A3949SLB

Overview

The A3949SLB is a DMOS full-bridge motor driver manufactured by Allegro MicroSystems. It operates on a single supply voltage ranging from 8V to 36V and delivers an output current of 2.8A. The device utilizes a 16-pin PowerSOIC package with dimensions of 7.50mm width. It supports a junction temperature range of -20°C to 150°C. Key electrical specifications include a maximum collector-emitter voltage of 36V and low RDS(ON) outputs for efficient power management.

Feature Summary

• Integrates control logic and power stage in a single chip
• Includes thermal shutdown protection circuitry
• Features internal under-voltage lockout (UVLO)
• Provides crossover current protection

Applications

• Brushed DC motor control systems
• General purpose motor driving applications
• Industrial automation equipment

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as records indicate non-compliance. Check for obsolescence notices, as the part may be discontinued. Ensure the specific package variant matches design requirements before procurement.

Selection Notes

Select this component for applications requiring integrated brushed DC motor control within a compact PowerSOIC footprint. Evaluate thermal performance given the high junction temperature rating. Compare against successor models like the A3950 if parameter equivalence is required for updated designs.

Part Context

This component belongs to the Allegro A3949 series of DMOS full-bridge motor drivers. It is designed for single-supply operation and integrates necessary protection features. The series targets cost-sensitive brushed DC motor applications requiring reliable performance in industrial environments.

Replacement Considerations

The A3950SLPTR-T is documented as a parameter-equivalent replacement. Verify pin compatibility and electrical specifications when substituting.