STK672-400
Overview
The STK672-400 is a hybrid IC for use as a unipolar, 2-phase stepping motor driver with PWM current control.
Applications
- Office photocopiers, printers, etc.
Features
- Entry of external clock is enough to activate the micro step sinusoidal driver.
- The excitation mode of 2, 1-2, W1-2, 2W1-2, or 4W1-2 can be selected with the external pin.
- The 4-phase distributor switching timing can be set to occur either on both rising and falling edge detection or on rising edge detection only with an external pin (MODE3).
- A phase holding function is provided to prevent phase skip during switching of excitation in the course of operation.
- The motor current is set by a voltage divider formed by an external resistor connected to the Vref pin.
- The CLK input pin is provided with an internal noise filtering circuit in addition to a Schmidt circuit to increase the margin for extraneous noise.
- When set low, the ENABLE pin turns off the motor drive current for all phases and retains...
