lv8549m ON Semiconductor, lv8549m Datasheet - Page 4

• Manufacturer Part Number: lv8549m
• Description: Bi-cmos Integrated Circuit 12v Low Saturation Voltage Drive Forward/reverse Motor Driver
• Manufacturer: ON Semiconductor

Operation explanation
1. DCM output control logic
2. About the switch time from the stand-by state to the state of operation
When ENA pin are "L", this IC has completely stopped operating. After the time of reset of about 4μs of an internal
setting, it shifts to a prescribed output status corresponding to the state of the input when the signal enters the ENA pin.
Reset of about 7μs doesn't hang even if the motor is driven from the stand-by state when either CH drives and the
output becomes an output status corresponding to the state of the input. As for full power TR between the reset time,
turning off is maintained.
3. Example of current wave type in each excitation mode when stepping motor parallel input is controlled.
ENA
H
L
Input
IN1
H
×
L
IN2
H
×
L
IN2
IN1
I2
I1
-100
-100
100
100
(%)
OUT1
(OUT3)
(OUT4)
OFF
0
0
OUT1
OUT2
H
L
(IN2)
ENA
IN1
OUT2
OFF
Stand-by state
H
L
Output
ENA input ON
OUT3
OFF
H
L
(Reset time)
1ch(2ch) forward
OUT4
OFF
LV8549M
H
L
Input switch
1CH
2CH
1ch(2ch) reverse
Remarks
Stand-by
ENA input OFF
Reverse
Reverse
Forward
Forward
Stand-by state
No.A1945-4/5