STK673-010-E

• Number of motor revolution can be controlled by the frequency of external clock input.
• 4 types of modes, i.e., 2, 2-3, W2-3 and 2W2-3-phase excitations, are available which can be selected based on rising of clock signals, by switching Highs and Lows of Mode A and Mode B terminals.
• Setting a Mode C terminal Low allows an excitation mode that is based on rising and falling of a clock signal.
By setting the Mode C terminal Low, phases that are set only by Mode A and Mode B can be changed to other phases as follows without changing the number of motor revolution: 2-phase may be switched to 2-3-phase; 2-3-phase may be switched to W2-3-phase; and W2-3-phase may be switched to 2W2-3-phase.
• Phase is maintained even when the excitation mode is changed

The STK673-010-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.

STK673-010-E 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. 2, 2-3, W2-3 and 2W2-3-phase excitation modes are available. The basic step angle of the stepping motor can be separated as much as one-eighth 2-3- phase to 2W2-3-phase excitation mode control quasi-sine wave current, thereby realizing low vibration and low  oise.