38
IC602 (BA6849) : Spindle Motor Drive IC
It drives the spindle motor receiving the spindle control signal at IC301 (TC9420) in CD mode and
IC401 (TC90A19) in DVD mode.
28
27
26
25
24
23
22
21
20
17
15
18
2
4
7
8
9
10
11
12
13
14
SHORT BRAKE
SB
A3
A2
A1
GND
H1+
H1-
Hall 1
H2+
H2-
H3+
H3-
DRIVER
TSD
TL
P S
V
CC
V
CC
CURRENT
SENSE AMP
TORQUE
SENSE AMP
Hall Bias
HALL
AMP
GAIN
CONTROL
R
Q
Q
CK
VH
FIN
CNF
FR
ECR
EC
PS
SERVO
SIGNAL
FG
VM2
VM1
RNF
VCC1
Vcc1
R
NF
V
M
D
Hall 2
Hall 3
Pin No.
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
FIN
Description
N.C.
Output3 for motor
N.C.
Output2 for motor
N.C.
N.C.
Output1 for motor
GND
Hall input Amp1. positive input
Hall input Amp1. negative input
Hall input Amp2. positive input
Hall input Amp2. negative input
Hall input Amp3. positive input
Hall input Amp3. negative input
Hall Bias
N.C.
Capacitor connection pin for phase compensation
Short brake terminal
N.C.
Rotation detect terminal
Torque control standard voltage input terminal
Torque control voltage input terminal
START/STOP Switching
FG signal output terminal
5V Power supply for signal division
12V Power supply for signal division
Power supply for driver
Power supply for driver division
GND
Pin Name
N.C.
A
3
N.C.
A
2
N.C.
N.C.
A
1
GND
H
1
+
H
1
-
H
2
+
H
2
-
H
3
+
H
3
-
V
H
N.C.
C
NF
SB
N.C.
FR
E
CR
E
C
PS
FG
Vcc1
V
M2
V
M1
R
NF
FIN
Block Diagram
Pin Description