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參數(shù)資料
| 型號： | AN8480NSB |
| 廠商： | PANASONIC CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | 3-phase full-wave motor driver IC |
| 中文描述： | CD MOTOR DRIVER, PDSO30 |
| 封裝： | 0.400 INCH, PLASTIC, HSOP-42/28 |
| 文件頁數(shù)： | 6/6頁 |
| 文件大?。?/td> | 65K |
| 代理商： | AN8480NSB |
AN8480NSB
ICs for Compact Disc/CD-ROM Player
6
I
Application Notes (continued)
Theory of thermal resistance
A chip temperature or the fin temperature can be understood in the same way as Ohm's Law.
T
j
: Chip temperature
T
a
: Ambient temperature
P
: Electric power generated by IC
R
j-c
: Thermal resistance between a chip and a package
R
c-a
: Thermal resistance between a package and a surface of a heat sink or free air
R
f
: Thermal resistance between a package and surface of a heat sink
T
j
=
T
a
+
P
×
(R
j-c
+
R
c-a
// R
f
)
Make sure that T
j
does not exceed 150
°
C.
If it exceeds 150
°
C, you can suppress the rise of a chip temperature by adding a heat sink which is equivalent to
R
f
in the above figure.
T
j
=
T
a
+
P
×
(R
j-c
+
R
c-a
// R
f
)
A package surface and the fin are available for a temperature measurement. But the fin part is recommendable for
measurement because a package surface measurement does not always promise you a consistent measuring result.
I
Application Circuit Example
R
f
T
j
R
j-c
R
c-a
T
a
P
ECR
S
1
1
1
2
1
1
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
B
T
EP
=
ER
×
EA
FG
comparator
VH
H3
H3
+
H2
H2
+
H1
H1
+
EC
Servo
torque
command
S
V
C
P
VM
CS1
A1
A2
A3
PG
FG
High: Start
Medium: FG is on.
Low: Stop
Low: Short brake
High: Reverce rotation brake
Low: TSD on
High: TSD off
V
CC
=
5 V
0.1
μ
F
V
M
=
12 V
R
CS
=
0.5
FG signal
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AN8480NSB-E1 | 制造商:Panasonic Industrial Company 功能描述:IC |
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| AN8488SB | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:3-phase full-wave motor driver and DC motor BTL driver IC |
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