LG DRD-820B Manual page 33

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.
Block Diagram
Pin Description
Pin Name
Pin No.
N.C.
1
A
2
3
N.C.
3
A
4
2
N.C.
5
N.C.
6
A
7
1
GND
8
9 H +
1
H -
10
1
H
11 +
2
H -
12
2
H +
13
3
H -
14
3
V
15
H
N.C.
16
C
17
NF
SB
18
N.C.
19
FR
20
E
21
CR
22 E
C
PS
23
FG
24
Vcc1
25
V
26
M2
V
27
M1
R
28
NF
FIN
FIN
38
SB
SHORT BRAKE
18
DRIVER
A3
2
GAIN
A2
CONTROL
4
A1
TL
7
GND
8
HALL
AMP
H1+
9
Hall 1
H1-
10
H2+
11 R
D
Q
Hall 2
CK Q
H2-
12
H3+
13
Hall 3
H3-
14
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
RNF
R
NF
28
VM1
27
TSD
CURRENT
VM2
26
SENSE AMP
VCC1
V
V
CC
25
Vcc1
FG
24
PS
23
P S
TORQUE
EC
SENSE AMP
22
ECR
21
V
CC
FR
20
CNF
17
VH
15
Hall Bias
FIN
Description
M
SERVO
SIGNAL