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SMP100LC-25 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
View to exact match
SMP100LC-25
ST-Microelectronics
STMicroelectronics ST-Microelectronics
SMP100LC-25 Datasheet PDF : 12 Pages
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SMP100LC
Application information
Figure 7.
Variation of thermal impedance
junction to ambient versus pulse
duration (PCB - FR4, SCu = 35µm,
recommended pad layout)
Zth(j-a)/Rth(j-a)
100
10
1
1E-3
1E-2
tp(s)
1E-1
1E+0
1E+1
1E+2 5E+2
Figure 8.
Relative variation of junction
capacitance versus reverse voltage
applied (typical values)
C [VR] / C [VR=2V]
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1
2
5
VR(V)
10
20
F =1MHz
VRMS = 1V
Tj = 25°C
50
100
300
2
Application information
In wireline applications, analog or digital, both central office and subscriber sides have to be
protected. This function is assumed by a combined series / parallel protection stage.
Figure 9.
Examples of protection stages for line cards
Ring
relay
Line
Line
Ex. Analog line card
Ex. xDSL line card or terminal
In such a stage, parallel function is assumed by one or several Trisil, and is used to protect
against short duration surge (lightning). During this kind of surges the Trisil limits the voltage
across the device to be protected at its break over value and then fires. The fuse assumes
the series function, and is used to protect the module against long duration or very high
current mains disturbances (50/60Hz). It acts by safe circuit opening. Lightning surge and
mains disturbance surges are defined by standards like GR1089, FCC part 68, ITU-T K20.
Figure 10. Typical circuits
Fuse TCP 1.25A
Fuse TCP 1.25A
Tip L
T1
SMP100LC-xxx
Gnd
T2
Fuse TCP 1.25A
Ring L
Tip S
SMP100LC-xxx
Gnd
SMP100LC-xxx
Ring S
Typical circuit for subscriber side
Typical circuit for central office side
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