CLP200M_03 Datasheet, PDF (10/21 Pages) STMicroelectronics – OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE

CLP200M
Fig. 17 : CLP200M response to the induction test
(Test 3a).
The test 3 of CCITT K20 requires a serial PTC (or
fuse) which is inserted in the test circuit to limit the
current rate. This PTC acts like an open-circuit in a
non-instantaneous way when a surge occurs on
the line. Meanwhile, the CLP200M has to with-
stand the surge.
Fig. 19 : Power contact test.
I
600 Ω or < 10 Ω
V(RMS)
PTC
15min
50Hz
4
Rsense
TIPL
TIPS
1/2 CLP200M
GND
Rp
V
Fig. 20 : Power contact test 3 (With 10Ω series).
t(s) _{Fig. 18 : CLP200M reponse to the induction test}
c _{(Test 3b).}
te ^{Product(s) - Obsolete Produ Figures 17 and 18 show that the remaining voltage}
does not exceed 270 V.
le _{Consequently, the CLP200M totally fulfills this test.}
so The test duration is not specified in test 3b. If the
bduration exceeds 5s we do suggest to follow the
O^{soldering and mounting recommendations given}
Figure 20 shows that the remaining overvoltage
does not exceed 250 V and shows that the PTC
acts like an open-circuit after 60 ms.
Consequently, the CLP200M totally fulfills this test.
3.3. Speech mode
3.3.1. Lightning simulation test
(Test 2, table 2/K20)
on page 17 of this document.
Fig. 21: Lightning test in speech mode.
3.2.3 Power contact (Test 3 table 1/K20)
This long duration surge is produced when con-
necting a subscriber line to an AC mains line or
equipment. The purpose of this test is to check the
robustness of the CLP200M against these distur-
bances.
10/700µs
GENERATOR
+/- 4kV
I1
4
Rsense
50
I2
Rp
SLIC
TIPL
TIPS
1/2 CLP200M
GND
V1
-48V
V2
LCP1511D
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