A3992SLPTR-T

Overview

The A3992SLPTR-T is a DMOS microstepping dual full-bridge PWM motor driver manufactured by Allegro MicroSystems. It features a 24-pin TSSOP package with an exposed thermal pad for surface mount installation. The device supports a logic supply voltage range of 4.5 V to 5.5 V and a load voltage range of 15 V to 50 V. It delivers a continuous output current of ±1.5 A per bridge. The operational temperature range spans from -20°C to 85°C, with a junction temperature limit up to 150°C.

Feature Summary

• Integrates low RDS(on) DMOS output drivers with synchronous rectification to reduce power consumption and eliminate the need for external clamp diodes.
• Features a serial interface that allows programmable control over mixed or fast/slow current decay modes for optimized microstepping performance.
• Includes comprehensive protection mechanisms such as short-circuit protection, thermal shutdown circuitry, and cross-conduction prevention.

Applications

• Microcontroller-based stepper motor drive systems
• General purpose industrial automation equipment
• Motion control applications requiring precise positioning

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific packaging variations. Ensure thermal management design accounts for the exposed pad requirements in the TSSOP package to maintain safe operating temperatures.

Selection Notes

Select this component for applications requiring integrated control and power stages for bipolar stepper motors. Consider the 1.5 A current rating and 50 V load voltage limits against system requirements. Evaluate the serial interface compatibility with the host controller's communication protocol before integration.

Part Context

This part belongs to the A3992 series of microstepping motor drivers. It serves as a surface-mount alternative to the through-hole A3992SB variant. The device consolidates logic control, timing, and power driving into a single chip, simplifying the design of high-performance stepper motor drives.

Replacement Considerations

A3992SB

FAQ

What is the maximum load voltage supported by the A3992SLPTR-T?

The device supports a load voltage range of 15 V to 50 V.

Does the A3992SLPTR-T require external clamp diodes?

No, the internal synchronous rectification feature eliminates the need for most external clamp diodes.