Motor de Búsqueda de Datasheet de Componentes Electrónicos
Selected language     Spanish  ▼

Delete All
ON OFF
ALLDATASHEET.ES

X  

Preview PDF Download HTML

CLP270M Datasheet(PDF) 7 Page - STMicroelectronics

No. de Pieza. CLP270M
Descripción  OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE
Descarga  24 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo 

CLP270M Datasheet(HTML) 7 Page - STMicroelectronics

Zoom Inzoom in Zoom Outzoom out
 7 / 24 page
background image
CLP270M
7/24
The operating point moves to region 5 for positive surges or region 6 for negative surges.
Once the surge current falls below the switching-off current ISWOFF, the CLP270M returns to its initial state
(region 4).
The choice of the switching-on currents is function of the Rsense resistors.
In normal operating condition the current (typically below -100 mA) should not activate the protection
device CLP270M. Therefore the level of activation is to be chosen just above this limit (-200 mA). This level
is adjusted through Rsense.
Figures 7a and 7b enable the designers to choose the right Rsense value.
EXAMPLE :
The choice of Rsense =4
Ω ensures a negative triggering of -190 mA min and -320 mA max. In this case, the
positive triggering will be 150mA min and 280 mA max.
2.5. Failure Status
The CLP270M has an internal feature that allows the user to get a Failure Status (FS) indication. When the
CLP270M 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 provide 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 CLP270M occurs on the line, the device will fail in a
short-circuit state.
3
5
7
9
11
13
0.2
0.3
0.5
1
2
Rsense ( )
ISWON (T, Rsense) / ISWON (25°C, 4
)
@-20°C @25°C
@75°C
35
7
9
11
50
100
200
300
500
Rsense ( )
Iswon @ 25°C (mA)
Iswon min
negative
Iswon max
negative
Iswon min
positive
Iswon max
positive
Fig. 7a and 7b: Switching-on current versus Rsense.
CLP270M
Rsense
Rsense
1
FAILURE
+12V
1k
STATUS
Fig. 8: Failure Status circuit and diagnostic.
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
10
10
20
50
100
200
500
1 000
2 000
5 000
t (ms)
Fig. 9 : Operation limits and destruction zone of
the CLP270M.


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24 


Datasheet Download




Enlace URL




Privacy Policy
ALLDATASHEET.ES
Does ALLDATASHEET help your business so far?  [ DONATE ]  

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Favorito   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn