STK672-040

张衍波

Overview
The STK672-040 is a stepping motor driver hybrid IC that
uses power MOSFETs in the output stage. It includes a
built-in microstepping controller and is based on a
unipolar constant-current PWM system. The STK672-040
supports application simplification and standardization by
providing a built-in 4 phase distribution stepping motor
controller. It supports five excitation methods: 2 phase,
1-2 phase, W1-2 phase, 2W1-2 phase, and 4W1-2 phase
excitations, and can provide control of the basic stepping
angle of the stepping motor divided into 1/16 step units. It
also allows the motor speed to be controlled with only a
clock signal.
The use of this hybrid IC allows designers to implement
systems that provide high motor torques, low vibration
levels, low noise, fast response, and high-efficiency drive.
Compared to the earlier Sanyo STK672-010 Series, the
STK672-040 features a smaller package, fewer external
components, and controller improvements for even higher
efficiency and even higher performance microstepping
motor drive.
Applications
? Facsimile stepping motor drive (send and receive)
? Paper feed and optical system stepping motor drive in
copiers
? Laser printer drum drive
? Printer carriage stepping motor drive
? X-Y plotter pen drive
? Industrial robots and other stepping motor applications
Features
? Can implement stepping motor drive systems simply by
providing a DC power supply and a clock pulse
generator.
<Control Block Features>
? One of five drive types can be selected with the drive
mode settings (M1, M2, and M3)
—2 phase excitation drive
—1-2 phase excitation drive
—W1-2 phase excitation drive
—2W1-2 phase excitation drive
—4W1-2 phase excitation drive
? Provides four freely selectable modes for the vector
locus during microstepping drive: circular mode, one
inside mode, and two outside modes.
? Phase retention even if excitation is switched.
? The excitation phase state can be verified in real time
from the MO1, MO2, and MOI signal output pins.
? The CLK input counter block can be selected to be one
of the following by the high/low setting of the M3 input
pin.
—Rising edge only
—Both rising and falling edges
Note*: Conditions: VCC1 = 24 V, IOH = 1.5 A, 2W1-2 drive
used.
Continued on next page.