ATD5984 QFN-24-EP(4×4) Stepper Motor Driver SMD IC

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ATD5984 QFN-24-EP(4×4) Stepper Motor Driver SMD IC The ATD5984 is a micro stepping motor driver IC with an integrated decoder, designed for driving bipolar stepper motors. The chip supports various stepping modes, including full-step, half-step, and fractional steps down to 1/32, providing precise motor control with minimal input signals. The device is tailored for easy integration into applications requiring stepper motors but without complex programming interfaces, making it suitable for scenarios where a microprocessor’s burden must be minimized. The ATD5984 operates with dual H-bridge output drivers that allow for precise current regulation in the motor windings. It features a Pulse Width Modulation (PWM) current control mechanism, which ensures smooth motor operation by dynamically adjusting current levels. The device also includes features such as automatic detection and selection of current decay modes, including slow and mixed decay, optimizing efficiency and reducing audible noise. This flexibility is especially important in applications requiring fine control over the motor’s performance, such as in printers or small automation systems. To enhance the device’s reliability, the ATD5984 includes multiple protection features, such as under-voltage lockout, overcurrent protection, and thermal shutdown. These protections ensure the system operates safely, preventing damage in case of faults. Furthermore, it incorporates synchronous rectification to reduce power consumption, providing efficient operation while minimizing heat generation, making it suitable for space-constrained or low-power applications. Features: Integrated decoder for easy stepper motor control. Supports full, half, 1/4, 1/8, 1/16, and 1/32 microstepping. Auto-selection of current decay modes: slow and mixed decay. PWM current control with fast and slow decay for accurate stepper motion. Synchronous rectification for improved power efficiency. Overcurrent protection, under-voltage lockout, and thermal shutdown for enhanced safety. Low current sleep mode (<10μA) for power-saving applications. Available in QFN-24 package with exposed thermal pad for better heat dissipation. Specifications: Parameter Value Input Voltage (VBB): 5.5V to 28V Output Current (IOUT): ±1.6A Output On Resistance (RDS(ON)): 400-500 mΩ Body Diode Forward Voltage (VF): 1.3V Logic Input Voltage (VIN): 0.8V (low) to 2.8V (high) Logic Input Current (IIN): -20 μA to 20 μA Operating Temperature (TA): -40°C to 85°C Maximum Junction Temperature (TJmax): 150°C Sleep Mode Current: 10 μA Under-voltage Lockout (VUVLO): 3.0V to 3.15V Overcurrent Protection Threshold: 2.3A Pinout Diagram: Footprint Diagram: Applications: Stepper Motor Drives for Industrial Equipment. Robotics and Automation. Printers and 3D Printers. Consumer Electronics. Small CNC Machines. Battery-powered Applications. Package Contents: 1x ATD5984 QFN-24-EP(4×4) Stepper Motor Driver SMD IC Datasheet