A3953SLB-T

Overview

The A3953SLB-T is a full-bridge PWM motor driver manufactured by Allegro MicroSystems. It features a 16-SOIC surface-mount package with an output current rating of 1.3A and a maximum voltage rating of 50V. The device operates on a logic supply voltage between 3V and 5.5V. It supports both bipolar stepper motors and brushed DC motors. Key electrical parameters include a continuous output current of ±1.3A, internal transient suppression diodes, and thermal shutdown circuitry. The component is designed for general-purpose applications with integrated control and power stages.

Feature Summary

• Integrates full-bridge PWM motor driver functionality with saturated sink drivers for efficient operation below 1A.
• Includes internal protection mechanisms such as thermal shutdown, crossover-current protection, and UVLO.
• Supports fast and slow current-decay modes for precise motor control.
• Features a sleep mode for low current consumption.

Applications

• Bipolar stepper motor control
• Brushed DC motor drive
• General-purpose motor automation

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the manufacturer is Allegro MicroSystems to ensure authenticity. Check for RoHS compliance status as specifications may vary by production batch. Ensure the 16-SOIC package dimensions match your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring a fully integrated motor driver with up to 1.3A output current. It is suitable for designs needing 50V voltage tolerance and 3V to 5.5V logic compatibility. Consider the 16-SOIC package size for space-constrained layouts. Verify that the required motor type aligns with its support for bipolar stepper or brushed DC configurations.

Part Context

The A3953SLB-T belongs to the A3953 series of full-bridge PWM motor drivers from Allegro MicroSystems. This series is designed to provide complete motor control solutions in a compact package. The part integrates both logic and power stages, reducing external component count. It is part of Allegro's portfolio for motor control and interface ICs.

FAQ

What types of motors does the A3953SLB-T support?

It supports bipolar stepper motors and brushed DC motors.

Does the A3953SLB-T have built-in protection features?

Yes, it includes internal thermal shutdown, crossover-current protection, and UVLO.