AN8481SB Datasheet, PDF (2/6 Pages) Panasonic Semiconductor – Spindle motor driver IC for optical disk

AN8481SB
s Block Diagram
ICs for Motor
FG
comparator
21
REF
V_REG ¹⁹
Lower
side
V_CE
detection
Amp.
Amp.
Upper side
distribution
Lower side
distribution
Thermal
protection
circuit
VTL
13
V_CC
PCS ¹⁸
SWB ¹⁷
SWG ¹⁶
GND ¹⁴
Amp.
Direction changeover
Direction
detection
12 _PCI
Absolute
value
Logic
ER
EP = ER × EA
Start/stop
Triangular
Detection
wave
Hall
EA
bias
Hall amp. matrix
8 _S/S
s Pin Descriptions
Pin No. Symbol
Description
Pin No. Symbol
Description
1
H1+ Hall element-1 positive input pin
11
EC Torque command input pin
2
H1− Hall element-1 negative input pin
12
PCI Current feedback phase compensation pin
3
H2+ Hall element-2 positive input pin
13
V_CC Supply voltage pin
4
H2− Hall element-2 negative input pin
14
SG Signal GND pin
5
H3+ Hall element-3 positive input pin
15
FC Triangular wave oscillation pin
6
H3− Hall element-3 negative input pin
16 SWG SW-REG system GND pin
7
VH Hall bias pin
17 SWB SW-REG driving pin
8
SS Start/stop changeover pin
18
PCS SW-REG system phase compensation pin
9
FG FG signal output pin
19
V_REG Fixed power supply pin
10
ECR Torque command reference input pin 20
VM Motor supply voltage pin
2