STK673-010

STK673-010 - 3-Phase Stepping Motor Driver Output Current 2.4A

Overview 

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. 

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 2W2-3-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 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. 

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. 

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