ICs for Compact Disc/CD-ROM Player
AN8473SA
Spindle motor driver IC for optical disk
s
Overview
The AN8473SA is an optical disk driver IC,
featuring direct PWM drive, DMOS power drive,
low ON resistance of output power MOS and 120°
of duty-factor.
32
11.0±0.3
17
Unit: mm
6.1±0.3
s
Features
•
R
ON
=
0.5
Ω
(for both upper and lower)
•
5 V single power source
•
Circuit current 7 mA (including step-up circuit
current)
0.65±0.10
8.1±0.3
1
16
0.2
–0.05
1.5±0.2
+0.10
(0.625)
0.65
0.3
–0.05
+0.10
s
Applications
•
Optical disk
Seating plane
0.65±0.10
0.1±0.1
(0.5)
SSOP032-P-0300
V
DD
16
14
13
Start 11
FG 10
H1H 7
H1L 6
H2H 5
H2L 4
H3H 3
H3L 2
VH 1
EC 8
ECR 9
PWMSW 30
Start/
stop
Step-up
voltage
circuit
OSC
Thermal
protection
12
VPUMP
s
Block Diagram
BC2
BC1
17
18
32
31
VM21
VM22
VM11
VM12
A11
A12
A21
A22
A31
A32
PG2
PG1
CS
GND
Amp.
Hall amp.
matrix
Distributor
circuit
PWMOUTU
Amp.
PWMOUTL
FF
Absolute
value
PWM
frequency
changeover
circuit
V
T
SRESET
SSET
V
C1
×
5
Output
circuit
27
28
24
25
21
22
23
26
19
15
Hall
bias
1