|
If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
Datasheet File OCR Text: |
CLP30-200B1 Application Specific Discretes A.S.D.TM MAIN APPLICATIONS Any telecom equipment submitted to transient overvoltages and lightning strikes such as : Analog and ISDN line cards PABX DESCRIPTION The CLP30-200B1 is designed to protect telecommunication equipment. It provides both a transient overvoltage protection and an overcurrent protection. The external components (balanced resistors, ring relays contact, ...) needed by the CLP30-200B1 protection concept require very low power rating. This results in a very cost effective protection solution. FEATURES DUAL BIDIRECTIONAL PROTECTION DEVICE. HIGH PEAK PULSE CURRENT : IPP = 40A (10/700 s SURGE) IPP = 30A (10/1000 s SURGE) MAX. VOLTAGE AT SWITCHING-ON : 290V MIN. CURRENT AT SWITCHING-OFF : 150mA BENEFITS Voltage and current controlled suppression. Surface Mounting with SO8 package. Very low power rating of external components on line card : balanced resistors, ring relay, low voltage SLIC protection. COMPLIES WITHTHEFOLLOWINGSTANDARDS : 10/700s 5/310s VDE0433 10/700s 5/310s VDE0878 1.2/50s 1/20s Bellcore TR-1089-CORE 2/10 s FCC Part 68 2/10s Bellcore TR-NWT-000 (*) with series resistors or PTC. OVERVOLTAGE AND OVERCURRENT PROTECTION FOR TELECOM LINE SO8 SCHEMATIC DIAGRAM (Top view) TIPL 1 TIPS GND GND GND GND RINGL RINGS CCITT K20 1 kV Ipp=25 A 2 kV Ipp=40 A (*) 1.5 kV Ipp=40 A 2.5 kV Ipp=75 A (*) 1 kV Ipp=30 A (*) 10/1000s 10/1000s February 1998 - Ed: 3 1/11 CLP30-200B1 BLOCK DIAGRAM TIPL TIPS Overcurrent detector OR SW1 Overvoltage detector Overvoltage reference (> 200 V) GND SW2 OR Overvoltage detector Overvoltage reference (> 200 V) Overcurrent detector RINGL RINGS Pin 1 2/3/6/7 4 5 8 Symbol TIPL GND RINGL RINGS TIPS Description TIP (Line side) Ground RING (Line side) RING(SLICside) TIP (SLIC side) 2/11 CLP30-200B1 APPLICATION NOTE 1.INTRODUCTION The aim of this section is to show the behavior of our new telecom line protection device. Fig.1 : Suscriber line protection topology 2. SGS-THOMSON CLP30-200B1 CONCEPT 2.1 Evolution of the SLIC protection Over the years, the performances of the SLICs considerably increased and therefore the need of the protectionhas also evolved. The CLP30-200B1 is especially designed for the protection of this new generationof SLIC. For this, it is based on both overvoltage and overcurrent protection modes. SLIC "PRIMARYPROTECTION" "SECONDARY PROTECTION" telecommunication line CLP30200B1 VOLTAGE REFERENCE MDF EXCHANGE LINE CARD Fig.2 : Line card protection I Programmab thanks to le an external resistor Figure 1 is a simplified block diagram of a subscriber line protection that is mainly used so far. This shows two different things : A "primary protection" located on the Main Distribution Frame (MDF) eliminates coarsely the high energy environmental disturbances (lightning transients and AC power mains disturbances) for which the CCITT K20 requires a 4kV 10/700 s test. This can be assumed either by gas-tubes or silicon protection such as the TLPxxM. A "secondary protection" located on the line card eliminates finely the remaining transients that have not been totally suppressed by the first stage. The CCITT K20 requires a 1 kV 10/700 s test. At this stage, the protection is managed by the CLP30-200B1. The explanations which follow are basically Programmab thanks to le any external voltage reference - VSWON + I SWON +V SWON V - I SWON Line Card operating conditions The figure 2 summarises the performance of the CLP30-200B1 which basically holds the SLIC inside its correct voltage and current values. 3/11 CLP30-200B1 APPLICATION CIRCUIT : CLP30-200B1 in line card Fig.3 : CLP30-200B1in line card PTC TIP R sense I R TIPL TIPS 1 -Vbat Rp Overcurrent detector 2 Overvoltage detector Overvoltage reference (> 200 V) -Vbat TIP OR SW1 External voltage reference 1 SLIC GND SW2 OR Overvoltage detector Overvoltage reference (> 200 V) Rp RING 2 Overcurrent detector Ring Generator PTC RING RINGL RINGS R sense R Figure above shows the topology of a protected analog subscriber line at the line card side. A first stage based on CLP30-200B1 manages the high power issued from the external surges. When used in ringing mode, the CLP30-200B1 operates in voltage mode and provides a symmetrical and bidirectional overvoltage protection above 200 V on both TIP and RING lines. When used in speech mode, the CLP30-200B1 operates in current mode and the activation current of the CLP30-200B1is adjusted by RSENSE. A second stage which is the external voltage reference device defines the firing threshold voltage during the speech mode and also assumes a residual power overvoltage suppression. This stage can be either a fixed or programmable device such as LCP1511D. 4/11 CLP30-200B1 2.3 Ringing mode Fig.4 : Switching by voltage during ringing mode. ILG TIP R sense ILG A1 TIPL TIPS 1/2 CLP200M Overcurrent detector 2 Overvoltage detector Overvoltage reference (>200V) 1 2 1 -200 VLG OR SW1 1 3 +200 VLG GND In ringing mode (Ring relay in position 2), the only protection device involved is the CLP30-200B1. In normal conditions, the CLP30-200B1 operates in region 1 of A1 curve, and is idle. If an overvoltage occurring between TIP (or RING) and GND reaches the internal overvoltage reference (+/- 200V), the CLP30-200B1 acts and the line is short-circuited to GND. At this time the operating point moves to region 2 for positive surges (region 3 for negative surges). Once the surge current disappears, the device returns to its initial state (region 1). For surges occurring between TIP and RING, the CLP30-200B1 acts in the same way. This means that the CLP30-200B1 ensures a tripolar protection. When used alone, the CLP30-200B1 acts at the internal overvoltage reference level (+/- 200 V). Furthermore, it is possible to adjust this threshold level to a lower voltage by using up to 4 fixed external voltage reference (VZ1 to VZ4) (see fig.5). Fig.5 : Methode to adjust the reference voltage. 1 TIP R sense TIPL TIPS VZ1 Overcurrent detector 2 OR SW1 Overvoltage detector Overvoltage reference (>200V) VZ2 GND SW2 OR Overvoltage detector Overvoltage reference (>200V) VZ3 Overcurrent detector VZ4 RINGL RINGS 1 RING R sense 2 5/11 CLP30-200B1 2.4 Speech mode Fig.6 : Switching by current during speech mode. ILG TIP R sense ILG TIPL TIPS 1 Rp -Vbat 6 4 Overcurrent detector 2 Overvoltage detector Overvoltage reference (>200V) External voltage reference -VBAT VLG OR SW1 VLG 5 GND In speech mode (Ring relay in position 1), the protection is provided by the combination of both CLP30-200B1 and the external voltage reference device (for example LCP1511D). In normal conditions, the working point of this circuit is located in region 4 of A2 curve : the CLP30-200B1 is idle. When a surge occurs on the line, the external voltage reference device clamps at GND or -Vbat respectively for positive and negative surges. This generates a current which is detected by RSENSE and causes the protection to act : the line is short-circuited to GND. The operating point moves to region 6 for positive surges or region 5 for negative surges. Once the surge current falls below the switching-off current ISWOFF, the CLP30-200B1 returns to its initial state (region 4). Furthermore, the CLP30-200B1 switches when an overvoltage, either positive or negative, occurs either : simultaneouslyon both TIP and RING lines versus GND. between TIP and RING. on TIP (or RING) versus GND. 6/11 CLP30-200B1 The choice of the switching-on current is function of the RSENSE resistors. Fig . 7a and 7b : Switching-on current versus RSENSE This current (typically above 150 mA) should not activate the protection device CLP30-200B1. Thereforethe level of activationis to be chosen just below this limit (typically 200mA). This level is adjusted through RSENSE. Figures 7a and 7b enable the designers to choose the right RSENSE value. example The choice of RSENSE = 3 ensures a negative triggering of -280 mA min and -380mA max. In this case, the positive triggering will be 220mA min and 320mA max. Thanks to the CLP30-200B1 topology, the surge current in the line is reduced after it. Because the remaining surge energy is low, the power ratings of RP, the relay contacts and the external voltage reference device may be kept low. This results in a significant cost reduction for the whole system. Iswon (mA) 600 500 400 300 200 Iswon @ 0C Iswon @ 25C Iswon @ 70C 100 2 3 4 5 6 7 8 9 10 Rsense ( ) Relative variation of ISWON versus R SENSE at various temperature Iswon @ 25C (mA) 500 Iswon min negative Iswon max negative Iswon min positive Iswon min positive ............ 300 200 100 3 5 7 Rsense ( ) 9 11 Relative variation of ISWON versus R SENSE at Tamb = 25C 7/11 CLP30-200B1 ABSOLUTE MAXIMUM RATINGS (RSENSE = 3 ,amb = 25C) Symbol IPP Parameter Line to GND peak pulse current 10/1000 s (open circuit voltage wave shape 10/1000 s) 5/310 s (open circuit voltage wave shape 10/700 s) Non repetitive surge peak on-state current F = 50 Hz Storage temperature range Maximum junction temperature Lead temperature for soldering during 10 s. tp = 10 ms tp = 200 ms tp = 1 s Value 30 40 8.5 4.5 3.5 -40 to +150 150 260 Unit A A C C ITSM Tstg Tj TL ELECTRICAL CHARACTERISTICS (RSENSE = 3 , and T amb = 25 C) Symbol ILGL Parameter Line to GND leakage current Test condtions VLG = 200 V Measured between TIP (or RING) and GND Min Max 10 Unit A VLG VSWON ISWOFF ISWON C Line to GND operating voltage Line to GND voltage at SW1 or SW2 switching-on Line to GND negative current at SW1 or SW2 switching-off Line current at SW1 or SW2 switching-on Line to GND capacitance Measured at50 Hz betweenTIPL (or RINGL)and GND,onecycle Refer to test circuit fig 9 Positive surge Negative surge VLG = 0V VOSC= 200mVRMS F = 1MHz 150 220 280 200 290 V V mA 320 380 100 mA pF THERMAL RESISTANCE Symbol Rth(j-a) Junction to ambient Parameter Value 170 Unit C/W 8/11 CLP30-200B1 Fig.8 : TEST CIRCUIT FOR ISWOFF PARAMETER : GO - NO GO TEST TIPL or RINGL R -V D.U.T. BAT = - 48 V GND Surge generator This is a GO-NO GO test which allows to confirm the switch-off current (IH ) level in 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 = 10 A, 10/1000 s - The D.U.T will come back to the off-state within a duration of 50 ms max. Fig. 10 : Variation of switching-on current versus RSENSE at 25 C. Iswon @ 25C (mA) 500 Iswon min negative Iswon max negative Iswon min positive Iswon min positive Fig. 9 : Typical variation of switching-on current (positive or negative) versus RSENSE resistor and junction temperature (see test condition Fig. 11). Iswon (mA) 600 500 400 300 200 Iswon @ 0C Iswon @ 25C Iswon @ 70C ............ 300 200 100 100 2 3 4 5 6 7 8 9 10 3 Rsense ( ) 5 7 Rsense ( ) 9 11 Fig. 11 : ISWON MEASUREMENT - ISWON = l1 when the CLP30-200B1 switches on (l1 is progressively increased using R) - Both TIP and RING sides of the CLP30-200B1 are checked - RL = 10 . Rsense RL I1 fig. 12 : Relative variation of switching-off current versus junction temperature (for RSENSE between 3 and 10 ). ISWOFF [TjC] / ISWOFF [25C] 1.4 1.2 1 48 V TIPL TIPS R 0.8 0.6 0.4 0 20 40 Temperature (C) 60 80 DUT GND RINGL RINGS 9/11 CLP30-200B1 fig. 13 : Relative variation of switching-off current versus RSENSE (between 3 and 10 ). Fig. 14 : Relative variation of switching-on voltage versus dV/dt with an external resistor of 3 . VSWON / V REF 1.12 1.10 1.08 1.06 ISWOFF [Rsense] / ISWOFF [4 ] 1.6 1.4 1.2 1.0 0.8 0.6 0.4 4 6 8 Rsense ( ) 10 1.04 1.02 1.00 0.98 0.1 0.3 1 3 10 30 100 300 1000 dV/dt (V/s) Fig. 15 : Relative variation of internal reference voltage versus junction temperature (ILG =1mA). Fig. 16 : Capacitance (TIP/GND) versus applied voltage (typical values). C (pF) VREF [TjC] / V REF [25C] 1.10 1.05 70 50 1.00 0.95 30 20 0.90 0.85 -40 -20 0 20 40 60 Tj (C) 10 1 2 3 5 10 VR (V) 20 30 50 100 Fig. 17 : Surge peak current versus overload duration (maximum values). 10 ITSM(A) 8 6 4 2 t(s) 0 0.01 0.1 1 10 100 1000 10/11 CLP30-200B1 ORDER CODE CLP Current Limiting Protection SO8 Peak Pulse Current MARKING Package SO8 Type CLP30-200B1 Marking CLP30 Minimum Operating Voltage 30 200 B1 RL RL = tape and reel = tube PACKAGE MECANICAL DATA SO8 plastic DIMENSIONS REF. A a1 a2 b b1 C c1 D E e e3 F L M S 4.8 5.8 1.27 3.81 3.8 0.4 4.0 0.15 1.27 0.016 0.6 8 (max) 0.35 0.19 0.50 45(typ) 5.0 0.189 6.2 0.228 0.050 0.150 0.157 0.050 0.024 Millimetres Min. 0.1 Typ. Max. Min. 1.75 0.25 0.004 1.65 0.48 0.014 0.25 0.007 0.020 0.197 0.244 Inches Typ. Max. 0.069 0.010 0.065 0.019 0.010 Packaging : Product supplied in antistatic tubes or tape and reel Weight : 0.08g Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1998 SGS-THOMSON Microelectronics - Printed in Italy - All rights reserved. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany -Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 11/11 |
Price & Availability of CLP30-200B1 |
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
[Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |