參數(shù)資料
型號: MIC2594-2BM TR
廠商: Micrel Inc
文件頁數(shù): 13/21頁
文件大?。?/td> 1079K
描述: IC CTRLR HOT SWAP NEG HV 8-SOIC
標準包裝: 2,500
類型: 熱交換控制器
應(yīng)用: 通用
內(nèi)部開關(guān):
電源電壓: -19 V ~ -80 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOIC
包裝: 帶卷 (TR)
其它名稱: MIC2594-2BMTR
MIC2594-2BMTR-ND
MIC2588/MIC2594
Micrel
M9999-083005 
13
September 2005
the OFF pin falls below its V
OFFL
 threshold value, or the part
turns off due to a fault. Should either event occur, the GATE
pin is immediately pulled low and will remain low until the
ON pin once again exceeds its V
ONH
threshold. The circuits
turn-on and turn-off points are set using the resistor divider
R1, R2, and R3 as shown in the Typical Application. The
equations to establish the trip points are shown below. In the
following example, the circuits nominal ON threshold is set to
V
ON
  =
 
  40V and the circuits nominal OFF threshold is
V
OFF
 = 35V.
 
V    =V    (typ)
R1  R2  R3
R3
V
=V
(typ)
R1  R2  R3
R2  R3
ON
ONH
OFF
OFFL
?/DIV>
+    +
(
)
?/DIV>
+    +
(
)
+
(
)
Given V
OFF
, V
ON
, and any one resistor value, the remaining
two resistor values can be readily found. A suggested value
for R3 is that which will provide a minimum of 100礎(chǔ) of cur-
rent through the voltage divider chain at V
DD
 = V
OFF
. This
yields the following as a starting point:
 
R3=
V
(typ)
100 A
12.23k
OFFL
m
=
W
The closest standard 1% value for R3 = 12.4k?
solving for R2 and R1 yields:
 
R2 =R3
V
V
 1
R2 =12.4k
40V
35V
 1
R2 =1.771k
ON
OFF
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
W ?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
W
The closest standard 1% value for R2 = 1.78k?
 
R1=R3
V    1.223V
1.223V
 R2
R1=12.4k
40V  1.223V
1.223V
 1.78k&
R1= 391.380k
ON
?/DIV>
(
)
W ?/DIV>
(
)
W
The closest standard 1% value for R1 = 392k?
Using standard 1% resistor values, the circuits nominal
ON and OFF thresholds are:
    V
ON
 = 40.1V
    V
OFF
 = 35V
Good general engineering design practices must consider
the tolerances associated with these parameters, including
but not limited to, power supply tolerance, undervoltgae
and overvoltage tolerances, and the tolerances of the
external passive components.
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