CLP200M STMicroelectronics, CLP200M Datasheet - Page 4

• Manufacturer Part Number: CLP200M
• Description: IC OVP/OCP TELECOM POWERSO-10
• Manufacturer: STMicroelectronics

Specifications of CLP200M

• Voltage - Working: 200V
• Technology: Mixed Technology
• Number Of Circuits: 2
• Applications: Telecommunications
• Package / Case: PowerSO-10 Exposed Bottom Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Voltage - Clamping: -

CLP200M
Figure 3 above shows the topology of a protected
analog subscriber line at the exchange side. The
CLP200M is connected to the ring relay via two
balanced Rp resistors, and to the Subscriber Line
Interface Circuit. A second device is located near
the SLIC : it can be either a LCP1511D or a THDT
series.
These two devices are complementary and their
functions are explained below :
4/21
APPLICATION CIRCUIT : CLP200M in line card
Fig. 3 : CLP200M in line card
The first stage based on CLP200M manages
the high power issued from the external
surges. When used in ringing mode, the
CLP200M operates in voltage mode and pro-
vides
overvoltage protection at +/-215 V on both TIP
and RING lines. When used in speech mode,
the CLP200M operates in current mode and
the activation current of the CLP200M is ad-
justed by R
TIP
RING
Fuse
Fuse
a
FS
SENSE
symmetrical
SW3 SW1
SW4 SW2
.
(*) LCP1511D or THDT series
TIPL
RINGL
OR
OR
R sense
R sense
Overcurrent
Overcurrent
detector
detector
and
Overvoltage
Overvoltage
detector
detector
bidirectional
TIPS
RINGS
Overvoltage
Overvoltage
(+/- 215 V)
(+/- 215 V)
reference
reference
I
GND
Thanks to this topology, the surge current in the
line is reduced after the CLP200M. Because the
remaining surge energy is low, the power ratings of
Rp, the ring relay contacts and the external voltage
reference circuit may be downsized. This results in
a significant cost reduction.
The second stage is the external voltage refer-
ence device which defines the firing threshold
voltage during the speech mode and also as-
sumes
suppression. This protection stage can be either
a fixed or programmable breakover device. The
THDTxx family acts as a fixed breakover device
while the LCP1511D operates as a programma-
ble protection.
Rp
Rp
a
1
2
1
2
Generator
Ring
residual
reference
External
voltage
power
(*)
-Vbat
-Vbat
overvoltage
TIP
RING
SLIC