SLA7076MR

Overview

The SLA7076MR is a 2-Phase Unipolar Stepper Motor Driver from Sanken Electric, designed for complete control and drive of stepper motors within a Power Multi-Chip Module (PMCM). It integrates low-power CMOS logic with high-current, high-voltage power FET outputs. The device supports full, half, quarter, eighth, and sixteenth-step operation externally selectable. 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. NMOS outputs can sink up to 2A and withstand 46V in the off state.

Feature Summary

• Integrates CMOS sequencing logic with high-current power FET outputs for direct stepper motor control without complex microprocessor interfaces.
• Supports multiple step resolutions including full, half, quarter, eighth, and sixteenth-step modes via external selection.
• Features internal fixed off-time and pulse-width modulation (PWM) control for precise output current management.
• Includes clamp diodes for protection against inductive transients and eliminates the need for special power-up sequencing.

Applications

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

Procurement Notes

Verify the specific suffix configuration when ordering, as package and thermal characteristics may vary within the SLA707xM series. Confirm that the application environment remains within the specified voltage limits of 44V max for VM and 5.5V max for Vcc. Ensure proper heat dissipation design is implemented given the PMCM packaging type. Cross-reference the exact part number with official Sanken Electric documentation to confirm availability and revision status before finalizing procurement plans.

Selection Notes

Select the SLA7076MR when eight-step or finer resolution control is required for unipolar stepper motors. This model is distinct from variants like the SLA7070M which may only support full and half-step modes. It is suitable for applications where TTL or LSTTL logic levels are used, provided appropriate pull-up resistors are included if necessary. Consider this component for systems needing integrated PWM current control and simplified interface requirements compared to discrete driver solutions.

Part Context

The SLA7076MR belongs to the SLA707xM series of 2-Phase Unipolar Stepper Motor Drivers manufactured by Sanken Electric. This family combines CMOS logic with power FETs in a multi-chip module format. The series is engineered to simplify motor control by embedding sequencing, direction control, and PWM functions, reducing the burden on host microprocessors in office automation and printing devices.

Replacement Considerations

Direct replacements within the same series include SLA7075MR, SLA7077MR, and SLA7078MR, which share similar functional blocks but may differ in step resolution capabilities or pin configurations. Verify compatibility with existing PCB layouts and software drivers when substituting these models.

FAQ

What step modes does the SLA7076MR support?

The SLA7076MR supports full, half, quarter, eighth, and sixteenth-step operation, which are externally selectable.

Does the SLA7076MR require a complex microprocessor interface?

No, it integrates sequencing logic and control internally, making it suitable for applications where a complex microprocessor is unavailable or overburdened.

How is the output current controlled in the SLA7076MR?

Output current is controlled via internal fixed off-time and pulse-width modulation (PWM), determined by the user's selection of a reference voltage and sensing resistor.