Stepper Motor Driver AD1431
YA7179-1/2
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3. Specifications
Product Name : Stepper Motor Driver
Model : AD1431
Electrical
specifications
Input voltage
Control power : DC12V -10% to DC24V +10%
Capacity: 2A, with fuse.
Control method
Bipolar constant current
Excitation method
2 phase (FULL), 1-2 phase (HALF), W1-2 phase (1/4),
2W1-2 phase (1/8), 4W1-2 phase (1/16)
Output current
0.11A (MIN) to 1.20A (MAX) / phase
Selectable by the rotary
switch 2
(0.07 to 1.20A can be set by the variable resistor VR1)
Auto current down
(ACD) control *1
Current down operation starts in approximately 0.1s after pulse
input stops and lowers the output current automatically.
Selectable from 25%, 50% or 75% of the current by using the
switch.
Input interface
Pins 1 to 4 of CN2:
Photocoupler (Toshiba TLP109 or equivalent) *5
Built-in 300 ohm resistor
Forward voltage 1.64V (TYP)
Recommended forward current I
F
:11mA
(Operation forward current I
F
:10 to 20mA)
Maximum response frequency 160kpps
(Input voltage 5V, duty rate 50%)
Pins 5 to 8 of CN2 :
Photocoupler (Toshiba TLP281 or equivalent) *5
Built-in 330 ohm resistor
Forward voltage 1.15V (TYP)
Recommended forward current I
F
:12mA
(Operation forward current I
F
:5 to 50mA)
Output interface
Pins 9 to 10 of CN2:
Photocoupler (Toshiba TLP281 or equivalent) *5
Recommended collector current I
c:
10mA
(Saturation voltage between collector and emitter : 0.7V)
CW/CCW
command pulse
One of the following methods can be selected by the switch. *2
1. Two pulse method (CW/CCW)
2. One pulse method (CLK/DIR)
Photocoupler ON: CCW
Photocoupler OFF : CW
MOT/OFF signals
Motor excitation signal
Photocoupler ON : Excitation OFF
Photocoupler OFF : Excitation ON
ACD/OFF signals
Auto current down signal
Photocoupler ON : ACD_OFF
Photocoupler OFF : ACD_ON
EORG output
signals
Display signal of initial excitation condition *3
Photocoupler ON : Initial excitation
Photocoupler OFF: other than initial excitation
