Stepper Motor Driver AD1431
YA7179-1/2
- 5 -
*1 Auto current down
Auto current down is a function to prevent heat generation by adjusting to set lower current after pulse
signals stop.
This driver allows to lower the current to 25%, 50% and 75% of the normal current to drive the motor.
*2 One pulse mode and two pulse mode
One pulse mode
It is a method that the rotation direction CW/CCW is decided by whether the DIR photocoupler is
ON or OFF when pulses are input to the CLK terminal.
Two pulse mode
It is a method that the rotation direction CW/CCW is decided by whether the pulse is input to the
CW terminal or that CCW terminal.
In the case that CLK(+) and
DIR(+) are connected to +5V.
In the case that CW(+) and
CCW(+) are connected to +5V.
CCW(-)
Motor stops
CCW
rotation
Motor stops
CW
rotation
Rotation
direction
CW(-)
Longer than 2
μ
s
OFF
ON
OFF
ON
+5V
CW(+)
CW(-)
CCW(+)
CCW(-)
AD1431
DIR(-)
Motor stops
CCW
rotation
Motor stops
CW
rotation
Rotation
direction
CLK(-)
Longer
than
1
μ
s
Longer
than
1
μ
s
OFF
ON
OFF
ON
+5V
CLK(+)
CLK(-)
DIR(+)
DIR(-)
AD1431
