DRV8871-Q1

The DRV8871-Q1 is a high-efficiency, dual H-bridge motor driver IC designed for automotive applications, manufactured by Texas Instruments. It delivers up to 2.5 A continuous current per bridge and supports supply voltages from 4.5 V to 36 V, making it suitable for a wide range of motor control needs in harsh environments such as those found in vehicles. The device integrates two full H-bridges, enabling bidirectional control of brushed DC motors with precise current sensing and protection features. This motor driver includes on-chip current limiting, thermal shutdown, and under-voltage lockout (UVLO) to ensure robust operation under fault conditions. Its integrated current sense amplifier allows accurate current monitoring without requiring external shunt resistors, simplifying system design while improving efficiency. The chip also features adjustable current limit settings via an external resistor, offering flexibility in tuning motor performance based on application requirements. Designed for compliance with automotive standards, the DRV8871-Q1 meets AEC-Q100 Grade 1 qualification, ensuring reliability in temperature ranges from -40°C to +125°C. It supports PWM input signals for speed control and includes a logic-level enable pin for power management, reducing quiescent current during idle states. The low-side drivers operate at a fixed frequency, minimizing electromagnetic interference (EMI), which is critical for sensitive automotive electronics. The DRV8871-Q1 is ideal for use in electric power steering (EPS), electric brake boosters, window lift systems, seat adjusters, and other automotive body and chassis control applications. Its compact 32-pin QFN package enhances thermal performance and reduces PCB footprint, supporting space-constrained designs. Additionally, the device supports diagnostics through a dedicated fault output pin, allowing real-time monitoring of overcurrent, overtemperature, and undervoltage events, which improves system safety and maintainability. With its advanced integration, robust protection mechanisms, and automotive-grade reliability, the DRV8871-Q1 offers a scalable solution for modern vehicle electrification trends. Its combination of high current capability, efficient thermal management, and comprehensive diagnostic features makes it well-suited for demanding automotive environments where durability and precision are essential.