LCP3121 STMICROELECTRONICS | Alldatasheet

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Application Specific Discretes A.S.D.™ LCP3121 OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE n UNIDIRECTIONAL OVERVOLTAGE SUP- PRESSOR PROGRAMMABLE BY VOLTAGE AND CURRENT: n PROGRAMMABLE BREAKDOWN VOLTAGE UP TO 100 V. n PROGRAMMABLE CURRENT LIMITATION FROM 120 mA TO 600 mA. n MULTI-LINE PROTECTION MODE : ONE DE- VICE CAN PROTECT SEVERAL LINES. n HIGH SURGE CURRENT CAPABILITY : I PP = 100A for 10/1000µs. FEATURES AND BENEFITS SO-8 Dedicated to the protection of sensitive telecom equipment, the LCP3121 provides protection which can be programmed by both voltage and current. The breakdown voltage can be easily programmed by using an external zener diode. The protection function programmed by the current is achieved with the use of a resistor between the gate and the cathode. The value of the resistor will determine the level of the desired current before the triggering of the device. A multiple protection mode is also performed when using several diodes providing each line interface with an optimized protection level. If desired, a bidirectional protection function can be achieved by the use of two LCP3121.

DESCRIPTION

April 2003 - Ed: 4 FUNCTIONAL DIAGRAM A Gp C Gn CCITT K20 : 10/700µs 6kV 5/310µs 150A VDE 0433 : 10/700µs 2kV 5/310µs 50A VDE 0878 : 1.2/50µs 1.5kV 1/20µs 40A FCC part 68 : 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 resistors or PTC. COMPLIES WITH THE FOLLOWING STANDARDS : PIN-OUT CONFIGURATION 4 5 Gn Gp A A C C C All cathod pins must be externally connected TM: ASD is trademarks of STMicroelectronics.

Symbol Parameter Value Unit IPP Peak pulse current (see note 1) 10/1000µs 100 A ITSM Non repetitive surge peak on-state current ( F=5 0H z ) tp = 10ms t=1 s A VAC VGA Maximum voltage between A and C Maximum voltage between G (Gn or Gp) and A 100 V Tstg Tj Storage temperature range Maximum junction temperature -4 0t o+1 5 0 150 TL Maximum lead temperature for soldering during 10s 260 °C ABSOLUTE MAXIMUM RATINGS (Tamb = 25°C) Note 1: Pulse waveform : 10/1000µst r=10µst p=1000µs 100 %I PP t tr p 0 t Symbol Parameter Value Unit R th (j-a)Junction to ambient 170 °C/W THERMAL RESISTANCE Symbol Parameter VRM Stand-off voltage VBR Breakdown voltage VBO Breakover voltage IH Holding current IBO Breakover current IRM Leakage current at VRM IR Leakage current at VR IPP Peak pulse current VR Continuous reverse voltage C off Off-state capacitance VG Gate voltage IGP Gp triggering current IGN Gn triggering current ELECTRICAL CHARACTERISTICS (Tamb = 25°C) VRM IH PPI IRM VBR IBO VBO VR IR

Symbol Test conditions Min. Max. Unit VG (note1) IGATE = 200mA (for eigher Gn or Gp) 0.6 1.8 V IGP VAnode-cathode= 60V 180 mA IGN VAnode-cathode= 60V 80 200 mA Note 1 :VG =V GN , measured between Gn and cathode VG =V GP , measured between Gp and anode 2 - OPERATION WITH GATE (Tamb =2 5° C ) Sym- bol Test conditions Min. Max. Unit IRM VRM = 60V VRM = 90V µA IR at VR = 180V 50 µA VBR at 1mA 100 V IBO 80 500 mA VBO Measured at 50Hz 180 V IH See the functional test circuit 100 mA 1 - OPERATION WITHOUT GATE (Tamb =2 5° C )

FUNCTIONAL HOLDING CURRENT (I H ) TEST CIRCUIT : GO-NO GO TEST 0.01 0.10 1 10 100 1000 ITSM (A) t(s) F=50Hz Tj initial = 25°c Fig. 1: Maximum non repetitive surge peak-on-state current versus overload duration. -40 -20 0 20 40 60 80 100 120 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Tj(°C) IH [Tj] / IH [Tj=25°C] Fig. 2:Relative variation of holding current versus junction temperature (typical values). This is a GO-NO GO test which allows to confirm the holding current (IH ) level in a functional test circuit. TEST PROCEDURE : - Adjust the current level at the IH value by short circuiting the D.U.T. - Fire the D.U.T. with a surge current : IPP = 10A, 10/1000µs. - The D.U.T. will come back to the off-state within a duration of 50ms max. R Surge generator V = -48 VBAT -VP-VP D.U.T

Application 1:Common protection for SLIC without integrated ring generator SLIC LCP3121 4*SMBYW01-200 -Vbat TIP RING SLIC4*SMBYW01-200 -Vbat TIP RING -Vbat Gn C A APPLICATION EXAMPLES Application 2:Common protection for SLIC with integrated ring generator LCP3121 4*SMBYW01-200 TIP RING -Vbat Gn C A -Vbat +Vbat LCP3121 +Vbat GpC A SLIC L3000N4*SMBYW01-200 TIP RING -Vbat +Vbat SLIC L3000N Application 3:Typical SLIC protection 4*SMBYW01-200 -Vbat -Vbat SLICA Gn LCP3121 C TIP RING Application 4:Protection programmed by current for any application LCP3121 A C Gn Protected Circuit Ra I= I +T G VG Ra IT CURRENT TOLERANCE R a Ω (+/-5%) IT mA min IT mA max 4.7 5.6 6.8 8.2 202 182 164 150 137 128 603 538 479 431 388 358

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics © 2003 STMicroelectronics - Printed in Italy - All rights reserved. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com PACKAGE MECHANICAL DATA SO-8 Plastic REF. DIMENSIONS Millimetres Inches A 1.75 0.069 a1 0.1 0.25 0.004 0.010 a2 1.65 0.065 b 0.35 0.48 0.014 0.019 b1 0.19 0.25 0.007 0.010 C 0.50 0.020 c1 45° (typ) D 4.8 5.0 0.189 0.197 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F 3.8 4.0 0.15 0.157 L 0.4 1.27 0.016 0.050 M 0.6 0.024 S 8° (max) Package Type Marking SO-8 LCP3121 CP3121 MARKING Weight =0.08 g Packaging :Products supplied in anti-static tubes or tape and reel. ORDER CODE LCP 31 2 1 RL LINE CARD PROTECTION NUMERAL CODE VERSION PACKAGE: 1 = SO-8 PACKAGING: RL = Tape and reel