A2919SLBTR

Overview

The A2919SLBTR-T is a dual full-bridge PWM motor driver designed for bipolar stepper motors or bidirectional DC motor control. It features a continuous output current of 750 mA and sustains up to 45 V. The device includes internal clamp diodes, PWM current control, low saturation voltage, and thermal shutdown. It supports half-step or quarter-step operation with a parallel interface. Packaged in a 24-SOIC surface-mount format, it operates within a junction temperature range of -20°C to 150°C.

Feature Summary

• Dual full-bridge architecture for driving bipolar stepper windings or two DC motors
• Integrated pulse width modulation (PWM) for precise output current regulation
• Internal protection mechanisms including clamp diodes and thermal shutdown circuitry

Applications

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

Procurement Notes

Verify the complete part number suffix, as 'A2919SLBTR' typically requires '-T' for tape-and-reel packaging. Confirm RoHS3 compliance status and check for obsolescence notices, as distributor records indicate this specific variant may be discontinued. Ensure the ordering code matches the required package style and reel quantity specifications from the manufacturer.

Selection Notes

Select this component when bipolar stepper or bidirectional DC motor control is required with integrated power stages. It is suitable for applications needing up to 750 mA per bridge and 45 V withstand capability. Consider the 24-SOIC package for surface-mount assembly. Verify that the parallel interface and internal PWM control meet the system's timing and regulation requirements without external logic.

Part Context

The A2919 belongs to Allegro MicroSystems' family of dual full-bridge motor drivers. Variants include A2919SB and A2919SLB, differing primarily in package type. The SLB series utilizes a 24-SOIC surface-mount package. This family provides a compact solution for integrating control and power stages, reducing component count in motor drive designs compared to discrete implementations.

Replacement Considerations

Public data indicates the A2919SLBTR-T is listed as discontinued. No direct public substitute part numbers are confirmed in the provided documentation. Evaluate alternative Allegro motor drivers such as the A3916 series for similar functionality if available.