SLA7073MPRT

Overview

The SLA7073MPRT is a two-phase unipolar stepper motor driver from Sanken Electric, integrating CMOS logic and power MOSFET outputs in a 23-ZIP package. It provides complete control for stepper motors with internal fixed off-time and PWM current regulation. The device supports full, half, quarter, eighth, and sixteenth-step resolution via external selection. Key electrical parameters include a motor supply voltage (VM) up to 44V, load supply voltage (Vs) of 10V to 44V, and logic supply voltage (Vcc) of 3V to 5.5V. Output currents are rated at 1.5A, with NMOS outputs capable of withstanding 46V in the off state.

Feature Summary

• Integrates low-power CMOS sequencing logic with high-current, high-voltage power FET outputs for complete drive and control.
• Features internal fixed off-time and pulse-width modulation (PWM) control for precise output current management.
• Supports selectable step resolutions including full, half, quarter, eighth, and sixteenth steps without complex programming.
• Includes clamp diodes for protection against inductive transients and eliminates the need for special power-up sequencing.

Applications

• Personal Printer Components (PPC)
• Office Automation Equipment
• General-purpose unipolar stepper motor control systems

Procurement Notes

Verify that the specific suffix 'R' indicates the tape-and-reel packaging variant rather than the tube configuration. Confirm compatibility with the target PCB footprint for the 23-ZIP(SLA) form factor. Ensure input logic levels align with the TTL or LSTTL requirements, utilizing pull-up resistors if necessary to guarantee proper logic high states during operation.

Selection Notes

Select this component when a fully integrated solution for unipolar stepper motors is required, eliminating the need for separate sequencers and drivers. It is suitable for applications where microprocessor resources are limited, as it handles sequencing internally. Consider the 1.5A output capability and 44V voltage rating to ensure they match the motor's electrical specifications and thermal environment constraints.

Part Context

This part belongs to the SLA707xM series, which combines CMOS logic with power FETs in a Power Multi-Chip Module (PMCM). The series is designed to simplify stepper motor interface design by removing the need for phase-sequence tables or high-frequency control lines. It serves as a direct replacement for discrete driver solutions in compact electronic devices.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include SLA7073MR and SLA7073MPR from Sanken Electric USA Inc. Verify that the alternative package type (tube vs. reel) meets assembly requirements before substitution.