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0154008DR 参数 Datasheet PDF下载

0154008DR图片预览
型号: 0154008DR
PDF下载: 下载PDF文件 查看货源
内容描述: [DC-DC Converter Evaluation Board]
分类和应用:
文件页数/大小: 14 页 / 2656 K
品牌: VICOR [ VICOR CORPORATION ]
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2. Default Pin Strap Configuration  
a.Ensure the pin straps are in the following default locations before proceeding:  
nꢀENABLE = Not Used (enabled)  
nꢀTRIM_UP = Not Used  
nꢀTRIM_DN = Not Used  
nꢀOPT1 = Not Used  
nꢀOPT2 = Not Used  
3. Pin Strap Functions  
a.ENABLE – adding a strap on this pin will cause the converter to shut down.  
b.TRIM_UP – Adding a strap in this location will adjust the output voltage  
up by 10%.  
c.TRIM_DN – Adding a strap in this location will adjust the output voltage down  
by 10%. Only one strap can be connected at a time. If both trim straps are out,  
the output voltage should be set to the model’s nominal output.  
4. Trimming And Soft Start  
a.For those customers who wish to trim to another voltage by changing the preset  
trim resistors to another value, the trim equation shown in Figure 2 can be used:  
Figure 2.  
RINT  
Rlow = –V  
(
)
PI31xx Trim Equation  
desired  
Vout  
+ V  
(
)
desired  
nom  
Vout  
VERO + V  
Vref  
]
(
)
nom  
desired  
Rhigh  
=
(
–RSS  
)
Vref  
(
Voutnom) +  
V
[
desired  
Where: R1 = Rlow R3 = Rhigh VERO = 4.9 and Vref can be found in the appropriate  
model datasheet.  
Figure 3 shows an equation for soꢀ start configuration where C7 = C  
REF  
Figure 3.  
−6  
T
ssdesired – 230 10  
PI31xx Soft Start Equation  
CREF  
=
23000  
Figure 4.  
PI31xx Trimming Equivalent  
Circuit  
ENABLE  
PI31xx  
Rhigh  
10k  
RSS  
TRIM/SS  
VERO  
Vref  
Rlow  
SGND  
UG:301  
vicorpower.com  
Applications Engineering: 800 927.9474  
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