The STK673-011-E is a 3-phase stepping motor driver Hybrid IC with built-in microstep 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. The basic step angle of the stepping motor can be separated as much as one-eighth 2 to 3-phase to 2W 2 to 3-phase excitation mode control quasi-sine wave current, thereby realizing low vibration and low noise.
Number of motor revolution can be controlled by the frequency of external clock input
Phase is maintained even when the excitation mode is changed
An MOI output terminal which outputs 1 pulse per 1 cycle of phase current
CW/CCW terminal which switches the rotational direction
Hold terminal which temporarily holds the motor in a state where the phase current is conducted
Schmitt inputs with built-in pull-up resistor (20kR typical)
Clock input for controlling the number of motor revolution lies in a range of 0 to 50kHz
