Panasonic AN8472SA Datasheet
ICs for Compact Disc/CD-ROM Player
AN8472SA
Spindle motor driver IC for optical disk
■ Overview
The AN8472SA is a high performance IC suited
for driving a spindle motor of an optical disk such
as CD-ROM, DVD etc. Small outline package can
be used due to reduced power consumption by adopting the direct PWM drive system.
32
■ Features
• 3-phase full-wave 120° duty factor system
• Low power consumption due to a direct PWM
system
• D-MOS transistor with low ON resistance (0.6 Ω
typ.) on the output stage
• With start and stop pins
• Thermal shut-down function built-in
• With FG output pin
• Reverse breaking by EC/ECR voltage
• With Hall bias pin
• Surface-mount small package
116
(0.625)
■ Applications
• Optical disk drive of CD-ROM, DVD-ROM, CD-R, CD-RW etc.
11.0±0.3
0.65
Seating plane
SSOP032-P-0300
0.3
+0.10
–0.05
17
6.1±0.3
8.1±0.3
1.5±0.2
0.65±0.100.65±0.10
0.1±0.1
Unit: mm
+0.10
0.2
–0.05
(0.5)
1
AN8472SA ICs for Compact Disc/CD-ROM Player
■ Block Diagram
Start
FG
H1H
H1L
H2H
H2L
H3H
H3L
VH
EC
ECR
11
10
7
6
5
4
3
2
1
8
9
18
Start/stop
Hall amp.
matrix
Hall
bias
V
T
V
DD
16
BC4
15
BC3
14
Step-up voltage circuit
OSC
protection
Distributor
circuit
FF
SRESET
BC1
BC2
13
Thermal
RNFOUT
VPUMP
12
Amp.
Amp.
PWMOUT
×5
VM1
31
Output
circuit
19
27
28
24
25
21
22
23
26
17
VM2
A11
A12
A21
A22
A31
A32
RNF2
RNF1
GND
32
FC
Oscillator
SSET
■ Pin Descriptions
Pin No. Symbol Description
1 VH Hall bias pin
2 H3L Hall element-3 negative input pin
3 H3H Hall element-3 positive input pin
4 H2L Hall element-2 negative input pin
5 H2H Hall element-2 positive input pin
6 H1L Hall element-1 negative input pin
7 H1H Hall element-1 positive input pin
8 EC Torque command input pin
9 ECR Torque command reference input pin
10 FG FG signal output pin
11 Start Start/stop changeover pin
12 VPUMP Booster pin
V
C1
Pin No. Symbol Description
13 BC1 Booster capacitor connection pin 1
14 BC2 Booster capacitor connection pin 2
15 BC3 Booster capacitor connection pin 3
16 BC4 Booster capacitor connection pin 4
17 GND Ground pin
18 V
Supply voltage pin
DD
19 VM2 Motor supply voltage pin 2
20 N.C. N.C.
21 A31 Drive output 3
22 A32 Drive output 3
23 RNF2 Current det. pin 2
24 A21 Drive output 2
2
ICs for Compact Disc/CD-ROM Player AN8472SA
■ Pin Descriptions (continued)
Pin No. Symbol Description
25 A22 Drive output 2
26 RNF1 Current det. pin 1
27 A11 Drive output 1
28 A12 Drive output 1
■ Absolute Maximum Ratings
Parameter Symbol Rating Unit
2
Supply voltage
Drive output voltage
Control signal input voltage
Supply current I
Drive output current
Hall bias current
Power dissipation
Operating ambient temperature
Storage temperature
Note) Do not apply external currents or voltages to any pins not specifically mentioned.
For circuit currents, '+' denotes current flowing into the IC, and '−' denotes current flowing out of the IC.
1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
*
2: The voltage in the step-up voltage circuit exceeds the supply voltage.
*
3: The power dissipation shown is the value of independent IC without a heat sink at Ta = 70°C. Refer to the PD Ta curves
*
4: o = 19, 21, 22, 23, 24, 25, 26, 27, 28, 31
*
5: m = 21, 22, 24, 25, 27, 28
*
6: n = 8, 9, 11
*
7: n = 1, 2, 3, 4, 5, 6, 7
*
*
5
*
6
*
4
*
7
*
3
*
1
*
1
*
For the allowable value of the step-up voltage, refer to "■ Electrical Characteristics".
of the "■ Application Notes" for details.
V
V
V
V
V
I
I
HB(n)
P
T
T
DD
M1
M2
(m)
(n)
DD
(o)
D
opr
stg
Pin No. Symbol Description
29 N.C. N.C.
30 N.C. N.C.
31 VM1 Motor supply voltage pin 1
32 FC Oscillator pin
6V
15 V
0 to V
DD
30 mA
±1 200 mA
30 mA
293 mW
−20 to +70 °C
−55 to +150 °C
V
■ Recommended Operating Range
Parameter Symbol Range Unit
Supply voltage V
DD
V
M1
V
M2
4.5 to 5.5 V
3
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