SMP100LC-65 TRISIL FOR TELECOM EQUIPMENT PROTECTION

Size: px

Start display at page:

Download "SMP100LC-65 TRISIL FOR TELECOM EQUIPMENT PROTECTION"

Franklin Tucker
5 years ago
Views:

1 SMP1LC TRISIL FOR TELECOM EQUIPMENT PROTECTION FEATURES Bidirectional crowbar protection Voltage range from 8V to 4V Low capacitance from 2pF to 5V Low leakage current : I R = 2µA max Holding current: I H = 15 ma min Repetitive peak pulse current: I PP = 1 A (1/1µs) MAIN APPLICATIONS Any sensitive equipment requiring protection against lightning strikes and power crossing. These devices are dedicated to central office protection as they comply with the most stressfull standards. Their Low Capacitances make them suitable for ADSL. DESCRIPTION The SMP1LC is a series of low capacitance transient surge arrestors designed for the protection of high debit rate communication equipment. Its low capacitance avoids any distortion of the signal and is compatible with digital transmission line cards (xdsl, ISDN...). SMP1LC series tested and confirmed compatible with Cooper Bussmann Telecom Circuit Protector TCP 1.25A. BENEFITS Trisils are not subject to ageing and provide a fail safe mode in short circuit for a better protection. They are used to help equipment to meet main standards such as UL695, IEC95 / CSA C22.2 and UL1459. They have UL94 V approved resin. SMB package is JEDEC registered (DO-214AA). Trisils comply with the following standards GR- 189 Core, ITU-T-K2/K21, VDE433, VDE878, IEC and FCC part 68. Table 1: Order Codes Part Number SMP1LC-8 SMP1LC-25 SMP1LC-35 SMP1LC-65 SMP1LC-9 SMP1LC-12 SMP1LC-14 SMP1LC-16 SMP1LC-2 SMP1LC-23 SMP1LC-27 SMP1LC-32 SMP1LC-36 SMP1LC-4 SMB (JEDEC DO-214AA) Figure 1: Schematic Diagram Marking PL8 L25 L35 L6 L9 L12 L14 L16 L2 L23 L27 L32 L36 L4 June 25 REV. 11 1/1

2 SMP1LC Table 2: In compliance with the following standards STANDARD GR-189 Core First level GR-189 Core Second level GR-189 Core Intra-building ITU-T-K2/K21 ITU-T-K2 (IEC61-4-2) VDE433 VDE878 IEC FCC Part 68, lightning surge type A FCC Part 68, lightning surge type B Peak Surge Voltage (V) 25 1 Waveform Voltage 2/1 µs 1/1 µs Required peak current (A) 5 1 Current waveform 2/1 µs 1/1 µs Minimum serial resistor to meet standard (Ω) 5 2/1 µs 5 2/1 µs 15 2/1 µs 1 2/1 µs /7 µs 1/6 ns 1/7 µs 1.2/5 µs 1/7 µs 1.2/5 µs 1/16 µs 1/56 µs /31 µs ESD contact discharge ESD air discharge /31 µs 1/2 µs 5/31 µs 8/2 µs 1/16 µs 1/56 µs 1 9/72 µs 25 5/32 µs Table 3: Absolute Ratings (T amb = 25 C) Symbol Parameter Value Unit I PP Repetitive peak pulse current (see figure 2) 1/1 µs 8/2 µs 1/56 µs 5/31 µs 1/16 µs 1/2 µs 2/1 µs I FS Fail-safe mode : maximum current (note 1) 8/2 µs 5 ka I TSM Non repetitive surge peak on-state current (sinusoidal) t =.2 s t = 1 s t = 2 s t = 15 mn I 2 t I 2 t value for fusing t = 16.6 ms t = 2 ms T stg T j Storage temperature range Maximum junction temperature to T L Maximum lead temperature for soldering during 1 s. 26 C Note 1: in fail safe mode, the device acts as a short circuit A A A 2 s C 2/1

3 SMP1LC Table 4: Thermal Resistances Symbol Parameter Value Unit R th(j-a) Junction to ambient (with recommended footprint) 1 C/W R th(j-l) Junction to leads 2 C/W Table 5: Electrical Characteristics (T amb = 25 C) Symbol V RM V BR V BO I RM I PP I BO I H V R Parameter Stand-off voltage Breakdown voltage Breakover voltage Leakage current Peak pulse current Breakover current Holding current Continuous reverse voltage I R C Leakage current at V R Capacitance Types I V RM I V R Dynamic V BO Static V I BO I H C C max. max. max. max. max. min. typ. typ. note1 note 2 note 3 note 4 note 5 note 6 µa V µa V V V ma ma pf pf SMP1LC (typ.) NA 75 SMP1LC NA 65 SMP1LC NA 55 SMP1LC SMP1LC SMP1LC SMP1LC SMP1LC SMP1LC SMP1LC SMP1LC SMP1LC SMP1LC SMP1LC Note 1: IR measured at VR guarantee VBR min VR Note 2: see functional test circuit 1 Note 3: see test circuit 2 Note 4: see functional holding current test circuit 3 Note 5: VR = 5V bias, VRMS=1V, F=1MHz Note 6: VR = 2V bias, VRMS=1V, F=1MHz 3/1

4 SMP1LC Figure 2: Pulse waveform Figure 3: Non repetitive surge peak on-state current versus overload duration 1 %IPP Repetitive peak pulse current tr = rise time (µs) tp = pulse duration time (µs) 7 6 I TSM(A) F=5Hz Tj initial = 25 C tr tp t 1 t(s) 1E-2 1E-1 1E+ 1E+1 1E+2 1E+3 Figure 4: On-state voltage versus on-state current (typical values) Figure 5: Relative variation of holding current versus junction temperature I T(A) I H[T j] / I H[T j=25 C] 1 2. Tj initial = 25 C V (V) T T ( C) j Figure 6: Relative variation of breakover voltage versus junction temperature Figure 7: Relative variation of leakage current versus junction temperature (typical values) 1.8 V BO[ Tj] / V BO[ Tj=25 C] 2 I R[ Tj] / I R[ Tj=25 C] T ( C) j T j( C) /1

5 SMP1LC Figure 8: Variation of thermal impedance junction to ambient versus pulse duration (Printed circuit board FR4, SCu=35µm, recommended pad layout) Figure 9: Relative variation of junction capacitance versus reverse voltage applied (typical values) 1 Z th(j-a) /Rth(j-a) C [V R] / C [V R=2V] F =1MHz V RMS = 1V T j = 25 C t p(s) 1 1E-3 1E-2 1E-1 1E+ 1E+1 1E+2 5E+2.2 V (V) R APPLICATION NOTE 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. Ring relay Line Protection stage Line Protection stage Ex. Analog line card Ex. ADSL 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 (5/6Hz). It acts by safe circuits opening. Lightning surge and mains disturbance surges are defined by standards like GR189, FCC part 68, ITU-T K2. Fuse TCP 1.25A Fuse TCP 1.25A T1 Tip L Tip S SMP1LC-xxx SMP1LC-xxx Gnd Gnd T2 Fuse TCP 1.25A Ring L SMP1LC-xxx Ring S Typical circuit for subscriber side Typical circuit for central office side 5/1

6 SMP1LC Following figure shows the test method of the board having Fuse and Trisil. Following curve shows the turn on of the Trisil during lightning surge. Surge Generator I surge Line side Test board Device to be protected V I surge (1A/div) Oscilloscope V (5V/div) Current probe Voltage probe These topologies, using SMP1LC from ST and TCP1.25A from Cooper Bussmann, have been functionally validated with a Trisil glued on the PCB. Following example was performed with SMP1LC-27 Trisil. For more information, see Application Note AN264. Following curve shows Trisil action while the fuse remains operational. Test conditions: 2/1µs + and -2.5 and 5kV 5A (1 pulses of each polarity), T amb = 25 C Test result: Fuse and Trisil OK after test in accordance with GR189 requirements In case of high current power cross test, the fuse acts like a switch by opening the circuit. I surge (2A/div) I surge (1A/div) V (1V/div) V (1V/div) Test conditions: 6V 3A 1.1s (first level), T amb = 25 C Test result: Fuse and Trisil OK after test in accordance with GR189 requirements Test conditions: 277V 25A (second level), T amb = 25 C Test result: Fuse safety opened and Trisil OK after test in accordance with GR189 requirements 6/1

7 SMP1LC Figure 1: Test circuit 1 for Dynamic I BO and V BO parameters 1 V / µs, di/dt < 1 A / µs, Ipp = 1 A 2 Ω 45 Ω 83 Ω 46 µh U 1 µf 66 Ω 47 Ω.36 nf KeyTek 'System 2' generator with PN246I module 1 kv / µs, di/dt < 1 A / µs, Ipp = 1 A 26 µh 25 Ω 47 Ω 46 µh U 6 µf 12 Ω KeyTek 'System 2' generator with PN246I module Figure 11: Test circuit 2 for I BO and V BO parameters K ton = 2ms R1 = 14Ω R2 = 24Ω 22V 5Hz Vout DUT VBO measurement 1/4 IBO measurement TEST PROCEDURE Pulse test duration (tp = 2ms): for Bidirectional devices = Switch K is closed for Unidirectional devices = Switch K is open VOUT selection: Device with V BO < 2V V OUT = 25 V RMS, R1 = 14Ω Device with VBO 2V V OUT = 48 V RMS, R2 = 24Ω 7/1

8 SMP1LC Figure 12: Test circuit 3 for dynamic I H parameter R Surge generator V BAT =-48V D.U.T This is a GO-NOGO test which allows to confirm the holding current (I H) level in a functional test circuit. TEST PROCEDURE 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 I PP = 1A, 1/1µs. 3/ The D.U.T. will come back off-state within 5ms maximum. Figure 13: Ordering Information Scheme SMP 1 LC - xxx Trisil Surface Mount Repetitive Peak Pulse Current 1 = 1A Capacitance LC = Low Capacitance Voltage 65 = 65V 8/1

9 SMP1LC Figure 14: SMB Package Mechanical data C E1 E L D A1 A2 b DIMENSIONS REF. Millimeters Inches Min. Max. Min. Max. A A b c E E D L Figure 15: Foot Print Dimensions (in millimeters) Table 6: Ordering Information Part Number Marking Package Weight Base qty Delivery mode SMP1LC-8 PL8 SMP1LC-25 L25 SMP1LC-35 L35 SMP1LC-65 L6 SMP1LC-9 L9 SMP1LC-12 L12 SMP1LC-14 L14 SMP1LC-16 L16 SMB.11 g 25 Tape & reel SMP1LC-2 L2 SMP1LC-23 L23 SMP1LC-27 L27 SMP1LC-32 L32 SMP1LC-36 L36 SMP1LC-4 L4 Table 7: Revision History Date Revision Description of Changes 9-Nov-24 9 Absolute ratings values, table 3 on page 2, updated. 7-Dec-24 1 SMP1LC-32, SMP1LC-36 and SMP1LC-4 addition. 2-Jun Telecom Circuit Protector added 9/1

10 SMP1LC 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. All other names are the property of their respective owners 24 STMicroelectronics - All rights reserved STMicroelectronics group of compagnies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 1/1

SMP30 TRISIL FOR TELECOM EQUIPMENT PROTECTION

SMP30 TRISIL FOR TELECOM EQUIPMENT PROTECTION SMP3 TRISIL FOR TELECOM EQUIPMENT PROTECTION FEATURES Bidirectional crowbar protection Voltage range from 62V to 27V Low capacitance from 1pF to 2pF typ.@ 5V Low leakage current: I R = 2µA max. Holding