ICs for Compact Disc/CD-ROM Player
1
AN8480NSB
3-phase full-wave motor driver IC
n Overview
The AN8480NSB is a 3-phase full-wave motor
driver IC with a reverse rotation brake/short brake
changeover function, incorporating a thermal pro-
tection circuit with its protection monitor pin.
n Features
• 3-phase full-wave and snubberless
• FG output
• Current limit
• Reverse rotation prevention
• Thermal protection circuit built-in (with thermal
protection monitor pin)
n Applications
• Various types of optical disk drive
n Block Diagram
Unit: mm
HSOP042-P-0400
17 814
(1.315)
0.65±0.20
28 22 21
(4.8)
(6.4)(1.2)
(5.15)
18.4±0.2
8.3±0.2
2.7±0.2
0.1±0.1
10.93±0.30
15
0.35
+0.10
–0.05
0.30
+0.10 –0.05
0.8 Seating plane
0 to 10
15
13 11201610
17
18
12
1
26
27
28
22
21
7
9
8
6
5
2
3
Hall
bias
Start/stop Thermal
protection
circuit
Absolute
value
Brake
circuit
Hall
amp.
matrix
Detection
Upper side
distribution
Lower side
distribution
Logic
Amp.
Amp.
Direction
detection
Direction
changeover
EA
ER
VTL
S/S
V
CC
PCI
BRK
TSDF
ECR
EC
VH
H3-
H3+
H2-
H2+
H1-
H1+
SG
EP = ER · EA
FG
comparator
VM
CS1
A1
A2
A3
PG
FG