KA9220C 1-Chip BlCMOS integrated circuit perform function (Servo Signa
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KA9220C
KA9220C 1-Chip BlCMOS integrated circuit perform function (Servo Signal Processor) Compact disc player applications. consists signal processing, focus servo, tracking servo, sled servo control, detecting automatic power control circuits.
1420C
FEATURES
Amplifier Focus Error Amplifer Tracking Error Amplifier Mirror Detector Focus etector Comparator Auto-Asymmetry control Amplifier Defect Detector improvement playability Built-in (Automatic power control) Amplifier (Focus, Tracking, sled, spindle servo control) Built-in Autosequencer Anti-shock function function preventing sled away Double speed operation available Operating supply Voltage range: 5.5V
ORDERING INFORMATION
Device KA9220C Package 80-QFP-1420C Operating Temperature -20°C~ +75°C
DVEE(S)
AVEE(S)
SSTOP TES
TRCNT
RESET
PFSET
TEST1
LOOP FILTER CMOS VREG &VIC CMOS COMPARATOR
MIRR COMPARATOR
TEST2 SLEO SLEI SLEN
EFMO
ISTAT
MDAT
AASC
DIRC
APDI
ISET
AVCC(S) TDFCT
VREGI
1-TIME 2-TIMES
TKEI
VREG LOCK SMPD SMON SMEF DVCC(S) SPDI SPDLO WDCH TESTD LDON
TRACKING PHASE COMPARATOR
TKEO AVCC(RF) TGSW
MICOM SERVO CONTROL AUTO SEQUENCER
WINDOWS COMPARATOR
DEFECT COMPARATOR
TRACKING ERROR
FOCUS COMPARATOR FOCUS PHASE COMPENSATION
FSCH FDFCT
FOCUS ERROR
FSEO
BLOCK DIAGRAM
DCC2
DCC1
AVEE(RF)
FBIAS
HFGD
KA9220C
Fig.
KA9220C
DESCRIPTION
Symbol AVEE TESTD TESTest1 PPSET Description Analog negative power supply input part Capacitor connection mirror hold. Capacitor connection defect bottom-hold Defect test Mirror test Input test Peak frequency setting focus, tracking compensation (cut frequency) LPF. SSTOP DlRC AVCC WDCH Check position pick-up whether inside not. Direct Track Jump Control Analog positive power supply input SERVO part. Auto-sequencer clock-input (Normal speed 88.2KHz, Double speed 176.4KHz) SMPD SMON TGSW Connection SMPD Connection SMON, spindle servo connection Providing time constant change high frequency tracking gain Capacitor connection switch tracking gain high frequency Capacitor connection perform rising bandwidth focus servo loop High frequency gain focus servo loop changed switch HFGD FSCH VREGl ISET
Reducing high frequency gain with capacitor connected between pini18 pin19 Time constant external generate focus search waveform External regulator voltage input Determing peak value focus search, track jump SLED kick
KA9220C
DESCRIPTION (CONTINUED)
System VREG SMEF MDAT RESET LOCK TRCNT ISTAT AVEE AASC EFMO SLEN SLEO SLEl TEST2 3.5V Regulator output connection Providing external time constant SERVO Loop connection Clock input from micom Latch input from micom Data input from micom Reset input from micom, reset operation sled runaway prevention function Track count output Internal status output Analog negative power supply input SERVO part connection connection Auto-Asymmetry control input comparator output Non-inverting input SLED SERVO amplifier Output SLED SERVO amplifier Inverting input SLED SERVO amplifer Test input change speed mode Normal speed "H", Double speed SPDl SPDLO Inverting input spindle servo amplifier Spindle servo amplifier output Inverting input focus servo amplifier. Description
KA9220C
DESCRIPTION (Continued)
System FSEO TKEl TKEO TDFCT DVCC FDFCT LDON FBlAS DVEE RFRV Output focus servo amplifer Non-inverting input tracking servo amplifier Output tracking servo amplifier connection Anti-shock input Tracking Zero Crossing input Tracking Error Servo input Output tracking Error Amplifer Capacitor Connection Defect Compensation tracking servo Digital positive power supply input servo part Focus error servo input Output focus error Amplifer Capacitor connection defect compensation focus servo Output Focus comparator. Laser diode ON/OFF control Feedback input amplifier Output Amplifier Bias non-inverting input focus error amplifier Digital negative power supply input servo part Output Signal summing amplifier inputed through capacitor Output summing amplifier Inverting input summing amplifier Output (AVCC AVEE)/2 Voltage Bias input Center Voltage buffer Description
KA9220C
DESCRIPTION (CONTINUED)
System AVEE DCC2 DCC1 Output amplifier Input amplifier Analog positive power supply input part connection Inverting input AMP2 Inverting input AMP1 Inverting input Inverting input Selecting sub/N Laser diode Defect bottom hold output inputed through capacitor Output defect bottom hold Description
KA9220C
ABSOLUTE MAXIMUM RATINGS 25°C)
Characteristic Supply Voltage Power Dissipation Operating Temperature StorageTemperature Symbol VMAX Value +150
Unit
ELECTRICAL CHARACTERISTICS
25°C, AVCC DVCC +2.5V, AVEE DVEE -2.5V, Unless Otherwise Specified) Input
Characteristic Supply Current Output Offset Voltage Voltage Gain Maximum Output Amplitude Maximum Output Amplitude Output Offset Voltage Voltage Gain Voltage Gain FOCUS ERROR Gain Difference Maximum Output Amplitude Maximum Output Amplitued
Symbol V001 (MAX)
Test Conditions
Output
28.1
Unit 31.1
Pin66 1KHz, 40mV Sinewave 0.2VDC Output: Peak Voltage -0.2VDC Output: Peak Voltage Pin74 Pin74 Pin66 Pin66
25.1
(MAX)
Pin74
Pin66
-0.3
V002 1KHz, 40mV Sinewave Pin74
Pin57 Pin57 Pin57
27.0 27.0 30.0 30.0
33.0 33.0
VOH(MAX) VOL(MAX)
0.2VDC Output: Peak Voltage 0.2VDC Output: Peac Voltage
Pin74 Pin74
Pin57 Pin57
-1.9
KA9220C
ELECTRICAL CHARACTERISTICS (CONTINUED)
Characteristic Output Offset Voltage Voltage Gain TRACK Voltage -ING Gain Gain difference Maximum ERROR Output Amplitude Maximum Output Amplitude Output Voltage Output Voltage Output Voltage Output Voltage Output Voltage Output Voltage Maximum Output Amplitude Maximum Output Amplitude Symbol VOO3 VOH(MAX) 0.2VDC Output: Peak Voltage 0.2VDC Output: Peak Voltage 190mV 90mV 100mV 170mV Pin76 Pin53 1KHz, 0.3V Sinewave Pin76 Pin77 Test Conditions Input Output Pin53 Pin53 Pin53
10.0 10.0
13.0 13.0
Unit
VOL(MAX)
Pin76
Pin53
-1.9
VOH(MAX)
Pin71 Pin71 Pin71 Pin71 Pin71 Pin71
Pin70 Pin70 Pin70 Pin70 Pin70 Pin70 Pin70
-1.0 -1.0 -1.0
0.8mA -0.8mA
Pin70
VOL(MAX)
Pin70
Pin70
KA9220C
ELECTRICAL CHARACTERISTICS (CONTINUED)
Characteristic Threshold Voltage High Output Voltage Output Voltage High Output Voltage Output Voltage MIRROR Bottum hold frequency operation frequency High Output Voltage Output Voltage DEFECT Minimum input Operating Frequency Maximum input Operating Frequency Duty Cycle Duty Cycle Symbol VTHI (FOX) (FOK) (MIR) (MIR) FRES (MAX) (DEF) (DEF) (MIN) 1KHz, 15mVDC Sinewave 1KHz, 15mVDC Sinewave 750KHz, 0VDC 0.7V Sinewave 750KHz, 0.25VDC Sinewave 0.1VDC 0.5VDC -0.5VDC 0.5VDC 900KHz, -0.4mVDC 0.8V Sinewave 30KHz, 0.4mVDC 0.8V Sinewave 1KHz, 15mVDC 32mV Sinewave 10KHz, 0.4mVDC 0.8V Sinewave 45KHz, -375mVDC Sinewave Test Conditions Input Pin65 Pin65 Pin65 Pin65 Pin65 Pin65 Pin65 Pin74 Pin74 Pin74 Output Pin59 Pin59 Pin59 Pin5 Pin5 Pin5 Pin5 Pin4 Pin4 Pin4
-430
-380
-330
Unit
-1.8 -2.2 -2.2 1000
f1(MAX)
Pin74
Pin4
(DC) (FCS) (FCS) (FCS)
Pin56 Pin56 Pin56 Pin56 Pin56 Pin56
Pin37 Pin37 Pin46 Pin46 Pin46 Pin46
19.0 1.98
21.5
24.0
Voltage Gain Output FOCUS Voltage SERVO Output Voltage Output Voltage
-1.98 1.18
KA9220C
ELECTRICAL CHARACTERISTICS (CONTINUED)
Characteristic FOCUS Output SERVO Voltage Search Output Voltage Search Output Voltage Gain Gain Voltage Gain Output Voltage Output Voltage Output TRACK Voltage -ING Output SERVO Voltage Jump Output Voltage Jump Output Voltage Gain Gain Voltage Gain SLED Output SERVO Voltage Output Voltage Output Voltage Symbol (FCS) VO(SEARCH) VO(SEARCH) (AC) (AC) (DC) (TCK) (TCK) (TCK) VO(TCK) (JUMP) (JUMP) (AC) (AC) (DC) O(SLD) (SLD) (SLD) 1.2KHz, 100mVP-P Sinewave 2.7KHz, 100mV Sinewave 0.1VDC 0.4VDC -0.4VDC 0.4VDC Pin52 Pin52 Pin39 Pin39 Pin39 Pin39 Test Conditions -0.5VDC Data Data 1.2KHz, 100mVP-P Sinewave, 1.2KHz, 100mVP-P Sinewave, -0.2VDC -1.5VDC 1.5VDC -1.5VDC 1.5VDC Input Pin56 Pin56 Pin56 Pin56 Pin56 Pin65 Pin52 Pin52 Pin74 Pin74 Output Pin46 Pin46 Pin46 Pin46 Pin46 Pin48 Pin48 Pin48 Pin48 Pin48 Pin48 Pin48 Pin48 Pin48 Pin40 Pin40 Pin40 Pin40
-1.18
Unit
-0.63 -0.50 0.38 19.0 14.0 13.5 1.98 0.50 23.0 18.5 15.5
-0.38 0.63 27.0 23.0 17.5
-1.98 1.18 -1.18 -0.63 -0.50 0.38 17.5 21.0 1.98 -1.98 1.18 0.50 12.5 21.5 23.0 -0.38 0.63 16.0 25.5 25.0
KA9220C
ELECTRICAL CHARACTERISTICS (CONTINUED)
Characteristic Output Voltage Kick Output Voltage Kick Output Voltage Voltage Gain Output Voltage Output Voltage Output Voltage Output Voltage Regulator Output Voltage Maximum Output Amplitude Maximum Output Amplitude Maximum Output Amplitude Maximum Output Amplitude Maximum Output Amplitude Maximum Output Amplitude Output Voltage Symbol VO(SLD) VO(KICK) VO(KICK) (DC) VO(SPD) VO(SPD) VO(SPD) VO(SPD) VREG (MAX) 0.2VDC Output: Peak Voltage 0.2VDC Output: Peac Voltage 0.2VDC Output: Peak Voltage 0.2VDC Output: Peak Voltage 0.2VDC Output: Peak Voltage 0.2VDC Output: Peac Voltage 190mV 0.2VDC 1.0VDC -1.0VDC 1.0VDC -1.0VDC Pin12 Pin12 Pin12 Pin12 Pin12 Pin74 Pin74 Pin66 Test Conditions 0.4VDC Input Pin39 Output Pin40 Pin40 Pin40 Pin44 Pin44 Pin44 Pin44 Pin44
-1.18
Unit
SLED SERVO
0.45 -0.73 14.0 1.78
0.59 -0.59 16.0
0.73 -0.45 18.0
SPINDLE SERVO
-1.78 1.13 -1.13 3.30 3.47 3.65
(MAX)
Pin74
Pin66
-0.3
(MAX)
Pin74
Pin57
FOCUS ERROR TRACK -ING ERROR
(MAX)
Pin74
Pin57
-1.1
VOH(MAX)
Pin74
Pin53
(MAX)
Pin76
Pin53
-1.1
Pin71
Pin70
KA9220C
ELECTRICAL CHARACTERISTICS (CONTINUED)
Characteristic Output Voltage Output Voltage Output Voltage Output Voltage Output Voltage Threshold Voltage Output Voltage High Output Voltage Output Voltage High Output MIRROR Voltage High Output DEFECT Voltage Output Voltage Duty Cycle Duty Cycle Output Voltage Output FOCUS Voltage SERVO Search Output Voltage Search Output Voltage Symbol VTH2 (FOK) (FOK) (MIR) (MIR) (DEF) (DEF) (fcs) (fcs) (SEARC)3 (SEARC)4 1KHz, 15mVDC Sinewave 750KHz, 0VDC 0.7V Sinewave 750KHz, 0.25VDC Sinewave 0.5VDC -0.5VDC 10KHz, 0.4VDC 0.8V Sinewave 45KHz, 375mVDC Sinewave Test Conditions 90mV 100mV 170mV Input Pin71 Pin71 Pin71 Pin71 Pin71 Pin65 Pin65 Pin65 Pin65 Pin65 Pin74 Pin74 Pin65 Pin65 Pin56 Pin56 Output Pin70 Pin70 Pin70 Pin70 Pin70 Pin59 Pin59 Pin59 Pin5 Pin5 Pin4 Pin4 Pin37 Pin37 Pin46 Pin46 Pin46 Pin46
-0.2
Unit
-0.2 -430 -1.0 -1.2 -1.2 1.18 -1.18 -0.63 0.38 -0.50 0.50 -0.38 0.63 -380 -330
KA9220C
ELECTRICAL CHARAC TERISTICS (CONTINUED)
Characteristic Output Voltage Output TRACK Voltage -ING Jump Output SERVO Voltage Jump Output Voltage Output Voltage Output SLED Voltage SERVO Kick Output Voltage Kick Output Voltage Output SPINDLE Voltage SERVO Output Voltage Symbol (Tck) (Tck) (JUMP) (JUMP) (SLD) (SLD) (KICK) (KICK) (SPD) (SPD) 1.0VDC -1.0VDC Pin12 Pin12 0.4VDC -0.4VDC Pin39 Pin39 Test Conditions -1.5VDC Input Pin52 Pin52 Output Pin48 Pin48 Pin48 Pin48 Pin40 Pin40 Pin40 Pin40 Pin44 Pin44
1.18
Unit
-1.18 -0.63 0.38 1.18 -1.18 0.40 -0.68 0.98 -0.98 0.54 -0.64 0.68 -0.40 -0.50 0.50 -0.38 0.63
VEE(-2.5V)
VCC(2.5V)
SG59
SG56
SG52
SG51
SG50
0.14K
0.14K
180pF
0.14K
0.14K 100K 200K 200K 100K 100K
470K
SG65
470K
SG39
0.01uF
KA9220C
390K
SG74 390K SG77
SG31
SG30
3300pF
SG29 SG28
240K
2.7K
SG27
510K 3300pF 1000pF
SG12
TEST CIRCUIT
SG11
22uF
KA9220C
KA9220C
DESCRIPTION FUNCTION
BLOCK
Description
KA9220C designed 3-spot type optical pick-up assembly. photo detector composed light sensor through photo detector detect audio modulation signal disc generate focus error signal. photo detectors generate tracking error signal. AMPLIFIER
SUMMING
iPD1
AMP(1)
Photo Detector iPD2
AMP(2)
converted current through Kohm Internal resistor into Voltage. Furthermore, they added Summing amplifier. This signal outputted from (Pin66). output Voltage follow. VRFO (iPD1 +iPD2)
KA9220C
TRACKING ERROR AMPLIFIER
PITS 260K
(A+B+C+D) PHOTO DETECTOR
12pF
Tracking Error
12pF
260K
output photo detector directed Input VAMP photo detector directed input AMP. These input signals current. converted into voltage from current signal. When correct tracking, input (VF, signals equal. occurence tracking error difference between output output. 260K 273K 403K 260K 260K) accordingly, VTE1 1290K
KA9220C
FOCUS ERROR AMPLIFIER
25pF
174K (A+C) (B+D)
25pF 161K
FBIAS
focus error difference between output output This signals each applied input focus error amp. result differential voltage, Focus error signal appeared (Pin57). This Output Voltage (low frequency) becomes follow VFE1 R1/R3 focus error voltage directed focus servo Block, maintain optimum focusing times.
FOCUS GENERATION CIRCUIT
from summing
FOCUS
FOCUS Comparator
from level shifter
KA9220C
focus circuit generates timing window monitor focus search status focus servo. When (Pin Voltage more than 0.37V, focus circuit inverted. Time constant comparator mirror circuit that focus circuit determined Capacitor (0.01µF) between RFO.
MIRROR CIRCUIT
2.5K
2.5K
1.5K
Peak Bottom hold
23PF
TES
After input signal amplified Mirror amp, held Bottom Peak hold circuit. Such hold determined time constant. Envelope signal (demodulated two-thirds peak value this signal time constant signal held when larger than that signal. Therefore, mirror output track disc, High between tracks disc, High when detect detected.
KA9220C
DEFECT CIRCUIT
DCC1 Defect
0.033
DCC2
37.5K BIAS
Defect Bottom Hold
Defect Bottom hold Defect Comparator TESTD
bottom hold time constant long short, after than signal inverted. short time constant bottom hold generated shorter than 0.1m disc mirror defect,and long time constant generated previous mirror level. Mirror defect detection signals generated diffenentiation Capacitor Coupling,and then transfer level.
KA9220C
COMPARATOR
Comparator 3.2PF
Auto Asymmetry Control Auto Asymmetry Butter
EFMO
100K
AASC
100K
8.5K
Comparator converts Signal into binary signal. processing disc production occured disproportion because modification disc. That reduced only coupling. reference voltage comparator controlled utilizing fact that generation-probability (duty) binary signal.
KA9220C
(AUTOMATIC POWER CONTROL) CIRCUIT Single Power Supply P-sub Laser
300K 0.75K
150K 150K
150K
Single Powdr Supply N-sub Laser
300K 0.75K
150K 150K
150K
Laser diode large negative temperature chararteristic when does something regularly supply current laser diode. Therefore, output processing monitor photo diode must controlled current getting regularly output power. This circuit composed single powersupply operation. This circuit p-sub N-sub laser diode according application circult.
KA9220C
SERVO BLOCK
FOCUS SERVO BLOCK
3.6K
470K 0.1uF 0.1uF FDFCT HFGD
PHASE COMPENSATION FSEO 100K DFCT 130K 470K 240K VREG 5.5u ISET FOCUS COIL
560K
PFSET
FSCH
0.1uF
510K
0.1uF
4.7uF
When defect signal detected, focus servo Loop isolated. this time, focus servo error output outputed through pass filter formed connecting capacitor (0.1µF) between built-in 470K resistor FDFCT (Pin58). Accordingly, focus error output held just before error value during defect. peak frequency focus phase compensation about 1.2KHz when resistor connected PFSET (Pin7) 510K. inversely proportional resistor connected While focus search operating, switch then Focus error signal isolated, accordingly outputed FSEO (Pin48). When switch focus servo Loop then focus error outputed through focus servo Loop.
KA9220C
TRACKING SLED SERVO LOOP
0.022UF
100K 100K 100K SSTOP SSTOP
0.047UF
SLEO SLEI 120K 8.2K SLEN 3.3UF
SLED DRIVER
0.1UF TDFCT DFCT 470K
100K
680K 66PF PHASE COMPENSATION
5.5U
5.5U
0.033UF
TGSW 470K
PFSET 510K
capacitor across (Pin16) TGSW (Pin15) reduces high frequency gain when switch OFF. Peak frequency tracking phase compensation about 1.2KHz when resistor connected PFSET (Pin7) 510K. inversely proportional resistor connected tracking error signal switched into pass filter route formed connecting capacitor between built resistor DFCT (470K) Pin54 (TDFCT) tracking error signal.
110K
TKEI TKEO
100K
TRACKING COIL
KA9220C
SPINDLE SERVO PASS FILTER
20.5K SMON
220K 100K
SMPD 220K 220K
SMDS SMEF 0.47UF
SMEF
PFSET 510K
0.033UF
0.033nF connected Pin25 (SMEF) form 200Hz Pass filter. carrier component spindle servo error signals eliminated. mode, SMEF becomes Pin25 lowers, strengthening filter further.
SPDI
SPDLO
SPINDLE DRIVER
100K
KA9220C
COMMANDS
Serial interface timing chart
MDATA
tWCK
1/fck
Item Clock frequency Clock pulse width Hold time Setup time Delay time Latch pulse width
Symbol fwck
Min.
Typ.
Max.
Unit
1000
KA9220C
HEXA COMMANDS This command controls focus servo Loop.
Pin20 charged (11µA 5.5µA) 0.275V. Pin46 Voltage level follow, (11µA 5.5µA) feed back resistor focus search voltage produced
SWITCH $00- Focus servo $08- Focus servo
KA9220C
$1X. This command controls tracking servo Loop GaIn Break circuIt Anti Shock ON/OFF Break Circuit ON/OFF
$2X. Tracking control SERVO Jump Jump TM1, TM3, SLED Control SERVO Kick Kick TM2, TM5,
4.S3X. SLED Normal Kick Focus Search Peak Focus Search (PS3) auto sequencer commands. (PS2) SLED Kick Peak (PS1) (PS0) Relative value
KA9220C
Other DIRC
latch DIRC JUMP JUMP latch
TRACKING SERVO SLED SERVO
LOCK (Sled runaway prevention circuit)
LOCK
SLED SERVO TG1,
TRACKING GAIN DOWN
DEFECT (Disc defect countermeasure circuit)
DEFECT FOCUS SERVO TRACKING SERVO
KA9220C
System Control ITEM HEXA ADDRESS FOCUS CONTROL TRACKING CONTROL TRACKING MODE SELECT FOCUS SEARCH AUTO SEQUENCE BLIND OVER FLOW BREAK KICK TRACK JUMP TRACK JUMP NORMAL SPEED DOUBLE SPEED 0.36ms 11.6ms 0.18ms 5.8ms 0.09ms 2.90ms 0.18ms FOCUS ANTI SHOCK TRACKING MODE FOCUS SEARCH 0.09ms SLED KICK 0.045ms BREAK GAIN DATA
ISTAT SEARCH GAIN STOP
GAIN DOWN SEARCH
SLED MODE SLED KICK 0.022ms 0.045ms 1.455ms
KA9220C
Serial data truth table Focus control
SERIAL DATA FOCUS CONTROL
HEXA
SWITH
KA9220C
Tracking Gain control SERIAL DATA TRACKING CONTROL HEXA SWITH
KA9220C
Tracking mode control
SERIAL DATA TRACKING MODE
HEXA DIRC
Function DIRC DIRC
KA9220C
Auto Sequence CANCEL FOCUS TRACK JUMP TRACK JUMP TRACK JUMP TRACK MOVE
forward reverse
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