A2919SLB

Overview

The A2919SLB is a dual full-bridge PWM motor driver designed to drive bipolar stepper motors or control two DC motors bidirectionally. It features internal pulse width modulation current control with a continuous output current of 750 mA and an output sustaining voltage up to 45 V. The device includes internal clamp diodes, thermal shutdown circuitry, and low output saturation voltage. It supports half-step or quarter-step operation for bipolar stepper motors and operates within a junction temperature range of -20°C to 150°C.

Feature Summary

• Integrates dual full-bridge drivers with internal PWM current control for precise motor regulation
• Includes internal clamp diodes and thermal shutdown protection for enhanced reliability
• Optimized for low output saturation voltage drop to improve efficiency
• Supports half-step and quarter-step resolution modes for bipolar stepper motors

Applications

• Bipolar stepper motor driving in industrial automation systems
• Bidirectional control of two DC motors in general-purpose applications
• Motion control modules requiring integrated power and logic stages

Procurement Notes

Verify the specific suffix (e.g., SLB vs SB) against the manufacturer datasheet to confirm package type and electrical tolerances. Confirm RoHS compliance status and moisture sensitivity level prior to ordering. Check for obsolescence notices as this component may have discontinued variants. Ensure the supplier provides original manufacturer documentation for quality assurance.

Selection Notes

Select this component when a single IC solution is required for driving bipolar stepper motors with integrated current limiting. It is suitable for applications needing bidirectional DC motor control without external discrete components. Consider the 24-SOIC package constraints and thermal management requirements for high-current operations. Verify that the 45V voltage rating meets the system load requirements.

Part Context

The A2919 series belongs to Allegro MicroSystems' portfolio of highly integrated mixed-signal ICs for motion control. These devices combine logic, control, and power stages to reduce system complexity. The A2919 specifically targets applications requiring robust motor driving capabilities with built-in protection features, serving both automotive and industrial markets.

Replacement Considerations

Check for direct pin-compatible substitutes such as the A2919SB or other A2919 family members if availability is an issue. Verify that any replacement maintains the same 750mA current rating and 45V voltage withstand capability. Ensure the alternative supports the required step resolution modes.