A2919SLB-T

Overview

The A2919SLB-T is a dual full-bridge PWM motor driver manufactured by Allegro MicroSystems, housed in a 24-SOIC surface-mount package. It provides 750 mA continuous output current and sustains up to 45 V output voltage. Designed for bipolar stepper motors or bidirectional DC motor control, it features internal PWM current regulation, low saturation voltage drop, and integrated thermal shutdown. The device operates with a supply voltage of 4.75 V to 5.25 V and supports half-step or quarter-step resolution.

Feature Summary

• Integrates dual full-bridge drivers with internal pulse width modulation current control
• Supports half-step and quarter-step operation for bipolar stepper motors
• Includes internal clamp diodes and thermal shutdown circuitry for protection

Applications

• Bipolar stepper motor drive systems
• Bidirectional DC motor control applications
• General-purpose motor driver circuits

Procurement Notes

Verify the exact suffix against official Allegro documentation, as variations like SLBTR-T indicate tape-and-reel packaging while SLB-T typically denotes bulk. Confirm component status, as listings may indicate end-of-life or discontinuation. Ensure compatibility with required operating temperatures and interface standards before finalizing procurement decisions.

Selection Notes

Select this component when driving bipolar stepper motors requiring precise current control via internal PWM. It is suitable for applications needing high voltage tolerance up to 45 V and continuous currents around 750 mA. Consider the 24-SOIC package constraints and thermal management requirements due to the integrated power stage design.

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 simplify system design. The A2919 specifically targets general-purpose motor applications, offering a compact solution for industrial and consumer electronics requiring reliable motor actuation.

Replacement Considerations

Officially documented similar parts include A2919SB, A2919SLB, and A2919SLBTR-T. Verify pinout compatibility and electrical specifications before substitution.