FAN8001 Fairchild Semiconductor, FAN8001 Datasheet - Page 8

• Manufacturer Part Number: FAN8001
• Description: 5-Channel Motor Driver
• Manufacturer: Fairchild Semiconductor

FAN8001D
3. REGULATOR
• The V
• The external circuit is composed of the transistor, KSB772 and a capacitor, 100 F, and the capacitor is used as a ripple filter
• The output voltage, V
4. LOADING MOTOR DRIVER
• The input voltages of (5V and 0V) or (0V and 5V) pairs are applied to the input pin #9 and #14 respectively.
• When the input voltages are applied to the input pin #9 and #14, then the output of the comparator is decided depends on the
• As shown in the above diagram, the difference V, [V
• The output characteristics is as follows,
• When the rotation speed control of the loading motor is desired, refer to the follows.
and should have a good temperature characteristics.
V
R2 = R3
input voltage status.
the motor. The direction of the motor is decided by the voltage difference, + V and
- If pin # 9=5V and #14=0V, then pin # 15=+ V and #16=
- If pin # 9=0V and #14=5V, then pin # 15=
- If pin # 9=5V and #14=5V, then V=0V, hence the motor stop.
- If pin # 9=0V and #14=0V, then V=0V, hence the motor stop.
OUT
REF BG
14
= V
9
REF BG
is the output voltage of the band-gap-referenced biasing circuit and is the reference voltage of the regulator.
2 = 2.5 2 = 5V (R2 = R3)
OUT
+
20
COMP
is determined as follows.
VREF BG
+ V
V
V
V
D1
R1
D2
I
REF1
REF1
R
R
I
I
V and #16=+ V, hence the motor turn in reverse direction.
+
REF1
+
+
Buffer
Buffer
+ (I R)] - [V
8
V, hence the motor turn in forward direction.
5
R2
6
R3
REF1
KSB772
Q1
Q3
-(I R)], is applied to the both terminals of
+
CE
100 F
V
(5V)
15
OUT
V
V.
M
+ V
16
Q2
Q4