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參數(shù)資料
| 型號： | LV1605M |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 14 X 14 MM, QIP-64 |
| 文件頁數(shù)： | 23/24頁 |
| 文件大?。?/td> | 262K |
| 代理商： | LV1605M |
No. 7809-8/24
LV1605M
Test Circuit
Operational Description
APC (Automatic laser power control)
This circuit is provided to control the pickup laser power. The laser on/off state is set by the microcontroller.
RF amplifier (eye pattern output)
The (A + C) component of the pickup photodiode output current is input to FIN2 (pin 1), and the (B + D) component
is input to FIN1 (pin 2). The input current is converted to a voltage. That signal is passed through the AGC circuit and
output from the RFSM amplifier output RFSM pin (pin 48). The internal AGC circuit has a variable gain range of ±3
dB, and its time constant can be changed by adjusting the value of the external capacitor connected to PH1 (pin 50).
The bottom level of the EFM signal (the RFSM output) is controlled, and the response of this function can be
changed by adjusting the value of the external capacitor connected to BH1 (pin 59). The center value of the range of
the AGC circuit is set by the value of the resistor inserted between RFSM (pin 48) and RFS- (pin 49). If required,
these pins can also be used for EFM signal 3T compensation. When playing CD-RW discs, the input gain is increased
when the IC receives a signal from the DSP that sets RW (pin 44) low.
F2I
FIN2
AGND
DGND
AGND
AVCC
DVDD
AVCC
FIN1
E
F
TB
TE
–
TE
TESI
SCI
TH
TA
TD
–
TD
JP
TO
FD
RFSM
DRF
DEF
CLK
CLOCK
RW
CE
DAT
CL
INTI
CLV
HFL
TJP
TES
TOFF
TGL
DGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
64
63
62
61
60
58
57
56
55
54
53
52
51
50
49
TC
LDS
LDD
VR
REFI
BH1
FSC
LF2
PON
FSS
FAJON
NC
AVCC
PH1
RFS
–
FD
–
FA
–
FHO
FE
–
FH
SP
SPG
SP
–
SPD
SLEQ
SLD
SL
–
SL
+
DVCC
100k
22k
15k
33k
33k
20k
20k
F1I
100k
EI
180k
56k
2.2k
FI
180k
10k
10k
0.01
F
REF
15k
15k
REF
33k
REF
15k
REF
62k
62k
3300pF
100pF
3300pF
+
0.01
F
1pF
0.01
F
0.01
F
0.01
F
0.33
F
10
F
+
10
F
0.01
F
0.01
F
+
10
F
+
47
F
+
1
F
A13933
LV1605M
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