STK673-010GEVB, Evaluation Board for the STK673-010-E is a 3-phase stepping motor driver hybrid IC with built-in micro-step controller having a bipolar constant current PWM system, in which a power MOSFET is employed at an output stage. It includes a 3-phase distributed controller for a 3-phase stepping motor to realize a simple configuration of the motor driver circuit. The number of motor revolution can be controlled by the frequency of external clock input