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ESTW025A0F41Z 参数 Datasheet PDF下载

ESTW025A0F41Z图片预览
型号: ESTW025A0F41Z
PDF下载: 下载PDF文件 查看货源
内容描述: ESTW025A0F系列(八分之一砖)的DC -DC转换器电源模块 [ESTW025A0F Series (Eighth-Brick) DC-DC Converter Power Modules]
分类和应用: 转换器电源电路
文件页数/大小: 20 页 / 1282 K
品牌: LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
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Data Sheet  
ESTW025A0F Series Eighth-Brick Power Modules  
36–75Vdc Input; 3.3Vdc Output; 25A Output  
October 11, 2011  
Surface Mount Information  
the plating on the connection to ensure a reliable  
solder joint. There are several types of SMT reflow  
technologies currently used in the industry. These  
surface mount power modules can be reliably  
soldered using natural forced convection, IR (radiant  
infrared), or a combination of convection/IR. For  
reliable soldering the solder reflow profile should be  
established by accurately measuring the modules CP  
connector temperatures.  
Pick and Place  
The ESTW025A0F modules use an open frame  
construction and are designed for a fully automated  
assembly process. The modules are fitted with a  
label designed to provide a large surface area for pick  
and place operations. The label meets all the  
requirements for surface mount processing, as well as  
safety standards, and is able to withstand reflow  
temperatures of up to 300oC. The label also carries  
product information such as product code, serial  
number and the location of manufacture.  
300  
Peak Temp 235oC  
250  
Cooling  
zone  
Heat zone  
max 4oCs-1  
200  
150  
10 0  
50  
1- 4 oCs-1  
Soak zone  
30-240s  
T
lim above  
205oC  
Preheat zone  
max4oCs-1  
0
Figure 18. Pick and Place Location.  
Nozzle Recommendations  
REFLOW TIME (S)  
Figure 19. Reflow Profile for Tin/Lead (Sn/Pb)  
process.  
The module weight has been kept to a minimum by  
using open frame construction. Even so, these  
modules have a relatively large mass when compared  
to conventional SMT components. Variables such as  
nozzle size, tip style, vacuum pressure and placement  
speed should be considered to optimize this process.  
The minimum recommended nozzle diameter for  
reliable operation is 6mm. The maximum nozzle outer  
diameter, which will safely fit within the allowable  
component spacing, is 9 mm.  
240  
235  
230  
225  
220  
215  
210  
205  
200  
Oblong or oval nozzles up to 11 x 9 mm may also be  
used within the space available.  
Tin Lead Soldering  
0
10  
20  
30  
40  
50  
60  
Figure 20. Time Limit Curve Above 205oC for  
Tin/Lead (Sn/Pb) process  
The ESTW025A0F power modules are lead free  
modules and can be soldered either in a lead-free  
solder process or in a conventional Tin/Lead (Sn/Pb)  
process. It is recommended that the customer review  
data sheets in order to customize the solder reflow  
profile for each application board assembly. The  
following instructions must be observed when  
soldering these units. Failure to observe these  
instructions may result in the failure of or cause  
damage to the modules, and can adversely affect  
long-term reliability.  
Lead Free Soldering  
The –Z version of the ESTW025A0F modules are  
lead-free (Pb-free) and RoHS compliant and are both  
forward and backward compatible in a Pb-free and a  
SnPb soldering process. Failure to observe the  
instructions below may result in the failure of or cause  
damage to the modules and can adversely affect  
long-term reliability.  
In a conventional Tin/Lead (Sn/Pb) solder process  
peak reflow temperatures are limited to less than  
235oC. Typically, the eutectic solder melts at 183oC,  
wets the land, and subsequently wicks the device  
connection. Sufficient time must be allowed to fuse  
Reflow Soldering Information  
The surface mountable modules in the  
ESTW025A0F-S family use our newest SMT  
LINEAGE POWER  
10