Sanken Power Devices

from Allegro MicroSystems

SLA7075M, SLA7076M,

SLA7077M, and SLA7078M

Motor Driver IC Family

The SLA7075M, SLA7076M, SLA7077M, and SLA7078M motor driver

ICs feature 2-phase stepper unipolar drivers. The clock-in type input interface

allows simplified control logic, and options for built-in sense current detection

and load circuit short or open protection (patent pending) provide lower loss,

and lower thermal resistance. All products in the SLA7070M series are pin-

compatibile, supporting rapid design of application variants.

The built-in excitation distribution circuit (sequencer) allows motor control

using only the CLOCK signal for simple operations (rotate/stop), with motor

speed control by frequency input into CLOCK pin. This eliminates logic signal

lines required for conventional phase-input methods, and reduces demand on

heavily-used CPUs.

device performance and logic.

Features

Maximum output currents: 1 A, 1.5 A, 2 A, 3 A

Built-in sequencer

Simplified clock-in stepping control

Microstepping at full-, half-, quarter-, eighth-, and sixteenth-steps

All variants are pin-compatible for enhanced design flexibility

ZIP type 23-pin molded package (SLA package)

Self-excitation PWM current control with fixed off-time; off-time adjusted

automatically by step reference current ratio (3 levels)

Built-in synchronous rectifying circuit reduces losses at PWM off

Synchronous PWM chopping function prevents motor noise in Hold mode

Sleep mode for reducing the IC input current in stand-by state

Built-in protection circuitry against motor coil opens/shorts option available

FEATURES AND BENEFITS

ABSOLUTE MAXIMUM RATINGS

SLA7075M .................................1.0 A

SLA7076M .................................1.5 A

SLA7077M .................................2.0 A

SLA7078M .................................3.0 A

Without heat sink ...................... 4.7 W