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