FAN8037 Datasheet, PDF (15/23 Pages) Fairchild Semiconductor – 7-CH Motor Driver

FAN8037 (KA3037)
7. TRAY, CHANGER,PANEL MOTOR DRIVE PART
out 1
M
out 2
24 26 29
25 27 30
D
D
CTL1,2,3
10 13 19
LEVEL SHIFT
M.S.C
S.W
IN
IN
FWD
11 14 17
REV
12 15 18
6.5V
V(out1,out2)
0
3.25V
VCTL
• Rotational direction control
The forward and reverse rotational direction is controlled by FWD (pin 11,14, 17) and REV (pin 12,15,18) and the input
conditions are as follows.
INPUT
OUTPUT
FWD
REV
OUT 1
OUT 2
State
H
H
Vp
Vp
Brake
H
L
H
L
Forward
L
H
L
H
Reverse
L
L
-
-
Hign impedance
• Where Vp(Power reference voltage) is approximately about 3.75V at PVCC2=8V ) according to equation (1).
• Where out1 pins are pins24,26,29 and out2 pins are pins25,27,30
• Motor speed control (When SVCC=PVCC2=8V)
- Maximum torque is obtained when the pins (10,13 and 19 (CTL1, 2, 3)) are open.
- If the voltages of the pins (10,13 and 19 (CTL1, 2, 3)) are 0V, the motor will not operate.
- When the control voltage of the pins 10,13 and 19 (CTL1, 2, 3) are between 0 and 3.25V, the differential output
voltage(V(out1,out2)) is about two times of control voltage. Hence, the control to the differential output gain is two.
- When the control voltage is greater than 3.25V, the output voltage is saturated at the 6.5V due to the output swing
limitation.
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