L6470PDTR

Overview

The L6470PDTR is a fully integrated microstepping motor driver with a digital motion engine and SPI interface, designed for two-phase bipolar stepper motors. It operates within an 8V to 45V supply range and delivers up to 3A RMS phase current with a 7.0A peak capability. The device features a dual low RDS(on) DMOS full bridge with accurate on-chip current sensing for non-dissipative control. It supports resolutions from 1 to 1/128 steps and includes programmable acceleration, deceleration, speed, and positioning profiles via SPI registers.

Feature Summary

• Integrates a digital motion engine capable of generating user-defined motion profiles including acceleration, deceleration, speed, and target position without external MCU intervention.
• Features sensorless stall detection and a comprehensive protection suite including thermal shutdown, low bus voltage detection, and programmable non-dissipative overcurrent protection.
• Supports up to 1/128 microstepping resolution for smooth operation and includes programmable power MOS slew rate control to minimize electromagnetic interference.

Applications

• Bipolar stepper motor control in industrial automation systems
• Positioning mechanisms in smart home appliances and IoT devices
• Multi-motor applications utilizing daisy-chain SPI configuration

Procurement Notes

Verify the specific suffix PDTR corresponds to the PowerSO-36 Slug Up package and tape-and-reel packaging format. Confirm that the component meets RoHS3 compliance standards as indicated by manufacturer documentation. Ensure compatibility with the required SPI communication protocol and voltage levels before integration into the final design.

Selection Notes

Select this component when a fully integrated solution combining power stage and motion control logic is required. It is suitable for designs needing high-resolution microstepping and advanced protection features without complex external circuitry. Consider the PowerSO-36 package for thermal performance in space-constrained applications requiring up to 3A RMS current handling.

Part Context

This part belongs to the STSPIN L64 series of motor drivers. It is distinct from variants like the L6470H which may differ in package or pinout. The L6470 family is characterized by its dSPIN technology, enabling simplified system architecture by integrating the motion controller directly with the power driver stage.

Replacement Considerations

Direct substitutes include other L6470 variants such as L6470H, provided the package and pinout compatibility are verified. Cross-model selection should account for differences in thermal characteristics and physical footprint between PowerSO-36 and other available packages within the same product line.

FAQ

Does the L6470PDTR support daisy-chain configuration?

Yes, the device supports a daisy-chain SPI configuration, allowing multiple units to be controlled sequentially using a single SPI master interface.

What type of current protection is included?

The device includes programmable non-dissipative overcurrent protection on both high-side and low-side switches, along with two-level overtemperature protection.