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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(hù)的電信線路保護(hù) |
| 文件頁數(shù)： | 3/21頁 |
| 文件大小： | 232K |
| 代理商： | CLP200M |
Fig.1 :
Subscriberlineprotectiontopology
”PRIMARYPROTECTION”
”SECONDARYPROTECTION”
MDF
LINECARD
telecommunication
EXCHANGE
line
”SECONDARY PROTECTION”
MDF
LINECARD
telecommunication
EXCHANGE
line
CLP200M
SLIC
THDTxx or
SLIC
CLP200M
Fig. 2 :
Linecardprotection
- I
SWON
Programmable thanks to
an external resistor
Programmable thanks to
any external voltage reference
V
I
Line card operating conditions
+ I
SWON
APPLICATIONNOTE
1. INTRODUCTION
The aim of this section is to show the behaviorof
ournewtelecomlineprotectiondevice.Thisdevice
includes a primary protection level and is suitable
for main distribution frames and line cards. This
protection concept is explained and, in addition,
the CLP200M performances are analysed when
facing different surges as described in the CCITT
recommendations.
Figure 1 is a simplified block diagram of a sub-
scriber lineprotectionthat ismainlyused sofar.
Thisshowstwo differentthings :
A ”primaryprotection”locatedon theMainDistri-
butionFrame(MDF)eliminatescoarselythehigh
energy environmental disturbances (lightning
transientsand AC powermainsdisturbances)
A ”secondaryprotection”located on the line card
includesa primaryprotectionlevel(firststage)and
a residualprotection(second stage)which elimi-
natesfinelytheremainingtransientsthathavenot
beentotallysuppressedbythefirststage.
The CLP200M can be used both in MDFs and in
line cards. In that case, any line card may be
swappedfrom one MDFto anotherone withoutre-
ducing the efficiency of the whole system protec-
tion.
The CCITT requirements are different for these
two protection locations (MDFs and line cards).
Concerningthe”primaryprotection”,theCCITTre-
quires a 4kV, 10/700
μ
s surge test whereas the
”secondary protection” has to withstand a 1kV,
10/700
μ
s surgetest.
The explanations which follow are basically
covering the line card application.
2. SGS-THOMSONCLP200MCONCEPT
2.1Evolutionof the SLIC protection
Over the years, the silicon protection per-
formances have considerably changed.
The first generation of products like SMTHBTxx
and SMTHDTxx offered fixed overvoltage protec-
tion against surges on either TIP or RING line in
fourpackages.
The following generation like THBTxx and
THDTxx still offered fixed overvoltageprotection
againstsurges on both TIPand RINGlines in two
packages.
The next step was the introduction of the
LCP1511D which brought the advantage of full
programmablevoltage.
Today, the CLP200M combines the featuresof all
the previous generations. In addition to that, it of-
fers an overcurrent detection when operating in
speechmodeand alsoa FailureStatusoutputsig-
nal.
The figure 2 summarizes the performance of the
CLP200Mwhichbasicallyholdsthe SLIC insideits
correctvoltageand current values.
CLP200M
3/21
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| CLP200M_03 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE |
| CLP200M-TR | 功能描述:TVS二極管陣列 Telecom Protection RoHS:否 制造商:Littelfuse 極性: 通道:4 Channels 擊穿電壓: 鉗位電壓:11.5 V 工作電壓:2.5 V 峰值浪涌電流:20 A 安裝風(fēng)格:SMD/SMT 端接類型:SMD/SMT 系列: 最小工作溫度:- 40 C 最大工作溫度:+ 85 C |
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| CLP-203 | 制造商:Aavid Thermalloy 功能描述:- Bulk 制造商:Aavid Thermalloy 功能描述:MOUNTING CLIPS |
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