ICs for Compact Disc/CD-ROM Player
1
AN8470NSA
Spindle motor driver IC for optical disk
n Overview
The AN8470NSA is a high performance IC
suited for driving a spindle motor of an optical disk
such as CD-ROM, PD, DVD, CD-R, CD-RW, etc.
n Features
• Low power consumption due to a direct PWM
system
• With start and stop pin
• Reverse breaking by EC/ECR voltage
• With Hall bias pin
• Surface-mount small package
n Applications
• High speed CD-ROM drive
PD, DVD, CD-R, CD-RW drives
n Block Diagram
Unit: mm
SSOP032-P-0300
116
(0.5)
(0.625)
32
11.0±0.3
6.1±0.3
0.65±0.10
0.65±0.10
0.1±0.1
1.5±0.2
8.1±0.3
17
0.65
0.3
+0.10
–0.05
0.2
+0.10
–0.05
Seating plane
7
Start Start/stop
24
FG
23
H1H
32
VM2
3
A1
1
A2
31
A3
2
RNF2
30
RNF1
10
GND
· 5
22
H1L
21
H2H
19
H2L
18
H3H
FF
17
H3L
8
VH
27
EC
26
ECR
25
FC
V
DD
9
BC4
11
BC3
12
BC1
14
BC2
13
VPUMP
15
VM1
6
Step-up voltage circuit
Thermal
protection
OSC
Amp.
Amp.
PWMOUT
PNFOUT
SRESET
V
CL
V
T
Hall amp.
matrix
Hall
bias
Oscillator
Distributor
circuit
Output
circuit
SSET