STSPIN820

Overview

The STSPIN820 is a bipolar stepper motor driver integrating control logic and power stages in a 4x4 mm QFN package. It supports an operating voltage range of 7 V to 45 V with a maximum output current of 1.5 A rms. The device features microstepping resolution up to 1/256th of a step, controlled via step-clock and direction interfaces. It includes PWM current control with fixed OFF time and low RDSon power stages totaling 1 Ω typ. Protection mechanisms include overcurrent, short-circuit, undervoltage lockout, and thermal shutdown.

Feature Summary

• Integrates control logic and low RDSon power stage in a compact 4x4 mm QFN package
• Supports microstepping resolution up to 1/256th of a step for smooth motion
• Implements PWM current control with programmable OFF time
• Provides comprehensive protection including non-dissipative overcurrent and thermal shutdown

Applications

• RAMPS compatible FFF 3D printing platforms
• Robotics systems requiring precise motion control
• Mechatronics applications
• Security cameras

Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to ensure correct packaging configuration, such as tape and reel or cut tape. Confirm that the component status remains active before finalizing procurement plans. Ensure compatibility with the intended host controller interface and verify that the supply voltage range aligns with the system design requirements.

Selection Notes

Select this driver for applications requiring high microstepping resolution within a minimal footprint. It is suitable for designs needing a wide input voltage range and integrated protection features. Consider the thermal performance of the QFN package when determining heat dissipation strategies. Verify that the external shunt resistor selection meets the current sensing accuracy requirements for the specific load.

Part Context

The STSPIN820 belongs to the STSPIN8 series of monolithic motor drivers from STMicroelectronics. This family targets industrial and consumer applications by combining advanced control algorithms with robust power stages. The device simplifies design by integrating all necessary functions for driving bipolar stepper motors, reducing the need for external discrete components.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.