Mitsubishi M62475FP Datasheet
MITSUBISHI SOUND PROCESSOR ICs
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATICADJUSTMENTCDPREAMPLIFIER SERVOCONTROLLER
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
M62475FP
DESCRIPTION
The M62475FP is an IC that contains preamplifier/servo amplifier necessary for optical pickup servo
control for CD player.
This IC also supports automatic adjustment with microcomputer control.
FEATURES
Pickup servo control can consist of the M62475FP only
Supporting 3-beam system
Built-in serial data command interface with MCU to reduce load
on MCU
Built-in circuit for automatically adjusting tracking balance,
tracking/focus gain
Built-in internal self reset circuit
RECOMMENDED OPERATING CONDITIONS
Supply voltage range..............................................VCC=4.5 to 5.5V
Rated supply voltage.......................................................... VCC=5V
SYSTEM CONFIGURATION
HF
PREAMPLIFIER
OPTICAL
PICK-UP
PD
FE PREAMPLIFIER
FOCUS
SEARCH
FOCUS ACTUATOR
FOCUS
SERVO
AUTOMATIC
ADJUSTMENT
Outline 42P2R-A
0.8 mm pitch 450 mil SSOP
(8.4 mmX17.5 mmX2.0 mm)
M62475FP
MCU I/F
RESET
DSP for CD
MCU
for
CONTROL
LD
APC
TE PREAMPLIFIER
MITSUBISHI
ELECTRIC
TRACKING
SERVO
TRACKING
ACTUATOR
SLIDE SERVO
SLIDE
MOTOR
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MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONT ROLLER
PIN CONFIGURATION (TOP VIEW)
A
SGT
TE
TEG
TG1SW
TE OUT
TC/SHOCK
TS
TG2SW
TS
TS OUT
SS
SS
SS OUT
DETFIL
BIAS
GND
1
2
B
C
3
E
4
5
F
6
7
8
9
10
11
+
12
13
-
14
15 28
+
16 27
-
17 26
18 25
19 24
20 23
21 22
Outline 42P2R-A
42
41
40
39
38
37
36
35
34
M62475FP
33
32
31
30
29
ABC
HFI
HFO
MRC
APC OUT
-
APC
+
APC
CFSR
SGF
FE
-
FEG
-
FS
FSOUT
CC
V
RIREF
CLPF
DOUT
MSD
MCK
JP1/SG
MLA/DIS
BUILT-IN FUNCTION
•IV amplifier
•HF amplifier:HF (High Frequency Amp.)
•Focus Error Amplifier:FE (Focus Error Amp.)
•Focus Servo Amplifier:FS (Focus Servo Amp.)
•Tracking Error Amplifier:TE (Tracking Error Amp.)
•Tracking Servo Amplifier:TS (Tracking Servo Amp.)
•Sledge Motor Servo Amplifier:SS (Sledge Servo Amp.)
•Switching Circuit for Jump Brake:
TG1SW, TG2SW (Tracking Gain SW)
JF SW, JR SW (Jump Forward/Reverse SW)
SF SW, SR SW (Sledge Forward/Reverse SW)
•Focus Search Circuit
Search Signal Generator
FSOK Detector
•Track Cross Detector: TC Det (Track Cross Detector)
•Shock Detector: SC Det (Shock Detector)
•Logic Controller:
Serial Data Command Interface
Jump, Brake, Focus Search Control
Adjustment Control
•Vcc/2 generation circuit
•Auto Laser Power Control: APC (Automatic laser Power Control)
•HF Bottom Level Detector
•MR Detector
•Automatic Adjustment Circuit
Tracking balance adjustment circuit
Tracking gain adjustment circuit
Focus gain adjustment circuit
Gain adjustment signal generation and phase detection circuit
IC INTERNAL BLOCK DIAGRAM
HF
REVERSE INPUT
ABC
OUTPUT
A+B+C
A
INPUT
CONSTANT
FOR MIRROR
HF
OUTPUT
HF
AMPLIFIER
10k 10k 4.7k
I/V
AMPLIFIER
18k39k39k
ABCEF
B
INPUT
C
INPUT
REVERSE INPUT
APC
OUTPUT
MR
MIRROR
220k
220k
220k
E
INPUT
F
INPUT
CONSTANT
FOR
APC
38 32
220k
5 11
SGT
OUTPUT
TE REVERSE
FOCUS
SEARCH
APC NONREVERSE
INPUT
36 34
35
APC
FOCUS
SEARCH
A-B
TE
AMPLIFIER
7 9
8
TE GAIN
CONTROLTEOUT
INPUT
REVERSE
SGF
OUTPUT
TG1
2.2k
TS1
TG1
SW
FE
INPUT
FE GAIN
CONTROLFSOUTPUT
334142
SW
TC/SH SW
100k
SW
1021
TC/
SHOCK
FS
REVERSE
INPUT
2.2k
22k
FS
SW
FE
AMPLIFIER
TC/SHOCK DET
TG2
47k
SW
47k
TS NON-
REVERSE
INPUT
POWER
SUPPLY
REFERENCE
CURRENT
30 29 27
FS
12k
SW
ADJUST
JRSWJF
TS
AMPLIFIER
AMPLIFIER
22k
13 14 16
TS
REVERSE
INPUT
TG2
SWTSOUTPUT
CONSTANT
FOR
ADJUSTMENT
FILTER
DATA
INPUT
DATA
OUTPUT
28 22
15 21
SS
SW
22k
SS NON-
REVERSE
INPUT
REVERSE
INPUT
26 24
25
47k
SRSWSF
SW
17 19
18
SS
OUTPUT
INPUT
SS
CONSTANT FOR
ADJUSTMENT
CLOCK
INPUT
I/F
RESET
56k
SS
AMPLIFIER
REFERENCE
VOLTAGE
FILTER
JP1
INPUT
233140 39 37
47k
(COM)
20123 4 6
LATCH
INPUT
47k
BIAS
VCC/2
GND
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AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONT ROLLER
PIN DESCRIPTION
Pin No. Symbol Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
A
B
C
E
F
SGT
-
TE
TEG
TG1 SW
TE OUT
TC/SHOCK
+
TS
TG2 SW
-
TS
TS OUT
+
SS
-
SS
SS OUT
DET FIL
BIAS
GND
MLA/DIS
JP1/SG
MCK
MSD
DOUT
CLPF
IREF
Vcc
FSOUT
-
FS
FEG
-
FE
SGF
CFSR
+
APC
-
APC
APC OUT
MRC
HF OUT
-
HF
ABC
I-V amplifier A input
I-V amplifier B input
I-V amplifier C input
I-V amplifier E input
I-V amplifier F input
Tracking servo signal output
TE amplifier reverse input
TE amplifier gain control
Tracking gain select switch 1
TE amplifier output
Tracking cross/shock detector input
TS amplifier non-reverse input
Tracking gain select switch 2
TS amplifier reverse input
TS amplifier output
SS non-reverse input
SS amplifier reverse input
SS output
Detector filter for gain adjustment
Vcc/2 voltage output
Ground
Latch of serial data from microcomputer to servo IC/discharge of LPF for automatic adjustment
Control signal of 1 track jump brake pluse/Input of gain adjustment clock
Serial data transfer clock from microcomputer to servo IC
Microcomputer serial data
Output of data to microcomputer
Connects capacitor for determining the constant for automatic adjustment LPF
Connects resistance for setting current value of reference supply current
Power supply
FS amplifier output
FS amplifier reverse input
FE amplifier gain control
FE amplifier reverse input
Focus servo signal output
Connects the capacitor to determine the constant for focus search waveform
APC amplifier non-reverse input
APC amplifier reverse input
APC amplifier output
Constant for mirror
HF amplifier output
HF amplifier reverse input
IV amplifier (A+B+C) output
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
ABSOLUTE MAXIMUM RATINGS (Ta=25˚C, unless otherwise noted)
Symbol Parameter Ratings Unit
VCC
VI
Pd
K
T
opr
Tstg
Supply voltage
Input voltage
Power dissipation
Thermal derating (Ta 25˚C)
Operating ambient temperature
Storage temperature
5
0 to V
CC
750
7.5
-20 to +75
-40 to +125
MITSUBISHI
ELECTRIC
V
V
mV
mW/˚C
˚C
˚C
3
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MITSUBISHI SOUND PROCESSOR ICs
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONT ROLLER
ELECTRICAL CHARACTERISTICS (Ta=25˚C, Vcc=5V, f=1kHz, CBA=100, unless otherwise noted)
M62475FP
Block
—
HF
FS OK
MR
APC
FE
FS
FSR
TE
TS
Symbol
Icc
V
REF
GVHFAB
GVHFC
fHF
VHHF
VLHF
VOSHF
VTFK
RMN
RMJ
fMR
GVAP
ATTAP
VHAP
VLAP
VOSAP
GVFE
VHFE
VLFE
BALFE
GVFS
ATTFS
VHFS
VLFS
VOSFS
VFSR
VFSR
VFZC
GVTE
VHTE
VLTE
VOSTE
BALTE
GVTS
ATTTS
VHTS
VLTS
VOSTS
Parameter
Circuit current
Reference voltage
Gain (input A/B)
Gain (input C)
Frequency characteristics
Output voltage "H"
Output voltage "L"
Output offset
FSOK level
Ratio (normal)
Ratio (jump)
Frequency characteristics
Gain
Attenuation (APC OFF)
Output voltage "H"
Output voltage "L"
Input offset
Gain
Output voltage "H"
Output voltage "L"
Balance
Gain
Attenuation (FS OFF)
Output voltage "H"
Output voltage "L"
Output offset
+
Focus search voltage
-
Focus search voltage
Focus zero cross voltage
Gain
Output voltage "H"
Output voltage "L"
Output offset
Track balance
Gain
Attenuation (TS OFF)
Output voltage "H"
Output voltage "L"
Output offset
Test conditions
With no signal provided, after reset
With no signal provided, after reset
f=500kHz,Vi=0.5V
f=500kHz,Vi=0.5VP-P
Vi=0.5VP-P
Vi=4.0V
Vi=1.0V
VREF reference
VREF reference
"Shock" mode
"Brake" mode
"Shock" mode
Vi=20mVrms
Comparison with GVAP
Vi=4.0V
Vi=1.0V
VREF reference
Vi=10mVrms
Vi=4.0V
Vi=1.0V
Comparison with G
Vi=50mVrms
Comparison with GVFS
Vi=4.0V
Vi=1.0V
VREF reference
+
-
VREF reference, pin
VREF reference, pin
VREF reference
Vi=50mVrms
Vi=4.0V
Vi=1.0V
VREF reference
VREF reference
Vi=50mVrms
Comparison with G
Vi=4.0V
Vi=1.0V
VREF reference
P-P
VFE
35
35
VTS
Limits
Min. Typ.
20.0 30.0
2.4 2.5
3.1 5.1
9.7 11.7
1.4 2.0
3.5 4.0
—
-60 0
-0.22 -0.16
0.35 0.45
0.46 0.56
4.0
-10 0
3.5 4.0
—
19.3 21.3
3.5 4.0
—
-50 0
+0.6 +0.8
-1.0 -0.8
-0.22 -0.16
7.0 9.0
3.5 4.0
—
-25 0
-1.5 +1.5
-0.6 1.4
3.5 4.0
—
-25 0
1.0
20 30
25 27
—
60
—
——
24
1.0
-2 0
——
60
1.0
1.0
——
60
1.0
Max.
-0.10
-0.10
40.0
2.6
7.1
13.7
—
—
1.5
+60
0.55
0.66
—
29
—
—
1.0
+10
6
—
1.5
+2
23.3
—
1.5
+50
+1.0
-0.6
11.0
—
1.5
+25
+4.5
3.4
—
1.5
+25
Unit
mA
V
dB
dB
MHz
V
V
mV
V
—
—
kHz
dB
dB
V
V
mV
dB
V
V
%
dB
dB
V
V
mV
V
V
V
dB
V
V
mV
%
dB
dB
V
V
mV
MITSUBISHI
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MITSUBISHI SOUND PROCESSOR ICs
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONT ROLLER
ELECTRICAL CHARACTERISTICS (Ta=25˚C, Vcc=5V, f=1kHz, CBA=100, unless otherwise noted) (cont.)
M62475FP
—
TC
SHOCK
TG
SS
RESET
ADJ
CMP
SG
Symbol
VJF
VJR
+
TC
V
-
VTC
+
VSH
-
VSH
ATG1ON
ATG1OFF
ATG2ON
ATG2OFF
GVTS
ATTSS
VHSS
VLSS
VOSSS
VSF
VSR
VRST
VORST
GVFE(max)
GVFE(min)
GVTE(max)
GVTE(min)
BALTE(max)
BALTE(min)
+
VPhFE
VPhFE
+
VPhTE
VPhTE
+
VBAL
-
VBAL
GLADJ
+
Vthc
-
Vthc
GLC
+
VSGF
-
VSGF
+
VSGT
-
VSGT
ParameterBlock
Jump voltage (forward)
Jump voltage (reverse)
Track cross voltage
Track cross voltage
Shock voltage mV
Shock voltage
+
-
+
-
Attenuation (TG1 ON)
Attenuation (TG1 OFF)
Attenuation (TG2 ON)
Attenuation (TG2 OFF)
Gain
Attenuation (SS OFF)
Output voltage "H"
Output voltage "L"
Output offset voltage
Slide voltage (forward)
Slide voltage (reverse)
Reset voltage
Output voltage
Max. gain (FE)
Min. gain (FE)
Max. gain (TE)
"JF" mode, VREF reference
"JR" mode, VREF reference
"Brake" mode, VREF reference
"Brake" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
Vi=50mVrms
Comparison with G
Vi=4.0V
Vi=1.0V
VREF reference
"SF" mode, VREF reference
"SR" mode, VREF reference
20
Pin
36
Pin , after RESET
Focus gain" mode CBA=111
"Focus gain" mode CBA=000
"Track gain" mode CBA=111
Test conditions
+0.10 +0.15 +0.20
+42.5 +62.5 +82.5
VSS
+0.65 +0.95 +1.25
Limits
Min. Typ. Max.
-0.20 -0.15 -0.10
-42.5 -62.5
+110 +140 +170
-170 -140 -110
10 20
—
02
10 20
—
02
10 12 14
—
60
3.5 4.0
—
1.0 1.5
-25 0
-1.25 -0.95
-0.65
2.1 2.3 2.5
3.5 4.5
3.5 5.5 7.5
-3.5 -1.5
19 21 23 dB
"Track gain" mode CBA=000
Max. balance (TE)
Min. balance (TE)
Phase difference voltage
-
Phase difference voltage
Phase difference voltage
-
Phase difference voltage
Balance voltage
Balance voltage
Phase detection exit low pass filter gain
+
-
Comparator level
Comparator level
Low pass filter gain
+
SGF output voltage
-
SGF output voltage
+
SGT output voltage
-
SGT output voltage
"Track balance" mode CBA=111
"Track balance" mode CBA=000
+
-
+
-
"Focus gain" mode phase difference (90+30)˚
"Focus gain" mode phase difference (90-30)˚
"Track gain" mode phase difference (90+30)˚
"Track gain" mode phase difference (90-30)˚
"Track balance" mode +0.5V offset
"Track balance" mode -0.5V offset
19
C (Pin )=680pF
+
-
VREF reference
VREF reference
27
C (Pin )=2.2nF
34
Pin , VREF reference
34
Pin , VREF reference
6
Pin , VREF reference
6
Pin , VREF reference
8.0 11.0 14.0 %
-12.8 -9.8 -6.8
3.1 3.3 3.5 V
-5 -3
—
—
-5 -3
0.6 0.7 0.8 V
-0.8 -0.7 -0.6 V
0.6
0.7
-0.8 -0.7 -0.6
82.5
—
—
—
—
+25
—
0.5 dB
3.5
1.9
-1 dB
-1
0.8
Unit
V
V
mV
mV
mV
dB
dB
dB
dB
dB
dB
V
V
mV
V
V
V
V
dB
dBMin. gain (TE) 12 1614
%
V3.1 3.3
V1.5 1.7
V1.5 1.7 1.9
V2.8 3.0 3.2
V1.8 2.0 2.2
mV0 +50
mV-50 0
dB
V
V
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MITSUBISHI SOUND PROCESSOR ICs
/
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONT ROLLER
FUNCTION DESCRIPTION
SettingBuilt-in Constant Current Source Current Value
The current value of Tracking Servo (TS) and Sledge Servo (SS)
constant current can be set with resistance value Rx connected
between pin and Vcc.
If the absolute values for TS and SS constant source current
values are assumed to be I (JF, JR) and I (SF, SR), respectively, they
are set as follows.
I (JF. JR) =
I (SF, SR) =
Where, V is the voltage of pin . If the voltage of pin (GND)
is assumed to be V , V can be found by the following formula.
V = V + VBE (VBE = 0.7V standard)
28
1
8
1
4
28
28 21
CURRENT
REFERENCE
28
CC-V
V
•
Rx
28
CC-V
V
•
Rx
2821
VCC
RX
28 29 14
V
BE
28
17
21
M62475FP
EQUIVALENT CIRCUIT
B
M62475FP
ZERO CROSS
A
35 31 30
FOCUS SEARCH
CIRCUIT
DETECTION
FZC OPE RATION TIMING CHARTCONSTANT CURRENT SOURCE BLOCK D IAGR AM
FOCUS SEARCH
OPERATION
tup
A
B
Vref
FSR+
V
Vref
VFSR-
VA
VB
SEARCH
VOLTAGE
tFSR
FOCUS SERVO ON
tdown
t
t
Vc
IJF I JR
FSR Detector
When the focus search is performed, the focus search direction is
automatically switched.
The focus search always starts from the side. The polarity (
-
direction) internal logic signal of the focus search voltage is
used for control and switching.
FZC detection is effective only in a direction.
+
ISF ISR
Setting FSR time tFSR (CFSR setting)
C
FSR
tFSR=
IFSR
+
CFSR:CFSR pin external capacitor
35
IFSR:Focus search current
At time of rising:110µA
At time of falling:60µA
FSR Vth± Voltage setting
Vth+:Vref+0.7V
Vth-:Vref-0.7V
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