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| (R) TPP25011 OVERVOLTAGE and OVERCURRENT PROTECTION for TELECOM LINE Application Specific Discretes A.S.D.TM FEATURES s s s s UNIDIRECTIONAL FUNCTION PROGRAMMABLE BREAKDOWN VOLTAGE UP TO 250 V PROGRAMMABLE CURRENT LIMITATION FROM 40 mA TO 500 mA SURGE CURRENT CAPABILITY IPP = 30A 10/1000 s SO-8 DESCRIPTION Dedicated to sensitive telecom equipment protection, this device can provide both voltage and current triggered protection with a very tight tolerance. The breakdown voltage can be easily programmed by using an external zener diode. A multiple protection mode can be also performed when using several zener diodes, providing to each line interface an optimized protection level. The current limiting function 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. SCHEMATIC DIAGRAM COMPLIES WITH THE FOLLOWING STANDARDS : CCITT K17 : VDE 0433 : CNET : FCC part 68 : BELLCORE TR-NWT-000974 : (*) with series resistors or PTC. 10/700 5/310 10/700 5/310 0.5/700 0.2/310 2/10 2/10 s s s s s s s s 1.5 38 2k 40 1.5 38 2.5 75 kV A V A (*) kV A kV A (*) 10/1000 s 10/1000 s 1 kV 30 A (*) TM: ASD is trademarks of SGS-THOMSON Microelectronics. August 2001 - Ed: 4 1/7 TPP25011 ABSOLUTE MAXIMUM RATINGS (Tamb = 25 C) Symbol IPP Parameter Peak pulse current (see note 1) 10/1000s 5/310s 2/10s tp = 10ms t = 1s Value 30 40 75 5 3.5 - 55 to + 150 150 % I PP 100 Unit A ITSM Tstg Tj Non repetitive surge peak on-state current (F = 50Hz) Storage temperature range Maximum junction temperature A C Note 1 : Pulse waveform : 10/1000s tr=10s 5/310s tr=5s 2/10s tr=2s tp=1000s tp=310s tp=10s 50 0 tr tp t THERMAL RESISTANCES Symbol Rth (j-a) Junction to ambient Parameter Value 170 Unit C/W 2/7 TPP25011 ELECTRICAL CHARACTERISTICS (Tamb = 25C) Symbol VRM IRM VBR VBO IH IBO IPP VGN IG C Parameter Stand-off voltage Leakage current at stand-off voltage Breakdown voltage Breakover voltage Holding current Breakover current Peak pulse current Gate voltage Gate triggering current Capacitance 1 - OPERATION WITHOUT GATE Type IRM @ VRM max. A V VBR @ IR min. V mA VBO @ IBO max. V IH max. mA C max. note 3 pF min. note1 mA min. note 2 mA TPP25011 6 60 250 1 340 15 200 180 100 2 - OPERATION WITH GATE Type VGN @ IGN = 30 mA min. note 4 V V mA IG min. VA-C = 100 V mA max. max. TPP25011 Note 1: Note 2: Note 3: 1.05 1.35 5 40 See the reference test circuit 1. See test circuit 2. VR = 5V, F = 1MHz 3/7 TPP25011 REFERENCE TEST CIRCUIT 1 : tp = 20ms Auto Transformer 220V/2A static relay. K R1 140 R2 240 220V Vout IBO measure Transformer 220V/800V 5A D.U.T V BO measure TEST PROCEDURE : s s Pulse Test duration (tp = 20ms): - For Bidirectional devices = Switch K is closed - For Unidirectional devices = Switch K is open. VOUT Selection - Device with VBO < 200 Volt - VOUT = 250 VRMS, R1 = 140 . - Device with VBO 200 Volt - VOUT = 480 VRMS, R2 = 240 . FUNCTIONAL HOLDING CURRENT (IH) TEST CIRCUIT 2 = GO - NOGO TEST R D.U.T. V BAT = - 48 V Surge generator - VP This is a GO-NOGO Test which allows to confirm the holding current (IH) level in a functional test circuit. TEST PROCEDURE : s 1) Adjust the current level at the IH value by short circuiting the AK of the D.U.T. 2) Fire the D.U.T with a surge Current : Ipp = 10A , 10/1000 s. 3) The D.U.T will come back off-state within 50 ms max. 4/7 TPP25011 APPLICATION CIRCUIT Overvoltage protection and current limitation TPP250 Table below gives the tolerance of the limited current IT for each standardized resistor value. CURRENT TOLERANCE R ( 5%) 3.00 3.30 3.60 3.90 4.30 4.70 5.10 5.60 6.20 6.80 7.50 8.20 9.10 10.10 11.00 12.00 13.00 15.00 16.00 18.00 20.00 22.00 24.00 27.00 30.00 IT mA min 338 308 283 261 238 218 201 184 166 152 138 127 115 104 96 88 82 72 68 61 55 50 47 42 38 IT mA max 514 471 435 404 370 342 319 294 269 249 229 213 196 181 169 158 149 135 129 119 111 105 99 93 87 Line + LOAD 5/7 TPP25011 Telephone set protection PROTECTION MODES : OFF HOOK = Ringer circuit protection is insured with intrinsic breakdown voltage at 250 V ON HOOK = In dialing mode and in conversation mode, the breakdown voltage of TPP250 can be adapted at different levels with zener diodes. ORDER CODE TPP Telecom Programmable Protection Breakdown voltage 250 1 1 RL Packaging: RL = Tape & reel = Tube Package: 1 = SO-8 Plastic Version 6/7 TPP25011 MARKING Package SO-8 Type TPP25011 Marking TPP250 PACKAGE MECHANICAL DATA SO-8 Plastic DIMENSIONS REF. A a1 a2 b b1 C c1 D E e e3 F L M S Packaging : Products supplied antistatic tubes or tape and reel. Weight :0.08g 3.8 0.4 4.8 5.8 1.27 3.81 4.0 0.6 8 (max) 0.15 1.27 0.016 0.35 0.19 0.50 45 (typ) 5.0 6.2 0.189 0.228 0.050 0.150 0.157 0.050 0.024 0.197 0.244 0.1 Millimetres Min. Typ. Max. 1.75 0.25 0.004 1.65 0.48 0.014 0.25 0.007 0.020 Min. Inches Typ. Max. 0.069 0.010 0.065 0.019 0.010 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 (c) 2001 STMicroelectronics - Printed in Italy - All rights reserved. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 7/7 |
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