Its ability to withstand load-dump and jump-start conditions ensures unwavering performance through the harsh electrical transients common in automobiles. Packaged in a space-saving PG-DSO-14 package, it is an ideal choice for space-constrained applications.

ICGOOODFIND: The Infineon TLE6710Q is a highly integrated, feature-rich half-bridge driver that exemplifies modern automotive-grade design. Its combination of high output current, extensive diagnostic capabilities via SPI, and robust protective features makes it an exceptional choice for engineers developing reliable and efficient motor control systems for the next generation of vehicles.

Keywords: Automotive Motor Control, Half-Bridge Driver, SPI Interface, High-Current Driver, Diagnostic Features.