CLP200M Datasheet, PDF (11/21 Pages) STMicroelectronics – OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE

Fig. 22 : CLP200M response to a positive surge.
3.3.2 Power induction test
(Test 3a and 3b, table 2/K20)
Fig. 24 : Power induction test.
CLP200M
I1
V(RMS)
50 Hz
4Ω
Rsense
TIPL
TIPS
1/2 CLP200M
GND
50
I2
Rp
-48V
V1
LCP1511D
SLIC
V2
TEST
3a
3b
V_(RMS)
300
300
R(Ω)
600
200
Duration
0.2s
?
Fig. 23 : CLP200 M response to a negative surge.
Figures 25 and 26 show that the maximum remain-
ing voltage does not exceed +2V for positive
surges and -55V for negative surges.
Consequently,the CLP200M totally fulfills this test.
The test duration is not specified in test 3b. If the
duration exceeds 5s we do suggest to follow the
soldering and mounting recommendations given
on page 17 of this document.
Fig. 25 : Induction test behavior (Test 3a).
Figures 22 and 23 give the voltage and current be-
havior during positive and negative 4kV, 10/700µs,
surge tests using a LCP1511D as second stage
protection device. The firing threshold values are
now adjusted to GND and to -Vbat (-48V) by the
action of the second stage protectionwhich acts as
an external voltage reference.
As shown on these figures, the maximum remain-
ing voltage does not exceed +2.5V for positive
surges and -60V for negative surges.
Consequently,the CLP200M totally fulfills this test.
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