The A3988TE-T is a complete microstepping motor driver with built-in translator for easy operation. It is designed to drive bipolar stepper motors in full-, half-, quarter-, and eighth-step modes. The output drive capability of up to 35 V and ±2 A makes it suitable for a wide range of stepper motor applications.

Applications

• Printers
• Scanners
• Textile machinery
• Office automation equipment
• Video surveillance
• Point of Sale (POS) systems

Features

• Low RDS(on) outputs
• Automatic current decay mode detection/selection
• Mixed and slow current decay modes
• Synchronous rectification for low power dissipation
• Internal UVLO and thermal shutdown circuitry
• Crossover-current protection
• Short-to-ground and shorted-load protection

Benefits

• Smooth motor control: Microstepping capability enables precise and smooth motor control, reducing vibration and noise.
• Simplified design: Built-in translator simplifies the control interface, reducing the need for external components.
• High efficiency: Synchronous rectification minimizes power dissipation, improving energy efficiency.
• Robust protection: Built-in protection features safeguard the driver and motor from damage due to overvoltage, undervoltage, overcurrent, and thermal overload.
• Wide operating voltage range: Operates from 8 V to 35 V.

Additional Details

The A3988TE-T utilizes a fixed off-time current regulation scheme that incorporates Allegro’s patented mixed decay mode. The device operates in full-, half-, quarter-, and eighth-step modes, which are selectable via logic inputs. The translator simplifies implementation with step and direction inputs. Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation. Protection features include thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection.

The A3988TE-T is supplied in a small, thermally enhanced TSSOP package. The exposed pad enhances thermal dissipation, allowing the device to deliver full output current even in demanding environments. It is designed for a wide range of stepper motor applications where precise control and high efficiency are required.