L6219DSTR

Overview

The Allegro MicroSystems L6219DSTR is a bipolar monolithic integrated circuit designed to control and drive both windings of a bipolar stepper motor or bidirectionally control two DC motors. It forms a complete control and drive circuit for LS-TTL or microprocessor-controlled systems with minimal external components. The power stage features a dual full bridge capable of sustaining 46 V, including four diodes for current recirculation. It provides cross-conduction protection and internal thermal shutdown. The device supports half-step, full-step, and microstepping modes with an output current up to 750 mA per winding and peak startup current up to 1 A.

Feature Summary

• Integrates a dual full-bridge power stage with built-in protection diodes for current recirculation
• Features internal pulse-width-modulation (PWM) for precise output current control
• Includes cross-conduction protection to prevent simultaneous switching during direction changes
• Provides internal thermal shutdown circuitry to disable outputs when safe operating limits are exceeded

Applications

• Bipolar stepper motor control systems
• Bidirectional DC motor drive applications
• LS-TTL compatible microprocessor-controlled motor interfaces
• General purpose motor driver circuits requiring high voltage tolerance

Procurement Notes

Verify component authenticity through authorized channels as the part status is discontinued. Confirm package integrity for the 24-SOIC form factor. Check datasheet revisions for any packaging changes. Ensure compatibility with system voltage requirements before integration. Validate thermal performance under expected load conditions.

Selection Notes

Select this component for applications requiring integrated bipolar motor driving with high voltage capability. Consider the 750 mA continuous current rating and 46 V maximum supply voltage. Evaluate the need for internal PWM control and thermal protection features. Assess compatibility with LS-TTL logic levels and microprocessor interfaces.

Part Context

The L6219 series represents a family of bipolar motor driver ICs from Allegro MicroSystems. The L6219DSTR variant specifically denotes the tape-and-reel packaging configuration within the 24-SOIC footprint. This part belongs to the broader category of power management ICs focused on motor control solutions.

Replacement Considerations

E-L6219DSA is listed as a parameter equivalent replacement by STMicroelectronics.