15
IC61 : TA2150FN (RF/DIGITAL SERVO)
BLOCK DIAGRAM
PIN FUNCTION
PIN No.
NAME
I/ O
DESCRIPTION
REMARK
VCC
RFGC
GMAD
FNI
FPI
TPI
TNI
MDI
LDO
SEL
TEN
2VRO
TEN
TEO
SBAD
FEO
FEN
SEB
VRO
RFRP
BTC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Power supply input terminal
RF amplitude adjustment control signal input
terminal. Controlled by 3 PWM signal
(PWM carrier = 88.2 kHz)
Open loop gain adjustment terminal for AGC amp.
Main beam l-V amp input terminal.
Main beam l-V amp input terminal.
Sub beam l-V amp input terminal.
Sub beam l-V amp input terminal.
Monitor photo diode amp input terminal.
Laser diode amp input terminal.
Laser diode control signal input terminal and APC
circuit ON/OFF control signal terminal.
Tracking error balance adjustment signal input terminal.
Controlled by 3-PWM signal.
(PWM carrier = 88.2 kHz)
Reference voltage (2vro) output terminal.
2VRO=4.2V when Vcc=5V
TE amp negative input terminal.
TE error signal output terminal.
Sub beam adder signal output terminal.
Focus error signal output terminal.
FE amp negative input terminal.
RFRP output circuit switching terminal.
Reference signal(VRO) output terminal.
VRO = 2.1V when Vcc=5V
Track count signal output terminal.
Time constant adjustment terminal for bottom detection.
-
3 signal input
(2 VRO, VRO, GND)
(Note1)
Connected to pin diode
output B+D
(through resistor).
Connected to pin diode
output A+C
(through resistor).
Connected to pin diode
output F.
Connected to pin diode
output E.
Connected to monitor photo
diode.
Connected to laser diode control
circuit.
3 signals input.
(Vcc, HIZ,GND)
3 signals input.
(2VRO, VRO, GND)
-
Connected to TEO through
feedback resistor.
-
-
-
Connected to FEO through
feedback resistor.
Low(GND) is for nomal use.
-
-
Adjusted by capacitance.
-
I
I
I
I
I
I
I
O
I
I
O
I
O
O
O
I
I
O
O
I
SEL
GND
HIZ
Vcc
RFRP Detct
Frequency
LOW
LOW
High
LDC
SW1 SW2 SW3
ON OFF OFF
OFF ON ON
OFF ON ON
SEB
GND
HIZ
Vcc
Bottom Detect
ON
ON
OFF
Peak Detect
ON
ON
ON
PIN No.
NAME
I/ O
DESCRIPTION
REMARK
-
Adjusted by capacitance.
-
-
Low(GND) is for 5 times gain.
Connected to RFO through
capacitance.
-
-
Connected to pin-diode
output A+B+C+D
(through resistor.
16
RFGC
I.I
I.I
40pF
15pF
3pF
36pF
20 k
20 k
20 k
20 k
11 k
11 k
90 k
238 k
238 k
13 k
83 k
2.26 k
1.4 k
2.9 k
48 k
10 k
10 k
10 k
50 k
15 k
15 k
10 k
30 k
20 k
1 k
SW1
20 k
150 k
1 k
1 k
60 k
60 k
100
100 k
20 k
150 k
30 k
21.82 k
40pF
3pF
100 k
12 k
12 k
60 k
20pF
A
GC Amp
.
BO
TT
OM
PEAK
15pF
SW1
SW2
SW3
3 ST
A
T
E
DET
.
LDO
SEL
TEB
2VR
O
TEN
TEO
SBAD
MDI
TNI
TPI
FPI
FNI
GMAD
RFGC
VCC
RFCT
BTC
RFRP
VR
O
SEB
FEN
FEO
PKC
RFRPIN
RFGO
GVSW
A
GCIN
RFO
GND
RFN2
+
+
+
+
+
+
+
+
+
+
+
+
+
17
18
19
20
21
22
23
24
25
26
27
28
29
30
15
14
13
10
11
12
9
8
7
6
5
4
3
2
1
+
+
RFCT
PKC
RFRPIN
RFGO
GVSW
AGCIN
RFO
GND
RFN2
22
23
24
25
26
27
28
29
30
RFRP signal center level output terminal.
Time constant ajustment terminal for peak detection.
Input terminal for track count signal output amp.
Output terminal for RF signal amplitude adjustment amp.
Amp(AGC, FE, TE) gain switching terminal.
Input terminal for RF signal amplitude adjustment amp.
Output terminal RF signal amp.
Ground terminal.
Input tetminal for RF signal amp.
O
I
I
O
I
I
O
-
I
GVSW
GND
HIZ
Vcc
Mode
CD-RW
Nomal
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