L6472H

Overview

The L6472H is a fully integrated microstepping motor driver with an embedded motion engine and SPI interface, designed for driving two-phase bipolar stepper motors. It features a dual low RDS(on) DMOS full bridge with accurate on-chip current sensing for non-dissipative control. The device supports up to 1/16 microstepping via adaptive decay mode and allows programmable speed profiles through dedicated registers. Operating voltage ranges from 8 V to 45 V, delivering a peak output current of 7.0 A (3.0 A r.m.s.). It includes comprehensive protections such as thermal shutdown, overcurrent detection, and low bus voltage monitoring.

Feature Summary

• Integrates a digital control core for generating user-defined motion profiles including acceleration, deceleration, and target position.
• Features patented advanced current control with predictive current sensing and adaptive decay for high-resolution microstepping.
• Provides robust protection mechanisms including two levels of overtemperature protection and programmable non-dissipative overcurrent protection.

Applications

• Driving two-phase bipolar stepper motors in industrial automation systems
• Motion control applications requiring precise positioning and speed profiling
• Development and testing of stepper motor drivers using evaluation boards

Procurement Notes

Verify the specific suffix (e.g., H, PD, TR) to confirm package type and reel specifications. Confirm RoHS compliance status and humidity sensitivity handling requirements before storage. Ensure the ordering part number matches the exact pinout and thermal characteristics required for the target PCB design.

Selection Notes

Select this component for applications requiring high integration of power stages and motion logic in a single package. It is suitable for designs needing SPI-based control without external microcontrollers for basic motion tasks. Consider the PowerSO-36 or SO-36 packages based on thermal management needs and board space constraints.

Part Context

The L6472 belongs to STMicroelectronics' SPIN family of stepper motor drivers, which integrate motion engines to simplify system architecture. This series targets applications demanding high efficiency and reliability, leveraging analog mixed-signal technology for precise current control and robust fault protection in demanding environments.

Replacement Considerations

L6470: Similar functionality but with lower current capability. L6472PD: Same electrical performance in a PowerSO-36 package. L6472TR: Tape and reel packaging variant. Verify pin compatibility and thermal dissipation requirements when substituting.