SLA7078MR

Product Summary

The SLA7078MR is a motor driver IC. The SLA7078MR features 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 SLA7078MR is pin-compatibile, supporting rapid design of application variants. The SLA7078MR 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.

Parametrics

SLA7078MR absolute maximum ratings: (1)Load (Motor) Supply Voltage, VM: 46 V; (2)Main Power Supply Voltage, VBB: 46 V; (3)Logic Supply Voltage, VDD: 7 V; (4)Output Current, IOUT: 3.0 A; (5)Logic Input Voltage, VIN: –0.3 to VDD+0.3 V; (6)REF Input Voltage, VREF: –0.3 to VDD+0.3 V; (7)Sense Voltage, VSInt, tw < 1 μs is not considered: ±2 V; (8)Power Dissipation, PD, Without heat sink: 4.7 W; (9)Junction Temperature, TJ: 150℃; (10)Ambient Temperature, TA: –20 to 85℃; (11)Storage Temperature, Tstg: –30 to 150℃.

Features

SLA7078MR 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