4
(Note 1): Please adjust R6 resistor value to fit current limiter target value.
(Current limit value) : 0.1
Ω
is mounted on this board. Iout (max) = 0.25V / R6 = 2.5A
(Note 2): Please adjust lock protection setting used R3 and R4 resistor value.
In this board, 68k
Ω
is mounted as R3, and 33k
Ω
is mounted as R4. It becomes automatic recovery mode,
and lock detection time is 1s.
（
（
（
（
Note 3
）
）
）
）
: Switches are used for OVP pin, BRAKE pin, CW/CCW pin and START pin settings.
Power ON sequence
1. In general, please set BRAKE switch to high level.
2. During start operation, please hold inputting PWM signal as low level.
3. On next step, please set to START switch to high level.
4. In case of motor drive voltage is 24V, please set to OVP pin to high
level. In case of motor drive voltage is 12V, please set to OVP pin to
low level.
5. Please supply VCC voltage (VCC voltage range is 9 to 28V.)
6. Please set to START switch as low level. (Motor starts operation.)
7. When PWM signal(speed control signal) inputs to PWM-in pin, a
motor speed changes based on PWM signal.
Switch name
Pin name
High/Low
Explanation
SW1
OVP
High
Motor drive voltage
：
24V
Low
Motor drive voltage
：
12V
SW2
BRAKE
High
Operation
Low
Brake
SW3
CW/CCW
High
Reverse
Low
Forward
SW4
START
High
Stop (Charge Pump circuit is stopped
）
Low
Operation (Charge Pump circuit is operation)
Power OFF sequence
1. Down PWM duty slowly, and stop
the motor rotation.
2. Set START switch to high level
position.
3. Fixed PWM signal to low level.
4. Power OFF of VCC power supply.
Power ON and power OFF sequence and notes
