A3948SLB

Overview

The A3948SLB is a discontinued DMOS full-bridge PWM motor driver designed for brushed DC motor control. It features a serial interface for programmable parameters including blank time and decay mode. The device supports a load supply voltage range of 20V to 50V and a logic supply voltage of 4.5V to 5.5V. It provides an output current capability of 1.5A with integrated thermal shutdown and undervoltage lockout protection. The component is housed in a 24-pin PowerDIP package.

Feature Summary

• Integrates a full-bridge output structure built with DMOS technology for efficient power switching.
• Features a serial interface allowing user programming of PWM parameters such as blank time and decay mode.
• Includes internal charge pump circuitry requiring external capacitor optimization for high-side gate drive generation.

Applications

• Industrial automation systems
• Robotics applications

Procurement Notes

Verify the discontinuation status of the A3948SLB before design finalization, as manufacturer records indicate this part is no longer in active production. Confirm that alternative packages or updated series components meet the required electrical specifications and pin compatibility for existing designs.

Selection Notes

Select this component only if legacy support for the 24-pin PowerDIP package is strictly required. Ensure the application does not demand RoHS compliance, as the datasheet indicates non-compliance. Evaluate replacement options from newer Allegro series if new manufacturing runs are necessary.

Part Context

This part belongs to the A3948 family of motor drivers, which utilizes DMOS technology for high-current brushed DC motor control. The SLB suffix specifically denotes the 24-pin PowerDIP surface mount variant. This family is characterized by its serial programmability and robust protection features for industrial environments.

Replacement Considerations

• A3948SLBTR-T