L6470H

Overview

The L6470H is a fully integrated microstepping motor driver designed for driving two-phase bipolar stepper motors. It operates within an 8 V to 45 V supply range and delivers up to 3 A RMS phase current with a 7 A peak output capability. The device integrates a dual low RDS(on) DMOS full bridge, accurate on-chip current sensing, and a digital motion engine supporting resolutions up to 1/128 steps. Communication is managed via a standard SPI interface.

Feature Summary

• Integrates a digital motion engine capable of generating user-defined acceleration, deceleration, speed, and target position profiles without external processing.
• Features sensorless stall detection and locked rotor protection mechanisms to ensure operational safety.
• Includes comprehensive protection circuits covering thermal shutdown, under-voltage lockout, and programmable non-dissipative overcurrent protection.

Applications

• Two-phase bipolar stepper motor control systems
• Multi-motor applications utilizing daisy-chain configuration
• Motion control evaluation platforms

Procurement Notes

Verify the specific package variant, as the L6470 family includes distinct suffixes such as PD (PowerSO-36) and HTR (HTSSOP). Confirm that the procurement order matches the required thermal performance and pinout specifications for the intended PCB layout. Ensure compatibility with the chosen communication interface standards.

Selection Notes

Select this component when a complete solution combining power stage and motion control logic is required. It is suitable for designs needing high-resolution microstepping and precise positioning capabilities. Consider the operating temperature range and current requirements relative to the load characteristics.

Part Context

The L6470H belongs to the STSPIN L64 series of motor drivers. It is often evaluated using dedicated hardware tools such as the EVAL6470H board or the STEVAL-IKM001V1 kit. These tools facilitate the testing of voltage mode driving and parameter regulation for specific application needs.

Replacement Considerations

The L6470PD is a verified substitute part number within the same product family. Both devices share core functional specifications but differ in physical packaging and thermal dissipation characteristics.