A3968SA

Overview

The A3968SA is a dual full-bridge PWM motor driver manufactured by Allegro MicroSystems, 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 (PWM), current-control circuitry for motor winding current regulation. Key electrical parameters include a supply voltage range of 4.75V to 5.5V and a load voltage range of 4.75V to 30V. It operates within a junction temperature range of -20°C to 150°C and utilizes a 16-DIP package with through-hole mounting.

Feature Summary

• Integrates two H-bridges for bidirectional control of two DC motors
• Includes internal fixed-frequency PWM current-control circuitry
• Features internal thermal-shutdown, crossover-current protection, and UVLO protection
• Contains internal ground-clamp and flyback diodes

Applications

• Bidirectional DC motor control systems
• General-purpose motor driver applications requiring integrated control and power stages

Procurement Notes

Verify component authenticity and datasheet revision status due to discontinued product status. Confirm RoHS compliance requirements as the part does not meet RoHS specifications. Validate pinout compatibility with existing PCB layouts before integration. Check for available replacement alternatives from the manufacturer if long-term supply stability is required.

Selection Notes

Select this component for applications requiring dual bipolar motor control with integrated PWM functionality. Ensure the design accommodates the 16-DIP package constraints and through-hole mounting requirements. Verify that the system voltage and current demands align with the specified ±650 mA continuous output and 30 V rating limits.

Part Context

The A3968SA belongs to the A3968 family of dual full-bridge PWM motor drivers. It is functionally identical to the A3968SLB except for package style and pinout. Both devices are designed for similar bidirectional DC motor control applications but differ in physical form factor and connection interface.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.