SLA7042M

SLA7042M AND SLA7044M MICROSTEPPING, UNIPOLAR PWM, HIGH-CURRENT MOTOR CONTROLLER/DRIVER OUT A STROBE A REF/ENABLE A CNTRL SPLY A CLOCK A SERIAL DATA A GROUND A OUT A SENSE A SENSE B OUT B GROUND B STROBE B REF/ENABLE B CNTRL SPLY B CLOCK B SERIAL DATA B OUT B Data Sheet 28202A* The SLA7042M and SLA7044M are designed for high-efficiency and high-performance microstepping operation of 2-phase, unipolar stepper motors. Microstepping provides improved resolution without limiting step rates, and provides much smoother low-speed motor operation. An automated, innovative packaging technology combined with power NMOS FETs and monolithic CMOS logic/control circuitry advances power multi-chip modules (PMCMs™) toward the complete integration of motion control. Each half of these stepper motor controller/drivers operate independently. The 4-bit shift registers are serially loaded with motor phase information and output current-ratio data (eight levels). The combination of user-selectable current-sensing resistor, linearly adjustable reference voltage, and digitally selected output current ratio provides users with a broad, variable range of of full, half, and microstepping motor control (IOUT ≈ [VREF/3 RS] Current Ratio). Each PMCM is rated for a maximum motor supply voltage of 46 V and utilizes advanced NMOS FETs for the high-current, high-voltage driver outputs. The avalanche-rated (≥100 V) FETs provide excellent ON resistance, improved body diodes, and very-fast switching. The m...