35
IC401 (BA6664FM) : Spindle Motor Drive IC
It drives the spindle motor receiving the spindle control signal at IC701 (CXD3030R) in CD & DVD
mode.
2
4
7
8
9
10
28
27
26
25
24
23
22
21
20
19
18
17
16
15
11
12
13
14
TL
TSD
GAIN
CONTROL
Hall 1
Hall 2
Hall 3
Hall Bias
BRAKE MODE
HALL AMP
SHORT BRAKE
P S
A3
A2
A1
H1+
H1-
H2 +
H2 -
H3 +
H3 -
FIN
GND
R
NF
R
NF
VM
GSW
VCC
FG
V
M
PS
EC
ECR
FR
FG2
SB
CNF
BR
VH
+
-
+
-
+
-
+
+
-
-
+
-
+
-
TORQUE
SENSE AMP
SERVO
SIGNAL
CURRENT
SENSE AMP
VCC
VCC
Vcc
VCC
D
CK Q
Q
R
DRIVER
GAIN
SWITCH
+
-
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
Change for BRAKE MODE
Capacitor connection pin for phase compensation
Short brake terminal
3 phase synthesized FG signal output terminal
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
Gain Switch
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
BR
C
NF
SB
FG
2
FR
E
CR
E
C
PS
FG
Vcc1
GSN
V
M1
R
NF
FIN
Block Diagram
•
Pin Description