SLA7070MPR

Overview

The SLA7070MPR 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 in a Power Multi-Chip Module (PMCM). The device provides complete control and drive for unipolar stepper motors, featuring internal fixed off-time and pulse-width modulation (PWM) current control. It supports full-step and half-step operation modes. Key electrical specifications include a maximum motor supply voltage (VM) of 44V, a load supply voltage (Vs) range of 10V to 44V, and a logic supply voltage (Vcc) of 3V to 5.5V. The NMOS outputs are capable of sinking up to 1A.

Feature Summary

• Integrates CMOS sequencing logic with high-current power MOSFET outputs for complete motor control
• Features internal fixed off-time and PWM control for output current regulation
• Supports external selection of full-step and half-step excitation modes
• Includes clamp diodes for protection against inductive transients

Applications

• Personal Printer Copiers (PPC)
• Printers
• Office Automation (OA) Equipment

Procurement Notes

Verify the specific suffix 'MPR' against the manufacturer's official datasheet to confirm package type and tape-and-reel configuration. Ensure the design accommodates the 23-pin ESIP or ZIP form factor. Confirm logic level compatibility with the target microcontroller interface, as TTL inputs may require pull-up resistors for proper high-state definition.

Selection Notes

Select this component when driving two-phase unipolar stepper motors requiring integrated control and power stages. It is suitable for applications where complex microprocessor sequencing is undesirable. Verify that the required output current does not exceed the 1A limit per channel. Consider thermal management requirements given the PMCM packaging and operating temperature range.

Part Context

The SLA7070MPR belongs to the SLA707xM series, which includes variants like SLA7076MPR with higher current capabilities. These drivers are designed to simplify stepper motor interfaces by eliminating the need for phase-sequence tables or high-frequency control lines. The series is characterized by its ability to operate without special power-up sequencing.

Replacement Considerations

SLA7070MR is a parameter-equivalent alternative within the same series. Other series members such as SLA7076M offer similar functionality but with different current ratings. Verify pinout and electrical specifications before substitution.