Product Information SI-7321M Motor Driver IC Introduction This document describes the function and features of SI-7321M, a unipolar 2-phase stepping motor driver IC.
This device uses PWM constant current-control, and provides user-configurable sequencer parameters.
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.
Lower thermal resistance results from the innovative multi-chip internal structure, which separates the main control IC (MIC) from the four heat-generating MOSFETs, and places wide output terminals at package corners to enhance thermal di...

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