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參數(shù)資料
| 型號： | AN8387S |
| 廠商： | PANASONIC CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | 2-channel Linear Driver |
| 中文描述： | DISK DRIVE MOTOR CONTROLLER, 0.5 A, PDSO20 |
| 封裝： | 0.300 INCH, PLASTIC, SOP-20 |
| 文件頁數(shù)： | 6/6頁 |
| 文件大?。?/td> | 69K |
| 代理商： | AN8387S |
ICs for CD/CD-ROM Player
AN8387S
I
A
=
R
IN
+1k
|V
IN
–V
ref
|
(V
+
–V
–
) =R
IN
+1k
Therefore, the driver’s gain G will be as follows. (when the
motor load R
L
is 8.2
)
57.6k
(V
IN
–V
ref
)
G =
(V
+
–V
–
)
(V
IN
–V
ref
)
1k
+ R
IN
57.6k
=
–V
–
| is limited within the following range.
2.25V
≤
|V
+
–V
–
|
≤
3V
When the pin20 is short-circuited to GND,
|V
+
–V
–
|
≤
130mV results regardless of an input error signal
(V
IN
).
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.
The pin3 is a PC pin. If a voltage of 2.8V or more is
applied to this pin, SW.B and SW.C are turned on, I
A
becomes
0mA, and the base current flows to the bases of Q3 and Q4
simultaneously to turn on Q3 and Q4. As a result, the
pins17 and 18 are almost short-circuited to P.GND.
This IC incorporates the thermal shutdown circuit. If
the chip temperature of the IC comes to about 160C,
both drivers of the two channels are turned off. (the output
pins17, 18, 14, and 13 are short-circuited to P.GND)
Similarly, if the applied voltage (V
ref
) of the V
ref
pin4
comes to 1V or less, both drivers of the two channels are
turned off.
The output voltage V
_
of the pin17 and V
+
of the pin18 can
be limited by applying a voltage to the VLIM pin20.
For example, if a voltage of 3V is applied to the pin20
when V
CC
= 9V and R
L
= 8.2
, the maximum value of |V
+
When Mounted to PCB :
Ambient Temperature Ta (C)
P
D
0
20
40
60
80
100
120
140
0
200
400
600
800
1000
1200
1400
1600
1800
2000
Material. Glass Epoxy PCB.
×
5cm
×
0.8mm
θ
j– a=83.3C/W
– 0.25V
C
–
B
1
B
2
|V
DZ
|
4.43V
4.45V
0.25V
V
IOF
V
1
, V
2
Output
B
4
G–
B
5
Input
V
IN
4.5V
B3
4.55V
4.57V
V
CC
= 9V
P.V
CC
= 9V
V
ref
= 4.5V
V
OOF
G
+
=
B
5
–B
4
20mV
G
–
=
B
2
–B
1
20mV
R
G
=G
+
G
–
Driver Input/Output Characteristics
Input Offset (V
IOF
)
Output Offset (V
OOF
)
Dead Zone (|V
DZ
|)
Transfer Gain (+) (G
+
)
(+), (–) Transfer Gain Ratio (R
G
)
Characteristics Curve
P
D
–Ta
,
,
+
1) When V
IN
>V
ref
, the direction determining circuit operates
so that the following conditions are met.
SW.A :
SW.B : ON
SW.C : OFF
2) When V
IN
<V
ref
, the direction determining circuit operates
so that the following conditions are met.
SW.A :
SW.B : OFF
SW.C : ON
The output (V
+
–V
–
) between the pins18 and 17 has the
following relation with the input (V
IN
–V
ref
) between the
pins 2 and 4.
–
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