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IC401 (BA6664FM) : Spindle Motor Drive IC
It drives the spindle motor receiving the spindle control signal at IC701 (CXD3030R) in CD & DVD
mode.
Block Diagram
•
Pin Description
Pin No.
Pin Name
1
N.C.
A
2
3
N.C.
3
A
4
2
5
N.C.
6
N.C.
7
A
1
GND
8
H
+
9
1
H
-
10
1
11
H
+
2
12
H
-
2
13
H
+
3
H
14
-
3
V
15
H
BR
16
17
C
NF
18
SB
19
FG
2
20
FR
E
21
CR
E
22
C
PS
23
24
FG
25
Vcc1
26
GSN
V
27
M1
R
28
NF
FIN
FIN
DRIVER
GAIN
A3
CONTROL
2
A2
4
TL
A1
7
HALL AMP
+
GND
-
8
H1+
+
9
-
Hall 1
H1-
+
-
10
H2 +
+
11
-
Hall 2
H2 -
+
-
12
H3 +
+
13
-
Hall 3
H3 -
14
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
R
NF
28
R
VM
TSD
27
GSW
GAIN
26
SWITCH
VCC
CURRENT
VCC
25
+
SENSE AMP
-
FG
24
PS
P S
23
TORQUE
EC
SENSE AMP
22
+
-
ECR
21
VCC
FR
VCC
20
FG2
R
19
Q
D
CK Q
SB
18
SHORT BRAKE
CNF
17
BR
BRAKE MODE
16
VH
Hall Bias
15
FIN
NF
V
M
Vcc
SERVO
SIGNAL
35
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