A3968SLB-T

Overview

The A3968SLB-T is a dual full-bridge PWM motor driver designed for bidirectional control of two DC motors. It features two H-bridges capable of continuous output currents of ±650 mA and operating voltages up to 30 V. The device integrates internal fixed-frequency, pulse-width modulated current-control circuitry for motor winding current regulation. Key electrical specifications include a supply voltage range of 4.75 V to 5.5 V and an output load voltage range of 4.75 V to 30 V. It operates within a temperature range of -20°C to +150°C (TJ) and is housed in a 16-SOIC package.

Feature Summary

• Integrates dual H-bridges with internal fixed-frequency PWM current control for precise motor winding regulation
• Includes Satlington sink drivers with internal ground-clamp and flyback diodes for robust switching
• Provides comprehensive protection via internal thermal-shutdown, crossover-current protection, and UVLO

Applications

• Bidirectional DC motor control systems
• Printers and scanners requiring dual motor actuation
• Industrial automation equipment with low-power motor drives
• Appliance control modules utilizing PWM speed regulation

Procurement Notes

Verify the specific suffix configuration against the manufacturer's official datasheet to ensure compatibility with required packaging and pinout standards. Confirm that the selected variant meets all environmental and regulatory compliance requirements for the intended deployment environment before finalizing procurement decisions.

Selection Notes

Select this component when designing circuits requiring independent control of two brushed DC motors with integrated current limiting. Ensure the application voltage does not exceed the 30 V rating and that thermal management strategies accommodate the specified junction temperature limits. Verify interface compatibility with the host controller's parallel or PWM signaling requirements.

Part Context

The A3968 belongs to Allegro MicroSystems' family of dual full-bridge motor drivers. It is functionally identical to the A3968SA except for package style and pinout. This series is engineered for applications needing compact, high-performance motor control solutions with built-in safety features and simplified external component requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official obsolescence notices or cross-reference guides for verified alternatives if this component is discontinued.