L6470PD

Overview

The L6470PD is a fully integrated microstepping motor driver and motion controller designed for two-phase bipolar stepper motors. It features a digital control core with dSPIN technology, enabling programmable motion profiles including acceleration, deceleration, speed, and target position via SPI. The device integrates dual low RDS(on) DMOS full bridges capable of delivering up to 7.0 A peak current (3.0 A RMS). It supports voltage inputs from 8 V to 45 V and offers resolution up to 1/128 microsteps. Key protections include thermal shutdown, overcurrent detection, and sensorless stall detection.

Feature Summary

• Integrates a digital motion engine that generates user-defined motion profiles without external microcontroller intervention for basic movements.
• Features a high-speed SPI interface for communication with host controllers, allowing access to all configuration registers and status data.
• Includes built-in non-dissipative current sensing and protection circuits for precise current control and fault management.

Applications

• Two-phase bipolar stepper motor control in industrial automation systems
• Positioning mechanisms requiring programmable acceleration and deceleration ramps
• Applications utilizing sensorless stall detection for load monitoring

Procurement Notes

Verify the specific suffix 'PD' corresponds to the PowerSO-36 package variant when sourcing. Confirm compatibility with the required operating voltage range and thermal management requirements for the intended application environment. Ensure the SPI interface levels match the host controller logic voltages.

Selection Notes

Select this component when a single-chip solution combining power driving and motion control is required. It is suitable for designs needing high microstepping resolution and programmable kinematic profiles. Consider the thermal performance of the PowerSO-36 package relative to the expected RMS current and ambient temperature conditions.

Part Context

The L6470 belongs to the STSPIN L64 family of intelligent motor drivers. This series emphasizes integration by combining analog power stages with digital control logic. The L6470 specifically targets applications demanding advanced motion control features such as soft start/stop and precise positioning within a compact footprint.

Replacement Considerations

Check for other variants within the L6470 family, such as L6470H, which may offer different packaging or minor electrical characteristic variations. Verify pinout and register compatibility before substituting to ensure seamless integration into existing hardware and firmware designs.