SMA7022MU

Overview

The SMA7022MU is a two-phase stepper motor unipolar driver IC manufactured by Sanken Electric. It is designed to drive bipolar or unipolar stepper motors using a single power supply voltage. The device integrates sequencer and driver circuits, supporting full-step, half-step, and micro-step excitation modes. Key features include built-in current limiting, thermal shutdown protection, and overcurrent protection. It utilizes a multi-channel output structure to control the motor phases directly.

Feature Summary

• Integrates sequencer and driver for two-phase stepper motors
• Supports full-step, half-step, and micro-step operation
• Includes built-in current limit and thermal protection

Applications

• Office automation equipment
• Industrial control systems
• Automotive applications

Procurement Notes

Verify the specific package variant and temperature grade against the official datasheet before ordering. Confirm that the application circuit matches the required excitation mode and supply voltage range. Ensure proper heat dissipation design is implemented due to the integrated power stage. Check for any recent product change notifications regarding pinout or electrical characteristics.

Selection Notes

Select this component when a compact solution for driving two-phase stepper motors is required. It is suitable for applications needing multiple step modes without external logic. Consider the power supply voltage range and load current requirements. Evaluate the need for thermal management based on the expected duty cycle and ambient temperature conditions.

Part Context

This part belongs to Sanken's family of stepper motor driver ICs. It is often compared with similar devices like the SLA7022MU or SLA7031M which may offer different excitation support or integration levels. The SMA series focuses on providing a complete driving solution in a single package for cost-sensitive applications.