an8387s Panasonic Corporation of North America, an8387s Datasheet - Page 6

• Manufacturer Part Number: an8387s
• Description: 2-channel Linear Driver
• Manufacturer: Panasonic Corporation of North America

AN8387S
•
following relation with the input (V
The output voltage V
be limited by applying a voltage to the VLIM pin20.
when V
1) When V
2) When V
The output (V
pins 2 and 4.
Therefore, the driver’s gain G will be as follows. (when the
motor load R
Driver Input/Output Characteristics
V
P . V
V
For example, if a voltage of 3V is applied to the pin20
so that the following conditions are met.
so that the following conditions are met.
4.43V
C
CC
ref
–
G =
CC
= 4.5V
= 9V
I
A
B
= 9V
1
=
G
SW.A :
SW.B : ON
SW.C : OFF
SW.A :
SW.B : OFF
SW.C : ON
CC
+
4.45V
B
(V
=
2
|V
(V
R
= 9V and R
Input Offset (V
Output Offset (V
Dead Zone (|V
Transfer Gain (+) (G
(+), (–) Transfer Gain Ratio (R
IN
IN
(V
IN
+
IN
>V
<V
L
IN
20mV
–V
B
+1k
+
is 8.2 )
–V
–V
–V
+
5
ref
+
ref
–
–V
–B
–
) =
, the direction determining circuit operates
, the direction determining circuit operates
ref
–
ref
)
–
4
|
) between the pins18 and 17 has the
)
– 0.25V
_
R
,
0.25V
L
57.6k
of the pin17 and V
|V
G
IN
V
=
= 8.2 , the maximum value of |V
IOF
+1k
DZ
–
DZ
IOF
|
Output
=
|)
OOF
)
1k + R
B3
4.5V
20mV
B
57.6k
V
)
+
2
1
)
, V
–B
V
OOF
(V
2
1
IN
IN
,
IN
4.55V
–V
R
–V
G
G
+
ref
)
=
of the pin18 can
ref
)
) between the
G
G
4.57V
+
–
B
4
B
5
G–
Input
V
IN
+
•
Characteristics Curve
2000
1800
1600
1400
1200
1000
800
600
400
200
0
–V
2.25V |V
When the pin20 is short-circuited to GND,
|V
(V
If the pin20 is prepared to short-circuit to GND at power-on of
the set, it can be used to prevent operation error at power-on
of the motor or actuator.
When the pin20 is not used, short-circuit it to the pins1 and
10.
applied to this pin, SW.B and SW.C are turned on, I
0mA, and the base current flows to the bases of Q3 and Q4
comes to 1V or less, both drivers of the two channels are
turned off.
simultaneously to turn on Q3 and Q4. As a result, the
pins17 and 18 are almost short-circuited to P.GND.
the chip temperature of the IC comes to about 160˚C,
both drivers of the two channels are turned off. (the output
pins17, 18, 14, and 13 are short-circuited to P.GND)
0
+
The pin3 is a PC pin. If a voltage of 2.8V or more is
IN
This IC incorporates the thermal shutdown circuit. If
Similarly, if the applied voltage (V
–
–V
).
| is limited within the following range.
–
20
|
When Mounted to PCB :
+
130mV results regardless of an input error signal
–V
40
–
Ambient Temperature Ta (˚C)
| 3V
P
ICs for CD/CD-ROM Player
60
D
–Ta
Material. Glass Epoxy PCB.
Size … 5cm 5cm 0.8mm
80
j– a=83.3˚C/W
100
ref
) of the V
120
140
A
becomes
ref
pin4