參數(shù)資料
型號: MIC2086-MBQS TR
廠商: Micrel Inc
文件頁數(shù): 17/29頁
文件大?。?/td> 1008K
描述: IC CTRLR HOW SWAP SGL 20-QSOP
標(biāo)準(zhǔn)包裝: 2,500
類型: 熱交換控制器
應(yīng)用: 通用型 Infiniband?
內(nèi)部開關(guān):
電源電壓: 2.3 V ~ 16.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 20-QSOP
包裝: 帶卷 (TR)
其它名稱: MIC2086-MBQSTR
MIC2086-MBQSTR-ND
Micrel, Inc.
MIC2085/2086
 
 
May 2006 
17
M9999-050406
(408) 955-1690
 
overvoltage protection circuitry, resistors R2 and R3 in
Figure 5. For input overvoltage protection, the first
consideration is to establish the input voltage level that
indicates an overvoltage triggering a sys-tem (output
voltage) shut down. For this example, the input value for
which a 12V supply will signal an output shut down is
13.2V (+10%). Similarly, from the previous example:
1)   Choose R3 to satisfy 100礎(chǔ) condition.
 
11.9k&
100?/DIV>
1.19V
100?/DIV>
V
R3
(MIN)
OV
e
?/DIV>
e
?/DIV>
e
 
R3 is chosen as 13.7k& ?1%.
2)   Thus,   following   the   previous   example   and
substituting   R2   and   R3   for   R5   and   R6,
respectively, and 13.2V overvoltage for 11V
output good, the same formula yields R2 of
138.3k&.The next highest standard 1% value is
140k&.
Now, consider the 12.6V maximum input voltage (V
CC
 
+5%), the higher tolerance for R3 and lower tolerance
for R2, 13.84k and 138.60k&, respectively. With a 12.6V
input, the voltage sensed at the OV pin is below V
OV(MIN)
,
and the MIC2085/86will not indicate an overvoltage
condition until VCC exceeds at least 13.2V.
 
 
 
Figure 5. Undervoltage/Overvoltage Circuit
 
 
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