LCP3121 Fast Delivery |IC PHOENIX CO.,LIMITED

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LCP3121
OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE
Application Specific Discretes
A.S.D.
LCP3121
OVERVOLTAGE AND OVERCURRENT
PROTECTION FOR TELECOM LINE
UNIDIRECTIONAL OVERVOLTAGE SUP-
PRESSOR PROGRAMMABLE BY VOLTAGE
AND CURRENT:
PROGRAMMABLE BREAKDOWN VOLTAGE TO 100V.
PROGRAMMABLE CURRENT LIMITATION
FROM 120 mA TO 600 mA.
MULTI-LINE PROTECTION MODE: ONE DE-
VICE CAN PROTECT SEVERALLINES.
HIGH SURGECURRENT CAPABILITY:
IPP= 100Afor 10/1000 μs.
FEATURES AND BENEFITS
SO8
Dedicatedto the protectionof sensitive telecom
equipment, the LCP3121 provides protection
which can be programmedby both voltage and
current.
Thebreakdownvoltagecanbe easilyprogrammed usingan externalzener diode.
Theprotectionfunctionprogrammedby the current achieved with the useofa resistor between the
gate and the cathode.The valueof the resistor will
determine the levelof the desired current before
the triggeringof thedevice. multipleprotectionmodeis alsoperformed when
using several diodes providing each line interface
withan optimized protection level. desired,a bidirectionalprotectionfunctioncanbe
achievedby the useof twoLCP3121.
DESCRIPTION
September 1998- Ed:3
FUNCTIONAL DIAGRAM
CCITT K20: 10/700μs 1kV
5/310μs 25A
VDE 0433: 10/700μs 2kV
5/310μs 50A
VDE 0878: 1.2/50μs 1.5kV
1/20μs 40A
FCC part68: 2/10μs 2.5kV
2/10μs 200A(*)
BELLCORE
TR-NWT-001089: 2/10μs 2.5kV
2/10μs 200A(*)
BELLCORE
TR-NWT-000974: 10/1000μs 1kV
10/1000μs 100A
(*) with series resistorsor PTC.
COMPLIESWITHTHE FOLLOWINGSTANDARDS:
PIN-OUT CONFIGURATION 5C A C
All cathod pins mustbe externally connected
TM: ASDis trademarksof SGS-THOMSONMicroelectronics.
1/6
Symbol Parameter Value Unit
IPP Peakpulse current (see note1) 10/1000μs 100 A
ITSM Non repetitivesurge peak on-statecurrent=50 Hz)= 10ms1s
VAC
VGA
Maximum voltage betweenA andC
Maximum voltage betweenG (Gnor Gp)andA
Tstg
Storage temperature range
Maximum junction temperature40to+ 150
150 Maximum lead temperaturefor soldering during 10s 260 °C
ABSOLUTE MAXIMUM RATINGS (Tamb =25°C)
Note1: Pulse waveform:
10/1000μstr=10μstp=1000μs 100PP tr p t
Symbol Parameter Value Unit
Rth (j-a) Junctionto ambient 170 °C/W
THERMAL RESISTANCE
Symbol Parameter
VRM Stand-offvoltage
VBR Breakdownvoltage
VBO Breakovervoltage Holding current
IBO Breakovercurrent
IRM Leakage currentat VRM Leakage currentat VR
IPP Peakpulse current Continuousreverse voltage
Coff Off-state capacitance Gatevoltage
IGP Gp triggering current
IGN Gn triggering current
ELECTRICAL CHARACTERISTICS (Tamb =25°C)
VRMI
IRM
VBR
IBO
VBO
LCP3121
2/6
Symbol Test conditions Min. Max. Unit
note1
IGATE= 200mA (for eigher Gnor Gp) 0.6 1.8 V
IGP VAnode-cathode= 60V 180 mA
IGN VAnode-cathode= 60V 80 200 mA
Note1: VG=VGN,measured betweenGn and cathode
VG=VGP, measured betweenGpand anode- OPERATION WITHGATE (Tamb =25 °C)
Symbol Test conditions Min. Max. Unit
IRM VRM= 60V
VRM= 90V at VR= 180V 50 μA
VBR at 1mA 100 V
IBO 80 500 mA
VBO Measuredat 50Hz 180 V Seethe functional test circuit 100 mA
CVR =-5V F=1MHz 100 pF- OPERATIONWITHOUT GATE (Tamb =25 °C)
LCP3121
3/6
FUNCTIONAL HOLDINGCURRENT (IH) TEST CIRCUIT: GO-NOGO TEST
0.01 0.10 1 10 100 1000
ITSM(A)
t(s)
F=50Hz
Tjinitial =25°c
Fig.1: Maximum non repetitive surge peak-on-
state currentversus overloadduration.
-40 -20 0 20 40 60 80 100 1200.0
Tj(°C) [Tj]/ IH[Tj=25°C]
Fig.2: Relative variationof holding current versus
junction temperature (typical values).
Thisisa GO-NO GO testwhich allowsto confirmthe holdingcurrent(IH) levelina functionaltest circuit.
TEST PROCEDURE: Adjust the current levelat theIH valueby short circuiting the D.U.T. Fire the D.U.T. witha surge current: IPP= 10A, 10/1000μs. The D.U.T. will come backto the off-state withina durationof 50ms max.
Surge
generator = -48VBAT
-VP
D.U.T
LCP3121
4/6
Application1 :Common protectionfor SLIC
withoutintegrated ring generator
SLIC
LCP3121
4*SMBYW01-200
-Vbat
TIP
RING
SLIC4*SMBYW01-200
-Vbat
TIP
RING
-VbatC A
APPLICATION EXAMPLES
Application2: Common protectionfor SLIC with
integrated ringgenerator
LCP3121
4*SMBYW01-200
TIP
RING
-VbatC A
-Vbat +Vbat
LCP3121
+VbatC A
SLIC
L3000N4*SMBYW01-200
TIP
RING
-Vbat +Vbat
SLIC
L3000N
Application3 :TypicalSLIC protection
4*SMBYW01-200
-Vbat
-Vbat
SLIC
LCP3121
TIP
RING
Application4: Protectionprogrammedby current
LCP3121
Protected
CircuitI+T GG
CURRENT TOLERANCE
(+/-5%)
min
max
LCP3121
5/6
Informationfurnishedis believedtobe accurateand reliable.However,STMicroelectronics assumesnoresponsIbility forthe consequencesof
useof such informationnor forany infringementof patents orother rights ofthirdpartieswhich mayresult fromits use.No licenseis grantedby
implicationor otherwise under any patentor patent rightsof STMicroelectronics. Specifications mentionedinthis publicationare subjectto
changewithout notice. This publication supersedesand replacesall informationpreviously supplied.
STMicroelectronics productsarenot authorizedforuseas critical componentsinlife support devicesor systems without express writtenap-
provalofSTMicroelectronics.
TheST logoisa registered trademarkof STMicroelectronics 1998 STMicroelectronics- Printedin Italy-All rights reserved.
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PACKAGE MECHANICAL DATA
SO8Plastic
REF.
DIMENSIONS
Millimetres Inches
Min. Typ. Max. Min. Typ. Max. 1.75 0.069 0.1 0.25 0.004 0.010 1.65 0.065 0.35 0.48 0.014 0.019 0.19 0.25 0.007 0.010 0.50 0.020 45°(typ) 4.8 5.0 0.189 0.197 5.8 6.2 0.228 0.244 1.27 0.050 3.81 0.150 3.8 4.0 0.15 0.157 0.4 1.27 0.016 0.050 0.6 0.024
S8° (max)
Package Type Marking
SO8 LCP3121 CP3121
MARKING Weight= 0.08g
Packaging: Products suppliedin anti-static tubes tape and reel.
ORDERCODE
LCP 31 2 1 RL
PACKAGING:= tapeand reel. tube.
LINECARD
PROTECTION
VERSION
PACKAGE:= SO8.
NUMECAL CODE
LCP3121
6/6

Partno	Mfg	Dc	Qty	Available	Descript
LCP3121	ST	N/a	200	avai	OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE