SLA7071MPRT

Overview

The SLA7071MPRT is a two-phase unipolar stepper motor driver from the SLA707xM series by Sanken Electric. It integrates low-power CMOS logic with high-current, high-voltage power FET outputs within a Power Multi-Chip Module (PMCM). The device provides complete control and drive for stepper motors, featuring internal fixed off-time and pulse-width modulation (PWM) current control. It supports full-step and half-step operation modes via external selection. The NMOS outputs can sink up to 1.5 A and withstand 46 V in the off state. Logic supply voltage ranges from 3V to 5.5V, while load supply voltage operates between 10V and 44V.

Feature Summary

• Integrates CMOS sequencing logic, direction control, and PWM current regulation with high-current power FET outputs
• Supports externally selectable full-step and half-step excitation sequences without complex microprocessor interfaces
• Includes internal clamp diodes for protection against inductive transients and a dedicated sleep function

Applications

• Personal Computer Peripherals (PPC)
• Printers
• Office Automation Equipment

Procurement Notes

Verify the specific suffix 'MPRT' indicates tape-and-reel packaging versus bulk or tube variants when sourcing. Confirm RoHS compliance status and moisture sensitivity level (MSL 1) requirements for your assembly process. Ensure the ordering documentation explicitly matches the SLA7071MPRT designation to avoid confusion with similar package types in the SLA707xM family.

Selection Notes

Select this component for applications requiring integrated step/direction control without external sequencers. It is suitable where TTL or LSTTL logic levels are available, potentially requiring pull-up resistors. Choose based on the 1.5 A output capability and 46 V blocking voltage. Verify that the required stepping mode (full/half) aligns with the external pin configuration options provided by this specific model variant.

Part Context

This part belongs to the SLA707xM series of unipolar stepper motor drivers. The series combines CMOS logic with power MOSFETs to simplify motor control designs. The SLA7071MPRT specifically offers 1.5 A output current capability. It is designed to replace discrete driver solutions by integrating sequencing, PWM control, and power stages into a single multi-chip module package.

Replacement Considerations

The SLA7070MPRT, SLA7072MPRT, and SLA7073MPRT are parameter-equivalent alternatives within the same series, differing primarily in maximum output current ratings (1 A, 2 A, and 3 A respectively). Ensure the replacement matches the required current sinking capability and voltage ratings for the specific motor application.