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| AN8472SA Datasheet, PDF (2/9 Pages) Panasonic Semiconductor – Spindle motor driver IC for optical disk | |||
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AN8472SA
s Block Diagram
ICs for Compact Disc/CD-ROM Player
Step-up voltage circuit
Start 11
FG 10
Start/stop
H1H 7
H1L 6
H2H 5
H2L 4
H3H 3
H3L 2
Hall amp.
matrix
VH 1
Hall
bias
EC 8
VT
ECR 9
OSC
Thermal
protection
Distributor
circuit
Amp.
Output
circuit
Amp.
PWMOUT
FF
SRESET
RNFOUT Ã5
19 VM2
27 A11
28 A12
24 A21
25 A22
21 A31
22 A32
23 RNF2
26 RNF1
17 GND
FC 32 Oscillator SSET
VC1
s Pin Descriptions
Pin No. Symbol
Description
Pin No. Symbol
Description
1
VH Hall bias pin
13
BC1 Booster capacitor connection pin 1
2
H3L Hall element-3 negative input pin 14
BC2 Booster capacitor connection pin 2
3
H3H Hall element-3 positive input pin
15
BC3 Booster capacitor connection pin 3
4
H2L Hall element-2 negative input pin 16
BC4 Booster capacitor connection pin 4
5
H2H Hall element-2 positive input pin
17
GND Ground pin
6
H1L Hall element-1 negative input pin 18
VDD Supply voltage pin
7
H1H Hall element-1 positive input pin
19
VM2 Motor supply voltage pin 2
8
EC Torque command input pin
20
N.C. N.C.
9
ECR Torque command reference input pin 21
A31 Drive output 3
10
FG FG signal output pin
22
A32 Drive output 3
11
Start Start/stop changeover pin
23
RNF2 Current det. pin 2
12 VPUMP Booster pin
24
A21 Drive output 2
2
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