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参数资料
| 型号： | PKG2410PI |
| 厂商： | ERICSSON |
| 英文描述： | KPSE 10C 10#20 PIN PLUG |
| 中文描述： | 46？60瓦DC / DC电源模块24 V输入系列 |
| 文件页数： | 4/16页 |
| 文件大小： | 1290K |
| 代理商： | PKG2410PI |
4
EN/LZT 146 03 R1A (Replaces EN/LZT 137 R5) Ericsson Microelectronics AB, May 2000
Thermal Data
Two-parameter model
Power dissipation is generated in the components mounted on the
ceramic substrate. The thermal properties of the PKG DC/DC power
module is determined by thermal conduction in the connected pins
and thermal convection from the substrate via the case.
The two-parameter model characterize the thermal properties of the
PKG power module and the equation below can be used for thermal
design purposes if detailed information is needed. The values are given
for a power module mounted on a printed board assembly (PBA).
Note that the thermal resistance between the substrate and the air,
R
th sub-A
is strongly dependent on the air velocity.
T
sub
= P
d
× R
th sub-P
× R
th sub-A
/(R
th sub-P
+ R
th sub-A
) + (T
P
–T
A
)
× R
th sub-A
/(R
th sub-P
+ R
th sub-A
) + T
A
Where:
P
d
: dissipated power, calculated as P
O
× (1/ -1)
T
sub
: max average substrate temperature, T
C
max
T
A
: ambient air temperature at the lower side of the power
module
T
P
: average pin temperature at the PB solder joint
R
th sub-P
: thermal resistance from T
sub
to the pins
R
th sub-A
: thermal resistance from T
sub
to T
A
v
: velocity of ambient air.
Air velocity in free convection is 0.2–0.3 m/s (40-60 lfm).
Over Temperature Protection (OTP)
The PKG DC/DC power modules have an internal over temperature
protection circuit. If the case temperature exceeds min +115°C the
power module will go in to OTP-mode. As long as the case tempera-
ture exceeds min +115°C the power module will operate in OTP-
mode.
During OTP-mode the output voltage pulsates between zero and
nominal output voltage, which reduces the power loss inside the
power module. The PKG DC/DC power module will automatically
resume normal operation when the temperature decreases below
min +115°C.
Fundamental circuit diagrams
Electrical Data
Single output
4
2
1
3
Case
Control
Isolated feedback
9
8
10
4
2
1
3
Case
Control
Isolated feedback
10
9
8
7
6
Dual output
T
sub
R
th sub-A
R
th sub-P
T
A
T
P
P
d
R
th sub-P
T
sub
R
th sub-A
v
T
A
T
P
10
15
20
0
5
0
2
6
4
Air velocity (m/s)
R
(
t
R
= 2.5 C/W
th sub-P
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