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CLP270M Datasheet(PDF) 17 Page - STMicroelectronics

No. de Pieza. CLP270M
Descripción  OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE
Descarga  24 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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CLP270M Datasheet(HTML) 17 Page - STMicroelectronics

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TEST CIRCUIT FOR ISWOFF PARAMETER : GO-NO GO TEST
R
-VP
V
BAT
-48V
=
Surge
generator
D.U.T.
This is a GO-NO GO test which allows to confirm the switch-off (ISWOFF) level in a functional test circuit.
TEST PROCEDURE :
- Adjust the current level at the ISWOFF value by short circuiting the D.U.T.
- Fire the D.U.T. with a surge current : IPP = 10A, 10/1000
µs.
- The D.U.T. will come back to the OFF-state within a duration of 50ms max.
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
Fig. 26: Typical relative variation of switching-on cur-
rent (positive or negative) versus RSENSE resistor and
junction temperature (see test condition Fig. 28).
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. 27: Variation of switching-on current versus
RSENSE at 25°C.
TIPL
TIPS
GND
Rsense
RINGL RINGS
±
DUT
R
RL
I1
48 V
Fig. 28: ISWON MEASUREMENT
- Iswon = I1 when the CLP270M switches on (I1 is
progressively increased using R)
- Both TIP and RING sides of the CLP270M are
checked
-RL =10
Ω.
-40
-20
0
20406080
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Tj (°C)
ISWOFF [Tj°C] / ISWOFF [25°C]
Fig. 29: Relative variation of switching-off current
versus junction temperature for RSENSE between 3
and 10
Ω.


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