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參數(shù)資料
| 型號： | CLP200 |
| 英文描述： | OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE - (ASD) |
| 中文描述： | 過壓和過流保護的電信線路保護- （ASD）的 |
| 文件頁數(shù)： | 7/21頁 |
| 文件大?。?/td> | 360K |
| 代理商： | CLP200 |
CLP200M
7/21
Fig. 7a and 7b
R
SENSE
.
:
Switching-on current versus
0.01
0.1
1
10
10
100
1000
t (ms)
Ipp (A)
Fig. 9 :
Operation limits and destruction zone of
the CLP200M.
CLP200M
Rsense
Rsense
1
FAILURE
STATUS
+12V
1k
Fig. 8 :
Failure Status circuit and diagnostic.
3
5
7
9
11
13
100
200
300
500
Rsense ( )
ISWON (mA)
-20°C
25°C
75°C
3
5
Rsense ( )
7
9
11
100
200
300
500
Iswon @ 25°C (mA)
Iswon min
negative
Iswon max
negative
Iswon min
positive
Iswon min
positive
The choice of the switching-on current is function
of the R
SENSE
resistors.
In normal operating condition, only the negative
current of the signal is of interest. This current (typ-
ically below -150 mA) should not activate the pro-
tection device CLP200M. Therefore the level of
activation is to be chosen just above this limit (typi-
cally -200 mA). This level is adjusted through
R
SENSE
.
Figures 7a and 7b enable the designers to choose
the right R
SENSE
value.
EXAMPLE :
The choice of R
SENSE
= 4
ensures a negative
triggering of -220 mA min and -320 mA max. In this
case, the positive triggering will be 180mA min and
280 mA max.
2.5 . Failure Status
The CLP200M has an internal feature that allows
the user to get a Failure Status (FS) indication.
When the CLP200M is short-circuiting the line to
GND, a signal can be managed through pin 1. This
signal can be used to turn a LED on in order to pro-
vide a surge indication. It may also be used with a
logic circuitry to count the number of disturbances
appearing on the lines.
If a surge exceeding the maximum ratings of the
CLP200Moccursontheline,thedevicewillfailina
short-circuit state.
The figure 9 shows two different curves :
I
The
lower
one
guaranted working limits of the CLP200M.
I
The upper curve shows the limit above which the
CLP200Miscompletelydestructed. Inthiscase,
the Fail Diagnostic pin is on.
indicates
the
maximum
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