Data Sheet 28210.05B 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. Contact Allegro for application information and additional information on device performance and logic. FEATURES AND BENEFITS ABSOLUTE MAXIMUM RATINGS AT T = 25C A Features Power supply voltages, V : 46 V(max.), 10 to 44 V normal operating range BB Load (Motor) Supply Voltage, V 46 V M ......... Logic supply voltages, V : 3.0 to 5.5 V DD Main Power Supply Voltage, V 46 V BB.......... Logic Supply Voltage, V 7 V DD ........................... Maximum output currents: 1 A, 1.5 A, 2 A, 3 A Output Current, I OUT Built-in sequencer SLA7075M.................................1.0 A SLA7076M.................................1.5 A Simplified clock-in stepping control SLA7077M.................................2.0 A Microstepping at full-, half-, quarter-, eighth-, and sixteenth-steps SLA7078M.................................3.0 A Logic Input Voltage, V Built-in sense resistor, R SInt IN .............................. 0.3 to V +0.3 V DD All variants are pin-compatible for enhanced design flexibility REF Input Voltage, V REF ZIP type 23-pin molded package (SLA package) 0.3 to V +0.3 V ............................................ DD Sense Voltage, V SInt Self-excitation PWM current control with fixed off-time off-time adjusted t < 1 s is not considered..........2 V w automatically by step reference current ratio (3 levels) Power Dissipation, P D Built-in synchronous rectifying circuit reduces losses at PWM off Without heat sink ......................4.7 W Junction Temperature, T 150C J....................... Synchronous PWM chopping function prevents motor noise in Hold mode Ambient Temperature, T .......20 to 85C A Sleep mode for reducing the IC input current in stand-by state Storage Temperature, T ...30 to 150C stg Built-in protection circuitry against motor coil opens/shorts option available Sanken Power Devices from Allegro MicroSystems Motor DriversSLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs PART NUMBERS AND OPTIONS The following are the product variants and optional features NOTE available for these variants of the SLA7070M series. The following abbreviations are used throughout this document to refer to product variants: Not all combinations of standard models and product op- PR Product with both Protection Circuitry and tions are available in high-volume production quantities. For built-in R options SInt information on product availability, and assistance with deter- R Product with the built-in R option SInt mining the IC features that are the best fit for your application, please contact our sales office or representative. Output Current, I Blanking Time OUT Part Number Protection Sequencer Clock Edge (A) (s) SLA7075MR R SInt 1 SLA7075MPR Protection Circuitry and R SInt SLA7076MR R SInt 1.5 SLA7076MPR Protection Circuitry and R Microstep 1.7 Positive SInt SLA7077MR R SInt 2 SLA7077MPR Protection Circuitry and R SInt SLA7078MR R SInt 3 SLA7078MPR Protection Circuitry and R SInt 115 Northeast Cutoff, Box 15036 2 Worcester, Massachusetts 01615-0036 Copyright 2005 Allegro MicroSystems, Inc. Motor Drivers