SLA7050M

Overview

The SLA7050M is a unipolar stepper motor translator and PWM driver manufactured by Sanken Electric. It integrates low-power CMOS logic with high-current, high-voltage power FET outputs within a Power Multi-Chip Module (PMCM) package. The device provides complete control for two-phase unipolar stepper motors, featuring internal fixed off-time and pulse-width modulation for output current regulation. Key electrical specifications include a maximum output current of 1 A, an operating temperature range from -20 °C to +85 °C, and a supply voltage requirement between 10 V and 44 V. The component utilizes an 18-pin SIP/ZFM flange mount package.

Feature Summary

• Integrates CMOS sequencing logic with high-current power FET outputs in a single module
• Provides full/half-step control, direction control, and synchronous/asynchronous PWM operation
• Includes internal fixed off-time and dedicated sleep function for power management
• Accepts direct clock input suitable for microprocessor-free or burdened system designs

Applications

• Two-phase unipolar stepper motor drive systems
• Industrial equipment requiring precise motion control
• Automotive auxiliary systems
• Home appliances with integrated motor control

Procurement Notes

Verify the specific suffix variant against the manufacturer's official datasheet to ensure compatibility with required logic levels and packaging. Confirm that the application circuit supports the specified 10 V to 44 V supply range and that thermal management meets the flange mount requirements for the intended operating environment.

Selection Notes

Select this component when a combined logic and power solution is required for unipolar stepper motors. It is suitable for applications where TTL or LSTTL inputs are used with appropriate pull-up resistors. Consider the 1 A output capability and the need for internal PWM current control when designing the motor drive stage.

Part Context

The SLA7050M belongs to Sanken Electric's PMCM product line, designed to simplify stepper motor control by combining translation and driving functions. It replaces discrete logic and driver circuits, reducing board space and design complexity. The family focuses on robust performance in industrial and automotive environments.

FAQ

What type of stepper motor does the SLA7050M support?

It is designed specifically for two-phase unipolar stepper motors.

How is the output current controlled?

The device uses internal fixed off-time pulse-width modulation (PWM) to regulate the output current.

Can the SLA7050M operate without a complex microprocessor?

Yes, it accepts a minimum CLOCK input, making it ideal for applications where a complex microprocessor is unavailable or overburdened.