KA3032
6. TRAY, CHANGE MOTOR DRIVE PART
out 1
26
out 2
27
M
D
D
LEVEL SHIFT
M.S.C
CTL
13
S.W
IN
IN
FWD
14
REV
15
• Rotational Direction Control
The forward and reverse rotational direction is controlled by FWD (pin 14), and REV (pin 15) inputs. Conditions are as
follows.
INPUT
OUTPUT
FWD
REV
H
OUT 1
OUT 2
State
Brake
H
H
L
Vr
H
Vr
L
L
Forward
Reverse
Brake
H
L
H
L
L
Vr
Vr
.
where Vr is (Vcc - Vbe) / 2 = 3.65V (at Vcc=8V)
where Out1 pins are pins 24 and 26, and out2 pins are pins 25 and 27
• Motor Speed Control
- The almost maximum torque is obtained when it is used with the pins 13 (CTL) open.
- If the torque of the motor is too low, then the applied voltage at pins 13 (CTL) is 0[V].
- When motor speed controlled, the applied voltage of the pins 13 (CTL) is between 0 and 4V.
Also, if speed control is constant , the applied voltage of the pins 13 (CTL) is between 4 and 5V.
- This IC's applied maximum voltage is 6V when V is 8V.
CC
- You must not use the applied CTL voltage above 5.8V when Vcc is 8V, and 3V when V is 5V.
CC
16
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
