STK673-011-E

Ordering number : ENA1137B STK673-011-E Thick-Film Hybrid IC 3-Phase Stepping Motor Driver http://onsemi.com Overview 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. 2, 2-3, W2-3 and 2W2-3phase 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 noise. Applications As a 3-phase stepping motor driver for transmission and reception in a facsimile. As a 3-phase stepping motor driver for feeding paper feed or for an optical system in a copying machine. Industrial machines or products employing 3-phase stepping motor driving. Features 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. ...