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參數(shù)資料
| 型號： | CLP200M |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE |
| 中文描述： | 過壓和過流保護的電信線路保護 |
| 文件頁數(shù)： | 6/21頁 |
| 文件大?。?/td> | 232K |
| 代理商： | CLP200M |
externalreferencesupplies,V
b1
andV
b2
(seefig.5b).
.
Fig. 5b:
Methodto adjustthe referencevoltage
.
RINGS
R sense
Rp
1
2
Overvoltage
reference
(+/- 215 V)
Overvoltage
detector
Overcurrent
detector
OR
Overvoltage
reference
(+/- 215 V)
Overvoltage
detector
Overcurrent
detector
OR
TIPL
TIPS
RINGL
FS
GND
SW3 SW1
SW4 SW2
R sense
1
2
Rp
Fuse
Fuse
TIP
RING
VB1
VB2
2.4 Speechmode
Fig.6 :
Switchingby currentduringspeechmode
.
R sense
Rp
1
2
Overvoltage
reference
(+/- 215 V)
Overvoltage
detector
Overcurrent
detector
OR
TIPL
TIPS
FS
SW3 SW1
Fuse
TIP
GND
-Vbat
voltage
reference
I
LG
V
LG
I
LG
V
A2
LG
4
5
6
V
REF1
-V
REF2
In speechmode (Ring relay in position1), the pro-
tection is provided by the combination of both
CLP200M and the external voltage reference de-
vice.
In normal conditions, the working point of this cir-
cuit is located in region 4 of
A2
curve : the
CLP200Mis idle.
Whena surgeoccurson the line,theexternal volt-
age reference device clamps at GND or -V
bat
re-
spectivelyforpositiveand negativesurges.
This generates a current which is detected by
R
SENSE
andcausestheprotectiontoact: thelineis
short-circuitedto GND.
The operatingpoint movesto region 5 for positive
surgesor region6 fornegative surges.
Once the surge current falls below the switching-
off current I
SWOFF
, the CLP200M returns to its in-
itialstate (region4).
Furthermore, the CLP200M switches when an
overvoltage, either positive or negative, occurs
either:
simultaneouslyon bothTIP and RING lines ver-
susGND.
betweenTIP andRING.
on TIP (or RING)versusGND.
CLP200M
6/21
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