Allegro MicroSystems Inc. Motor Drivers, Controllers A3982SLBTR

The A3982SLBTR is a DMOS stepper motor driver designed for bipolar stepper motors, capable of operating in full- and half-step modes. It supports an output drive capacity of up to 35 V and ¬±2 A, making it suitable for various motor control applications. The driver features a built-in translator that simplifies operation by allowing the motor to be driven one step per pulse on the STEP input, eliminating the need for complex programming or phase sequence tables. This product includes a fixed off-time current regulator that can operate in Slow or Mixed decay modes, automatically selecting the appropriate mode based on the current change in the motor phases. This capability helps reduce audible noise, enhances step accuracy, and minimizes power dissipation. Additionally, the A3982SLBTR incorporates internal protection features such as undervoltage lockout (UVLO), thermal shutdown, and crossover-current protection, ensuring reliable operation. The device is housed in a 24-pin wide-body SOIC package with internally fused leads for improved thermal dissipation. It operates within an ambient temperature range of -20 to 85¬8C and has a maximum junction temperature of 150¬8C. This motor driver is a suitable choice for applications where a straightforward interface is required, particularly in systems with limited processing capabilities.