an8472sa Panasonic Corporation of North America, an8472sa Datasheet - Page 2

• Manufacturer Part Number: an8472sa
• Description: Spindle Motor Driver Ic For Optical Disk
• Manufacturer: Panasonic Corporation of North America

AN8472SA
2
Pin No.
Block Diagram
Pin Descriptions
10
11
12
1
2
3
4
5
6
7
8
9
VPUMP
Symbol
H3H
H2H
H1H
ECR
Start
H3L
H2L
H1L
VH
FG
EC
H1H
H2H
H3H
ECR
Start
H1L
H2L
H3L
VH
FG
EC
FC
Hall bias pin
Hall element-3 negative input pin
Hall element-3 positive input pin
Hall element-2 negative input pin
Hall element-2 positive input pin
Hall element-1 negative input pin
Hall element-1 positive input pin
Torque command input pin
Torque command reference input pin
FG signal output pin
Start/stop changeover pin
Booster pin
11
10
7
6
5
4
3
2
1
8
9
32
Hall amp.
Oscillator
Start/stop
Description
matrix
Hall
bias
V
T
Step-up voltage circuit
SSET
OSC
Distributor
circuit
FF
SRESET
protection
Thermal
Pin No.
RNFOUT
ICs for Compact Disc/CD-ROM Player
13
14
15
16
17
18
19
20
21
22
23
24
Amp.
Amp.
PWMOUT
Symbol
V
RNF2
GND
VM2
N.C.
BC1
BC2
BC3
BC4
V
A31
A32
A21
C1
5
DD
Output
circuit
Booster capacitor connection pin 1
Booster capacitor connection pin 2
Booster capacitor connection pin 3
Booster capacitor connection pin 4
Ground pin
Supply voltage pin
Motor supply voltage pin 2
N.C.
Drive output 3
Drive output 3
Current det. pin 2
Drive output 2
19
27
28
24
25
21
22
23
26
17
Description
VM2
A11
A12
A21
A22
A31
A32
RNF2
RNF1
GND