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参数资料
| 型号： | PKF4628 |
| 厂商： | ERICSSON |
| 英文描述： | 3?7 W DC/DC Power Modules 48 V Input Series |
| 中文描述： | 3？7瓦特DC / DC电源模块48 V输入系列 |
| 文件页数： | 4/24页 |
| 文件大小： | 1768K |
| 代理商： | PKF4628 |
4
EN/LZT 146 33 R1A (Replaces EN/LZT 137 09 R7) Ericsson Microelectronics AB, June 2000
Palladium plating is used on the terminal pins. A pin temperature
(T
p
) in excess of the solder fusing temperature (+183°C for Sn/Pb
63/37) for more than 25 seconds and a peak temperature above
195°C, is required to guarantee a reliable solder joint.
Both pin 1 and pin 9 must be monitored.
No responsibility is assumed if these recommendations are not
strictly followed.
Reflow Soldering Information
The PKF series of DC/DC power modules are manufactured in surface
mount technology. Extra precautions must therefore be taken when
reflow soldering the surface mount version. Neglecting the soldering
information given below may result in permanent damage or signifi-
cant degradation of power module performance.
The PKF series can be reflow soldered using IR, Natural Convection,
Forced Convection or Combined IR/Convection Technologies. The
high thermal mass of the component and its effect on T (°C) requires
that particular attention be paid to other temperature sensitive com-
ponents.
IR Reflow technology may require the overall profile time to be ex-
tended to approximately 8–10 minutes to ensure an acceptable T.
Higher activity flux may be more suitable to overcome the increase in
oxidation and to avoid flux burn-up.
The general profile parameters detailed in the diagram, with this ex-
tended time to reach peak temperatures, would then be suitable.
Note!
These are maximum parameters. Depending on process varia-
tions, an appropriate margin must be added.
Thermal Data
Two-parameter model
This model provides a more precise description of the thermal charac-
teristics to be used for thermal calculations.
Thermally the power module can be considered as a component and
the case temperature can be used to characterize the properties. The
thermal data for a power module with the substrate in contact with
the case can be described with two thermal resistances. One from case
to ambient air and one from case to PB (Printed circuit Board).
The thermal characteristics temperature can be calculated from the
following formula:
T
PB
= (T
C
–T
A
)×(R
th C–PB
+R
th C–A
)/R
th C–A
–P
d
×R
th C–PB
+T
A
Where:
P
d
:
T
C
:
T
A
:
dissipated power, calculated as P
O
×(l/ –1)
max average case temperature
ambient air temperature at the lower side of the power
module
temperature in the PB between the PKF connection pins
R
th C-PB
: thermal resistance from case to PB under the power
module
R
th C-A
:
thermal resistance from case to ambient air
v:
velocity of ambient air
R
th C-PB
is constant and R
th
C-A
is dependent on the air velocity.
T
PB
:
Free convection is equal to an air velocity of approx. 0.2 – 0.3 m/s.
See figure below.
相关PDF资料 |
PDF描述 |
|---|---|
| PKF4628PI | 3?7 W DC/DC Power Modules 48 V Input Series |
| PKF4628SI | 3?7 W DC/DC Power Modules 48 V Input Series |
| PKF4629 | 3?7 W DC/DC Power Modules 48 V Input Series |
| PKF4629PI | 3?7 W DC/DC Power Modules 48 V Input Series |
| PKF4629SI | KPSE 55C 55#20 PIN PLUG |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PKF4628PI | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:3?7 W DC/DC Power Modules 48 V Input Series |
| PKF4628SI | 制造商:Ericsson 功能描述: 制造商:Ericsson 功能描述:2-OUTPUT 6 W DC-DC REG PWR SUPPLY MODULE |
| PKF4629 | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:3?7 W DC/DC Power Modules 48 V Input Series |
| PKF4629PI | 制造商:ERICSSON 制造商全称:Ericsson 功能描述:3?7 W DC/DC Power Modules 48 V Input Series |
| PKF4629SI | 制造商:Ericsson 功能描述: |
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