MICROSTEPPING, UNIPOLAR PWM, HIGH-CURRENT MOTOR CONTROLLER/DRIVER

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).

BenefitS AND FEATURES
■ Cost-Effective, Multi-Chip Solution
■ ‘Turn-Key’ Motion-Control Module
■ Motor Operation to 3 A and 46 V
■ 3rd Generation High-Voltage FETs
■ 100 V, Avalanche-Rated NMOS
■ Low rDS(on) NMOS Outputs
■ Advanced, Improved Body Diodes
■ Microstepping Unipolar Drive
■ High-Efficiency, High-Speed PWM
■ Independent PWM Current Control (2-Phase)
■ Digitally Programmable PWM Current Control
■ Low Component-Count PWM Drive
■ Low Internal-Power Dissipation
■ Electrically Isolated Power Tab
■ Logic IC- and µP-Compatible Inputs
■ Machine-Insertable Package