参数资料
型号: PCX7447AVGH1000NB
厂商: Atmel
文件页数: 8/52页
文件大小: 0K
描述: IC MPU 32BIT 1000MHZ 360CBGA
标准包装: 44
处理器类型: PowerPC 32-位 RISC
速度: 1.0GHz
电压: 1.1V
安装类型: 表面贴装
封装/外壳: 360-CBBGA 裸露焊盘
供应商设备封装: 360-CBGA(25x25)
包装: 托盘
16
0833E–HIREL–01/07
PC7447A
e2v semiconductors SAS 2007
Figure 6-5.
Recommended Thermal Model of PC7447A
6.4.4.2
Temperature Diode
The PC7447A has a temperature diode on the microprocessor that can be used in conjunction with other
system temperature monitoring devices. These devices use the negative temperature coefficient of a
diode operated at a constant current to determine the temperature of the microprocessor and its environ-
ment. For proper operation, the monitoring device used should auto-calibrate the device by canceling out
the V
BE variation of each PC7447A’s internal diode.
The following are the specifications of the PC7447A on-board temperature diode:
V
f > 0.40V
V
f < 0.90V
Operating range 2 - 300 A
Diode leakage < 10 nA at 125°C
Ideality factor over 5 A – 150 A at 60°C: 1 <= n <= TBD
Ideality factor is defined as the deviation from the ideal diode equation:
Another useful equation is:
Bump and Underfill
Die
Substrate
Solder and Air
Die
Substrate
Side View of Model (Not to Scale)
x
y
z
Conductivity
Value
Unit
Bump and Underfill (7.3 x 9.3 x 0.070 mm)
W/(m x K)
Substrate (25 x 25 x 1.2 mm)
Solder Ball and Air (25 x 25 x 0.6 mm)
kx
0.6
ky
0.6
kz
1.9
kx
8.1
ky
8.1
kz
4.0
kx
ky
kz
0.034
3.8
I
fW
I
s e
qV
f
nKT
-----------
1
=
V
H
V
L
n
KT
q
------- In
I
H
I
L
-----
=
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