Introducing the L6227D Dual DMOS Full Bridge Driver

The L6227D from STMicroelectronics is a high-performance integrated solution designed to drive both windings of a bipolar stepper motor or bidirectionally control two DC motors. Built using ST's advanced DMOS technology, this dual full-bridge driver combines low RDS(on) transistors with protection features to ensure high efficiency and reliability in a variety of applications.

Key Features

• Operating Voltage Range: The L6227D operates over a wide supply voltage range from 8 V to 52 V, making it suitable for a diverse set of applications.
• Output Current Capacity: It can deliver up to 1 A per channel, with peak currents up to 3 A (non repetitive), providing the necessary power for a wide range of motor requirements.
• Cross-Conduction Protection: The device includes cross-conduction protection, which prevents simultaneous high-side and low-side ON states that could lead to short circuits.
• Thermal Shutdown and Under-Voltage Lockout: Built-in thermal shutdown and under-voltage lockout features protect the device from overheating and operating under insufficient power conditions.
• Non-Dissipative Overcurrent Protection: An innovative non-dissipative overcurrent detection and protection is implemented to safeguard the device and the motor from excessive current conditions.

Applications

The versatility of the L6227D makes it an ideal choice for a range of applications, including:

• Factory automation and robotics
• Office automation
• Consumer electronics
• Medical equipment

Design Flexibility

STMicroelectronics has designed the L6227D with the needs of designers in mind. The device supports a parallel interface for direct control with a microcontroller, and its full-bridge architecture allows for various driving modes, including slow/fast decay modes, which provides designers with the flexibility to tailor the driver to their specific application.

Conclusion

The L6227D Dual DMOS Full Bridge Driver is a testament to STMicroelectronics' commitment to providing high-quality, integrated solutions for motor control. Its robust feature set, combined with the ability to drive a wide range of motors, ensures that it can meet the needs of the most demanding applications while simplifying the design process for engineers.