A3966SLB

Overview

The A3966SLB is a dual full-bridge PWM motor driver designed to drive two-phase bipolar stepper motors. It integrates control logic and power stages, featuring continuous output currents of ±650 mA and operating voltages up to 30 V. The device utilizes internal fixed-frequency pulse-width modulated current-control circuitry for winding current regulation. Key protection features include thermal shutdown, crossover-current protection, and UVLO. It operates within a junction temperature range of -20°C to 150°C and is housed in a 16-SOIC package.

Feature Summary

• Integrates dual full-bridges with internal fixed-frequency PWM current control
• Includes comprehensive protection mechanisms such as thermal shutdown and UVLO
• Supports user-selectable blanking windows and Satlington sink drivers

Applications

• Two-phase bipolar stepper motor drives
• General purpose motion control systems
• Industrial automation actuators

Procurement Notes

Verify component authenticity through authorized Allegro MicroSystems distributors or certified partners. Confirm the specific suffix matches the required package variant. Check RoHS compliance status as older batches may differ from current specifications. Ensure storage conditions adhere to moisture sensitivity level requirements before soldering.

Selection Notes

Select this component for applications requiring integrated bipolar stepper motor control without external logic. Consider the ±650 mA current limit and 30 V voltage rating against load requirements. Evaluate thermal management needs given the SOIC package and power dissipation characteristics. Verify compatibility with system supply voltages ranging from 4.75 V to 5.5 V.

Part Context

The A3966SLB belongs to the A3966 series of dual full-bridge motor drivers manufactured by Allegro MicroSystems. This series is engineered for compact, high-performance stepper motor applications. The SLB suffix denotes the surface-mount SOIC package configuration. It serves as a complete solution for driving bipolar stepper motors with minimal external components.

Replacement Considerations

L293D (STMicroelectronics) and TB6562AFG,8,EL (Toshiba Semiconductor and Storage) are listed as similar alternatives.