A4970SLBTR-T

Overview

The A4970SLBTR-T is a fully integrated bipolar stepper motor driver IC manufactured by Allegro MicroSystems. It combines control logic, current regulation, and power DMOS output stages in a single package. The device supports supply voltages from 4.75V to 5.25V and drives loads between 7.45V and 45V. It features a 24-SOIC surface-mount package with four half-bridge outputs. The component operates within a junction temperature range of -20°C to 150°C and utilizes an on/off interface for control signals.

Feature Summary

• Integrates full control logic and power DMOS output stages into a single chip
• Provides constant-current chopper regulation for precise torque control
• Supports multiple step resolutions including full, half, quarter, eighth, and sixteenth steps

Applications

• Office automation equipment such as printers and scanners
• Automated vending machines
• Security systems and access control mechanisms
• Industrial process control actuators

Procurement Notes

Verify the specific suffix 'SLBTR-T' against official Allegro documentation to confirm the tape-and-reel packaging configuration and lead frame material specifications. Ensure that the 24-SOIC footprint matches the target PCB design requirements. Confirm RoHS3 compliance status through the manufacturer's latest environmental declaration before finalizing procurement orders.

Selection Notes

Select this component when a compact solution for bipolar stepper motors is required without external discrete drivers. The integrated thermal shutdown and overcurrent protection simplify system design. Consider the 24-pin SOIC package constraints for high-density layouts. Evaluate the 45V load voltage limit against the specific motor coil requirements to ensure safe operation margins.

Part Context

This part belongs to the A4970 family of stepper motor drivers designed for general-purpose applications. It serves as a complete drive solution replacing complex discrete transistor circuits. The series is characterized by its ability to handle moderate current loads while maintaining low standby power consumption. It is distinct from brushless DC or universal motor drivers in its internal commutation logic.

Replacement Considerations

• A4970GLBTR-T

FAQ

What is the maximum load voltage supported by the A4970SLBTR-T?

The device supports a load voltage range from 7.45V up to 45V.

Does the A4970SLBTR-T support microstepping?

Yes, it supports full, half, quarter, eighth, and sixteenth step resolutions.