STMicroelectronics L297D Stepper Motor Controller

The L297D from STMicroelectronics is a comprehensive stepper motor controller designed to drive both windings of a bipolar stepper motor or bidirectionally control two DC motors. Integrating all the functions needed for a stepper motor control, including a dual H-bridge driver, the L297D is an ideal choice for applications where precise control of motor rotation is essential.

Key Features

• Integrated Dual Full Bridge: The L297D contains two L293E monolithic circuits, which are capable of driving two full H-bridges, making it perfect for controlling a bipolar stepper motor.
• Chopper Drive Capability: This controller supports chopper-mode driving, which enables higher motor speeds and improved torque performance by controlling the current in the windings.
• Wide Voltage Range: The device operates over a wide range of supply voltages from 4.5V to 7V, making it versatile for various application requirements.
• Phase Sequencer: It includes a built-in phase sequencer, which simplifies the control logic and reduces the number of required control lines.
• Programmable Load Current: The L297D allows the user to program the peak load current through external resistors.
• Thermal Shutdown: Enhanced safety features include thermal shutdown and internal UVLO (Under Voltage Lock Out), protecting the device and the motor from over-temperature and low-voltage conditions.
• Cross-Conduction Protection: The device also includes non-dissipative overcurrent protection, which prevents cross-conduction and ensures the reliability of the motor operation.

Applications

The L297D stepper motor controller is suitable for a wide range of applications, including but not limited to:

• CNC machines
• 3D printers
• Robotics
• Automated equipment and precision control systems

With its robust feature set and the ability to drive complex motor operations, the L297D is an excellent component for designers looking to incorporate reliable and efficient stepper motor control into their projects.