SLA7078MPR

Product Summary

The SLA7078MPR 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. The SLA7078MPR is pincompatibile, 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.

Parametrics

Absolute maximum ratings:(1)Load (Motor) Supply Voltage, VM: 46V; (2)Main Power Supply Voltage, VBB: 46V; (3)Logic Supply Voltage, VDD: 7V; (4)Output Current, IOUT of SLA7078M: 3.0A; (5)Logic Input Voltage, VIN: 鈥?.3 to VDD+0.3V; (6)REF Input Voltage, VREF: 鈥?.3 to VDD+0.3V; (7)Sense Voltage, VSInt, tw < 1 渭s is not considered: 卤2V; (8)Power Dissipation, PD Without heat sink: 4.7 W; (9)Junction Temperature, TJ: 150掳C; (10)Ambient Temperature, TA: 鈥?0 to 85掳C; (11)Storage Temperature, Tstg: 鈥?0 to 150掳C.

Features

Features: (1)Power supply voltages, VBB : 46 V(max.), 10 to 44 V normal operating range; (2)Logic supply voltages, VDD: 3.0 to 5.5 V; (3)Maximum output currents: 1 A, 1.5 A, 2 A, 3 A; (4)Built-in sequencer; (5)Simplified clock-in stepping control; (6)Microstepping at full-, half-, quarter-, eighth-, and sixteenth-steps; (7)Built-in sense resistor, RSInt; (8)All variants are pin-compatible for enhanced design flexibility; (9)ZIP type 23-pin molded package (SLA package); (10)Self-excitation PWM current control with fixed off-time; off-time adjusted automatically by step reference current ratio (3 levels); (11)Built-in synchronous rectifying circuit reduces losses at PWM off; (12)Synchronous PWM chopping function prevents motor noise in Hold mode; (13)Sleep mode for reducing the IC input current in stand-by state; (14)Built-in protection circuitry against motor coil opens/shorts option available.

Diagrams

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