ALLEGRO MICROSYSTEMS Microstepping DMOS Motor Driver 2.5A TSSOP28 SMD

The ALLEGRO MICROSYSTEMS Microstepping DMOS Motor Driver is engineered to operate bipolar stepper motors in full, half, quarter, and eighth-step modes. Featuring an integrated translator, this driver simplifies implementation significantly. Simply inputting one pulse on the STEP input drives the motor one step, eliminating the need for complex phase-sequence tables, high-frequency control lines, or intricate interfaces to programme. This makes it an ideal solution for applications where a complex microprocessor is unavailable or over-burdened.

Equipped with a fixed off-time current regulator, the device can operate in slow, fast, or mixed-decay modes. This advanced current-decay control scheme reduces audible motor noise, increases step accuracy, and minimises power dissipation. Furthermore, internal synchronous-rectification control circuitry improves power efficiency during PWM operation.

Robust Protection Features

The driver includes comprehensive internal circuit protection to ensure reliable operation. This encompasses thermal shutdown with hysteresis, under voltage lockout (UVLO), and crossover-current protection. These safeguards protect both the driver and the connected motor from potential damage under fault conditions.

Key Specifications

• Output Rating: ±2.5A, 35V
• Logic Supply Voltage: 3V to 5.5V
• Low RDS(on) Outputs: 0.28Ω source, 0.22Ω sink typical
• Package: TSSOP-28 SMD
• Operating Temperature: -20°C to 85°C

With its blend of easy implementation, efficient power management, and robust protection, this motor driver is a versatile choice for demanding motor control applications.