SLA7076MPRT

Overview

The SLA7076MPRT is a two-phase unipolar stepper motor driver integrated circuit manufactured by Sanken Electric. It combines low-power CMOS logic with high-current, high-voltage power FET outputs to provide complete control and drive for stepper motors. The device features internal fixed off-time and pulse-width modulation (PWM) control of output current. It supports full, half, quarter, eighth, and sixteenth-step operation externally selectable. Key electrical parameters include a motor supply voltage up to 44V, load supply voltage from 10V to 44V, and logic supply voltage from 3V to 5.5V. The output configuration consists of four low-side drivers capable of sinking up to 1.5A per channel.

Feature Summary

• Integrates sequencing logic, direction control, and synchronous/asynchronous PWM operation within a single package.
• Features NMOS outputs capable of sinking high currents while withstanding high off-state voltages.
• Includes clamp diodes to protect against inductive transients generated by the motor coils.
• Eliminates the need for complex microprocessor interfaces or phase-sequence tables.

Applications

• Personal Printer Copier (PPC) systems
• Office Automation (OA) equipment
• Printers

Procurement Notes

Verify the specific suffix 'T' indicates tube packaging when ordering. Confirm that the 23-ZIP(SLA) form leads package matches the target PCB footprint. Ensure the design accommodates the thermal requirements for through-hole mounting. Check RoHS compliance status if required by local regulations. Validate that the 3V-5.5V logic supply range aligns with the system's control voltage.

Selection Notes

Select this component when driving two-phase unipolar stepper motors requiring external step resolution selection. It is suitable for applications where a complex microprocessor is unavailable or overburdened. Consider the 1.5A output capability and 44V voltage rating for appropriate motor loads. The parallel interface simplifies connection compared to serial alternatives. Verify that the operating temperature range of -20°C to 150°C meets environmental constraints.

Part Context

This part belongs to the SLA707xM series of 2-phase unipolar stepper motor drivers. The series integrates CMOS logic and power MOSFETs in a Power Multi-Chip Module (PMCM). Other variants in the family include SLA7070M through SLA7078M, differing primarily in output current ratings and supported step resolutions. The SLA7076MPRT specifically supports higher resolution stepping modes.

Replacement Considerations

SLA7076MPR and SLA7076MR are parameter-equivalent substitutes from Sanken Electric USA Inc. These alternatives share identical electrical specifications but may differ in packaging format. Verify pin compatibility and thermal performance before substitution.

FAQ

What step resolutions does the SLA7076MPRT support?

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

How is the maximum output current determined?

For PWM current control, the maximum output current is determined by the user's selection of a reference voltage and sensing resistor.

Does the device require special power-up sequencing?

No, special power-up sequencing is not required for this device.