Document
IC
CD
BA5977FP
BA5977FP
CD 1
4ch BTL
BA5977FP
LSI PWM
4ch BTL
! CD/MD CD-ROM
! 1) 4ch BTL 2) HSOP28 3) 3ch PWM 4) ch4 SW 5) 6) 7) 8)
1 PreVCC=8V, PowVCC=8V, RL=8Ω , 5.4V Typ.
! Ta=25°C
!
IC
!
28 27
Pre Vcc
26 25 24 23 22
10k 50k
100k
PIN3
F
R
INTERFACE
100k
R F
THERMAL SHUTDOWN
INTERFACE FR
SW
F
RF
INTERFACE
FR
R
12
345
67
BA5977FP
21 20 19 18 17
MUTE Vref
50k
50k Pow Vcc
Ch3,4
Pow Vcc
19k
10k
50k 6.5k
50k PIN26
16 15
LEVEL SHIFT
Pow Vcc Ch1, 2
8 9 10 11 12 13 14
IC
!
BA5977FP
IC
!
ch1 3 4,6,23pin
17k
10k 20k
10k
11 18pin
20pin
50k 50k
BA5977FP
ch1 3 5,7,22pin
17k
7.3k
50k 9pin
50k
3pin
50k 50k
1pin 2pin
24pin 100k
100k
100k
25pin
10k 100k
27pin
50k 50k
26pin
BA5977FP
IC
! Ta=25°C, VCC=8V, RL=8Ω, Vb=VOP+=1.75V
Parameter
Symbol Min. Typ. Max. Unit
Conditions
IQ
17.0 25.0
mA
Vref
VREF 3.70 4.00 4.30
V
VMOFF 2.0
V
VMON
0.5 V
< ch1 2 3 >
H
VIH 2.4
VCC V
L
VIL 0.3
0.5 V
H
IIH 170 310 450
A Vf Vr 5V
L
F IILF
10
0 A Vf 0V
L
R IILR
50
0 A Vf 0V
VOO
30
30 mV
VOM 4.4 5.0 5.6
V
< ch4 >
IB 10 300 nA
VOO4
50
50 mV Vb VIN4
VOM 4.8 5.4
V Vb 4V
GVC
9.3 11.3 13.3 dB
< SW 3pin >
H VIHSW 2.0 VCC V
L VILSW 0.3 0.5 V
H
IIHSW
60 90
A VSW 3.5V
L
IILSW
10
0
10
A VSW 0V
<>
VOFOP
5
0
5 mV
IBOP
10 300 nA
H VOHOP 7.0
V Vb 4V
L VOLOP
0.2 V Vb 4V
Isink 2.0 9.0
mA
Isource 7.0
13.0
mA
GVO 65 dB VIN 60dBV 1kHz
SR
0.5
V / s f 50kHz 2VP-P
Vb 4V
21 20 19 18 17 16 15
IC
!
V VO V
RL RL
V VO V
RL RL
A
Pow A Vcc VM IM
50k Pow
50k
Vcc ch3, 4
19k
10k
Pow Vcc
LEVEL SHIFT
50k 50k
6.5k pin26
Pow Vcc ch1, 2
9
10 11 12 13 14
BA5977FP
RL RL
V VO V
RL RL
V VO V
V Vref
8
MUTE Vref
RR
12 34 56 7
RF
100k F
R
FR
26 25 24 23 22
A Ir Vr
VIN4
A If Vf
A IIN4 SW1
Vb
a
b SW2 1M V Vb4
A
Ipre Pre Vcc
OP1
V Voop IL
28 27 Pre Vcc
10k
50k
100k
pin3
INTER-
FACE
THERMAL SHUTDOWN
a b OP2 c d
470 F
10k 1M
V Vbop 100k
Fig.
F
INTERFACE FR
INTER-
SW
FACE
F
A Vf Ir
A Vf If
A Vf Ir
A Vf If
A Vsw Isw
1k Vop
Vofop V
OP4
10 F
PreVCC
10k a b
OP3 c
IC
!
BA5977FP
! (1) ch1∼3
IC
I1 BUF1
C1 25pF
F INTER
FACE R
SW1 SW2
A R1 100k
OUT1 OUT2
BUF2 I2
Fig.2
5V FR
0V
RF 0V
Fig.3
BA5977FP
1V
Fig.4
OUT2 1 OUT1 2
IC
Fig.4
I1 RC
I1×R1!2.5V Vref
Fig.3 SW2 ON
Fig.2 DUTY
"H" -2.5V 5V
R×C=2.5µs
Fig.2
I1 I2 25µA Typ.
H 2.4V BUF1 BUF2 BTL
A DC
SW1
IC
(2) ch4
BTL RC
pin25
Vref Vref VCC/2
ch4
BA5977FP
26pin
Vref
SW
pin3 "H"
"L"
R1 C1 Vref
100k
24
25
C2
10k
26
Vref
Fig.5
50k
3
100k
(3) 20pin "L" 0.5V
FOCUS ERROR
OUT
TRACKING ERROR OUT
BIAS 1.75V
DIGITAL SERVO
Fig.
SLED OUT
SPINDLE OUT
REVERSE FORWARD
FORWARD REVERSE FORWARD REVERSE
MUTE
82k
15k
H = ON L = OFF
3000pF
0.47 F 0.1 F
28 27
Pre Vcc
26 25 24 23 22
50k
10k
100k F
R
pin3
INTER-
R
FACE
100k
F
INTERFACE
F
F RR
F
INTERFACE SW F R R
12
34
56
7
21 20 19 18 17
MUTE Vref
50k
Pow
50k
Vcc ch3, 4
10k
Pow Vcc
50k
50k
19k
6.5k pin26
16 15
LEVEL SHIFT
Pow Vcc ch1, 2
8 9 10 11 12 13 14
BA5977FP
TRACKING COIL
FOCUS COIL
0.1 F
IC
!
SPINDLE MOTOR
SLED MOTOR
0.1 F
IC
! (1) BA5977FP
180°C Typ. (2)
(3) (4) FIN
IC
GND
ON 0.1µF
!
4ch GND
BA5977FP
R(F) F(R)
IC
PreVCC 8V
1.75V
VO Isource
1.75V
Isink
BA5977FP
! Unit : mm
18.5 0.2 28
15
9.9 0.3 7.5 0.2
0.25 0.1
2.2 0.1 0.11
1
5.15 0.1
14
0.8
0.35 0.1
0.3Min.
0.15
HSOP28
.