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CLP30-200B1 Datasheet(PDF) 4 Page - STMicroelectronics

No. de Pieza. CLP30-200B1
Descripción  OVERVOLTAGE & OVERCURRENT PROTECTION FOR TELECOM LINE
Descarga  11 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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CLP30-200B1 Datasheet(HTML) 4 Page - STMicroelectronics

 
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CLP30-200B1
4/11
Figure above shows the topology of a protected
analog subscriber line at the line card side.
s
A first stage based on CLP30-200B1 manages
the high power issued from the external surges.
When used in ringing mode, the CLP30-200B1
operates in voltage mode and provides a
symmetrical and bidirectional overvoltage
protection above 200 V on both TIP and RING
lines. When used in speech mode, the
CLP30-200B1 operates in current mode and
the activation current of the CLP30-200B1 is
adjusted by RSENSE.
s
A second stage which is the external voltage
reference device defines the firing threshold
voltage during the speech mode and also
assumes a residual power overvoltage
suppression. This stage can be either a fixed or
programmable device such as LCP1511D.
APPLICATION CIRCUIT : CLP30-200B1 in line card
RINGS
-Vbat
-Vbat
R sense
TIP
SLIC
Overvoltage
reference
(> 200 V)
Overvoltage
detector
Overcurrent
detector
OR
Overvoltage
reference
(> 200 V)
Overvoltage
detector
Overcurrent
detector
OR
TIPL
TIPS
RINGL
GND
SW1
SW2
R sense
1
1
2
2
Ring
Generator
TIP
RING
External
voltage
reference
RING
I
Rp
Rp
R sense
R
R
PTC
PTC
Fig.3 : CLP30-200B1 in line card


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