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)： 5/6頁
文件大?。?/td> 69K
代理商： AN8387S
ICs for CD/CD-ROM Player
AN8387S
Description
Equivalent Circuit
DC Voltage
Pin No.
Symbol
D2+
I/O
O
(2.7V)
14
D2–
O
(0.3V)
17
D1–
O
(0.3V)
18
D1+
O
(2.7V)
13
Non-inverting output pin
for the channel-2 driver
Inverting output pin for the
channel-2 driver
Inverting output pin for the
channel-1 driver
Non-inverting output pin
for the channel-1 driver
or
or
PV
CC
PGND
13
18
14
17
I
Pin Descriptions (Cont.)
Operational Description
The AN8387S incorporates the two channels of drivers. Since both channels have the identical functions, the following
describes the channel-1 driver.
Block Diagram (Channel 1 driver)
An error signal (V
IN
) input to the pin2 is converted into the absolute value input current I
A
through the error amplifier and
current absolute value circuit. The value of I
A
is as follows.
+
–
R
IN
17
18
19
20
Direction
Decision
SW.A
SW.B
SW.C
I
A
I
A
I
A
V
ref
S.W
A
Thermal
Shutdown
PC
SW.A
SW.B
I
=0
SW.B
SW.C
Q1
Q2
R1
57.6
k
R2
57.6
k
SW. C
Q3
1k
+
2
4
3
–
Q4
–
+
PV
CC
VLIM
Current
Absolute
Value
Circuit
(R
L
=8.2
)
2
Error Amp.
I
Supplementary Explanation
V
ref
(= 1
CC
)
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