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H V SC AV ER OM AI SIO PL LA N IA BL S NT E
TISP4A270H3BJ ASYMMETRICAL-BIDIRECTIONAL THYRISTOR SPD
*R o
TISP4A270H3BJ LCAS RLINE Protector
Optimized LCAS RLINE Protector TISP4A270H3BJ V(BO) Derived from: -Break Switch, SW1 & SW2, Ratings -Ring Return Switch, SW3, Rating -Ringing Access Switch, SW4, Rating -Switch Isolation Ratings -Battery Voltage Range of -40 V to -60 V -Power Fault Conditions -Lightning Impulse Conditions -LCAS Characteristic Temperature Range TISP4A270H3BJ Designed for: -Battery-Backed Ringing Circuits Voltage Swing ........................................... +148 V to -206 V Allows ................. 103 V rms Ringing with -60 V Battery Temperature Range .................................. -40 C to +85 C
Device VDRM V `4A270 +160 -222 V(BO) V +217 -270
R G
SMB Package (Top View)
G1
2R
MD4A270B
Device Symbol and Circuit Application
'7581 LCAS TISP4165H3 TIP T LINE SW3 Ring return switch SW1 Break switch T BAT SCR, Diode protection Control logic T RING ING T SD F GND
SW2 Break switch
V BAT R BAT
R LINE SW4 Ringing access switch
Rated for International Surge Wave Shapes
Wave Shape 2/10 10/700 10/1000 Standard GR-1089-CORE ITU-T K.20/45/21 GR-1089-CORE IPPSM A 500 150 100
RING TISP4A270H3
V DD
LATCH INPUT
DGND R RINGING
AI4BITAMA
............................................ UL Recognized Components
Description
The TISP4A270H3BJ is an asymmetrical-bidirectional thyristor surge protective device (SPD). It is designed to limit the peak voltages on the RLINE (Ring Line) terminal of `7581/2/3 LCAS (Line Card Access Switch) devices. The TISP4A270H3BJ must have the bar-indexed terminal 1 (G) connected to the protective ground and terminal 2 (R) connected to the RLINE terminal. The TISP4A270H3BJ voltages are chosen to give RLINE terminal protection for all LCAS switch conditions. The most potentially stressful condition is low level power cross when the switches are closed. Under this condition, the TISP4A270H3BJ limits the voltage and corresponding LCAS dissipation until the LCAS thermal trip operates and opens the switches. Under open-circuit ringing conditions, the RLINE terminal will have high peak voltages. For battery backed ringing, the RLINE terminal will have a larger peak negative voltage than positive, i.e. the peak voltages are asymmetric. The TISP4A270H3BJ has a similar voltage asymmetry which will allow the maximum possible ringing voltage, while still giving protection. With a connected telephone line, the LCAS TLINE (Tip Line) terminal voltage levels will be less than 50 % of the open-circuit RLINE terminal values. So the TLINE terminal can be protected by a symmetricalbidirectional overvoltage protector of the TISP4xxxH3BJ series.
How to Order
For Standard Termination Finish Order As
TISP4A270H3BJR
Device TISP4A270H3BJ
Package BJ (SMB/DO-214AA with J-Bend)
Carrier R (Embossed Tape Reeled)
For Lead Free Termination Finish Order As
TISP4A270H3BJRS
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
Description (Continued)
These devices allow signal voltages up to the maximum off-state voltage value, VDRM , see Figure 1. Voltages above VDRM are clipped and will not exceed the breakover voltage, V(BO), level. If sufficient current flows due to the overvoltage, the device switches into a low-voltage on-state condition, which diverts the current from the overvoltage though the device. When the diverted current falls below the holding current, IH, level the devices switches off and restores normal system operation. The TISP4A270H3BJ is guaranteed to voltage limit and withstand the listed international lightning surges in both polarities. This high current protection device is in a plastic SMB package (JEDEC DO-214AA) and supplied in embossed tape reel pack.
Absolute Maximum Ratings, TA = 25 C (Unless Otherwise Noted)
Rating Repetitive peak off-state voltage, (see Note 1) Non-repetitive peak on-state pulse current (see Notes 2 and 3) 2/10 (GR-1089-CORE, 2/10 voltage wave shape) 5/310 (ITU-T K.44, 10/700 s voltage wave shape used in K.20/45/21) 10/1000 (GR-1089-CORE, 10/1000 voltage wave shape) Non-repetitive peak on-state current (see Notes 2, 3 and 4) 20 ms (50 Hz) full sine wave 16.7 ms (60 Hz) full sine wave 1000 s 50 Hz/60 Hz a.c. Initial rate of rise of on-state current, Junction temperature Storage temperature range NOTES: 1. 2. 3. 4. Exponential current ramp, Maximum ramp value < 200 A diT/dt TJ Tstg ITSM 55 60 2.2 400 -40 to +150 -65 to +150 A/s C C A IPPSM 500 150 100 A TA = 25 C TA = -40 C Symbol VDRM Value +160/-222 148/-206 Unit V
See Figure 7 for voltage values at intermediate temperatures. Initially, the TISP4A270H3BJ must be in thermal equilibrium with TJ = 25 C. The surge may be repeated after the TISP4A270H3BJ returns to its initial conditions. EIA/JESD51-2 environment and EIA/JESD51-3 PCB with standard footprint dimensions connected with 5 A rated printed wiring track widths. See Figure 6 for the current ratings at other durations. Derate current values at -0.61 % /C for ambient temperatures above 25 C.
Overload Ratings, TA = 25 C (Unless Otherwise Noted)
Rating Maximum overload on-state current without open circuit, 50 Hz/60 Hz a.c. (see Note 5) a 0.03 s 0.07 s 1.6 s 5.0 s 1000 s NOTE 5: IT(OV)M 60 40 8 7 2.2 Peak overload on-state current during a.c. power cross tests of GR-1089-CORE and UL 1950/60950. These electrical stress levels may damage the TISP4A270H3BJ silicon chip. After test, the pass criterion is either that the device is functional or, if it is faulty, that it has a short circuit fault mode. In the short circuit fault mode, the following equipment is protected as the device is a permanent short across the line. The equipment would be unprotected if an open circuit fault mode developed. A rms Symbol Value Unit
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
Electrical Characteristics, TA = 25 C (Unless Otherwise Noted)
Parameter Repetitive peak offstate current Test Conditions VD = +100 V and -200 V dv/dt = 250 V/ms, R SOURCE = 300 TA = 25 C TA = 85 C Min Typ Max 5 10 +217 -270 +231 -288 0.15 0.15 5 TA = 85 C VD = 100 V VD = 50 V VD = 10 V VD = 5 V VD = 2 V VD = 1 V Coff Off-state capacitance f = 1 MHz, V d = 1 V rms VD = 0 VD = -1 V VD = -2 V VD = -5 V . VD = -10 V VD = -50 V VD = -100 V 21 27 41 48 56 61 68 62 56 48 40 25 20 10 23 29 46 53 62 67 74 68 62 52 45 28 22 pF 0.6 0.6 Unit A V V A A kV/s A
IDRM
V(BO) Breakover voltage V(BO) Ramp breakover voltage I(BO) IH dv/dt ID Breakover current Holding current Critical rate of rise of off-state voltage Off-state current
dv/dt 1 kV/s, Linear voltage ramp, Maximum ramp value = 500 V dv/dt = 20 A/s, Linear current ramp, Maximum ramp value = 10 A dv/dt = 250 V/ms, R SOURCE = 300 I T = 5 A, di/dt = +/-30 mA/ms Linear voltage ramp, Maximum ramp value < 0.85V DRM V D = 50 V
Thermal Characteristics
Parameter Test Conditions EIA/JESD51-3 PCB, IT = ITSM(1000), RJA Junction to free air thermal resistance TA = 25 C, (see Note 6) 265 mm x 210 mm populated line card, 4-layer PCB, IT = ITSM(1000), TA = 25 C 50 Min Typ Max 113 C/W Unit
NOTE 6: EIA/JESD51-2 environment and PCB has standard footprint dimensions connected with 5 A rated printed wiring track widths.
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
Parameter Measurement Information
+i IPPSM Quadrant I Switching Characteristic
ITSM
V(BO)
IH IDRM -v VDRM IDRM IH VD ID ID VD VDRM +v I(BO)
I(BO)
V(BO)
ITSM Quadrant III Switching Characteristic IPPSM -i
PMXXAEA
Figure 1. Voltage-Current Characteristic for R and G Terminal Pair All Measurements are Referenced to the G Terminal
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
Typical Characteristics
OFF-STATE CURRENT vs JUNCTION TEMPERATURE
100 VD = 50 V 10 |ID| - Off-State Current - A
TCHAG
1.10
NORMALIZED BREAKOVER VOLTAGE vs JUNCTION TEMPERATURE TC4HAF
Normalized Breakover Vo ltage
1.05
1
0*1
1.00
0*01
0*001 -25 0 25 50 75 100 125 TJ - Junction Temperature - C 150
0.95 -25 0 25 50 75 100 125 TJ - Junction T emperature - C 150
Figure 2.
Figure 3.
ON-STATE CURRENT vs ON-STATE VOLTAGE
200 150 100 70 IT - On-State Current - A 50 40 30 20 15 10 7 5 4 3 2 1.5 1 0.7 1 1.5 2 3 45 VT - On-State Voltage - V 7 10
TC4HACBA
2.0
NORMALIZED HOLDING CURRENT vs JUNCTION TEMPERATURE TC4HAD
TA = 25 C tW = 100 s
1.5 Normalized Holding Current
1.0 0.9 0.8 0.7 0.6 0.5 0.4 -25 0 25 50 75 100 125 TJ - Junction T emperature - C 150
Figure 4.
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
Figure 5.
TISP4A270H3BJ LCAS RLINE Protector
Rating and Thermal Information
NON-REPETITIVE PEAK ON-STATE CURRENT vs CURRENT DURATION
ITSM(t) - Non-Repetitive Peak On-State Current - A 30 VGEN = 600 Vrms, 50/60 Hz 20 15 10 9 8 7 6 5 4 3
0.94
TI4HAC
VDRM DERATING FACTOR vs MINIMUM AMBIENT TEMPERATURE
1.00 0.99
TI4HADC
RGEN = 1.4*VGEN/ITSM(t) EIA/JESD51-2 ENVIRONMENT EIA/JESD51-3 PCB TA = 25 C
Derating Factor
0.98
0.97
0.96
0.95
2 1.5 0*1 1 10 100 1000
0.93 -40 -35 -30 -25 -20 -15 -10 -5
0
5
10 15 20 25
t - Current Duration - s
TAMIN - Minimum Ambient Temperature - C
Figure 6.
Figure 7.
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
APPLICATIONS INFORMATION
Calculation of the TISP4A270H3BJ Voltage Values
Figure 8 and the following text summarizes the derivation process for the TISP4A270H3BJ voltages. Details of the full process and other design aspects are covered by the document entitled TISP4A270H3BJ - Optimized `758x LCAS Overvoltage Protection.
Calculation of RLINE protector voltage parameters
A
Maximum SW1, SW2, SW3 and Isolation voltages at T AMIN
System TAMIN
Maximum TLINE and RLINE B voltage ratings set by SW1, SW2 and SW3
Maximum TBAT, RBAT and TRINGING bias voltages on SW1, SW2 and SW3, 0, Vbat
Maximum protector V(BO) C at TA = 25 C
Maximum power fault and impulse protection voltage increase of 25 C V(BO) = 1.15 x
D
Protector VDRM at TA = 25 C
V(BO) /VDRM factor for specific V(BO) voltage
E
Minimum protector VDRM at TAMIN
VDRM versus temperature data and TAMIN
RLINE protector V(BO) @ 25 C VDRM at 25 C and TAMIN
AI4CITRAMA
Figure 8. Derivation of TI SP4A270H3BJ V(BO) and V DRM
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
Calculation of the TISP4A270H3BJ Voltage Values (Continued)
Box A: The voltage rating of the break and ring return switches and their isolation decreases with temperature. At the minimum LCAS operating temperature of -40 C, the switch rating is 310 V. Box B: A switch pole voltage rating to ground is reduced by any opposing bias voltage applied to the other pole. For battery-backed ringing the d.c. bias on TRINGING is zero. Bias voltages are applied to the RBAT and TBAT poles by the SLIC. For SLIC output levels of zero and -60 V, the RLINE and TLINE voltage ratings to ground become +250 V and -310 V at -40 C. Box C: Allowing for the extreme condition of a power fault at -40 C, the overvoltage protector V(BO) at its highest temperature must not exceed +250 V and -310 V. The IEEE Standard C62.37.1-2000, IEEE Guide for the Application of Thyristor Surge Protective Devices, pp 25-27 recommends a factor of 1.15 for the ratio of the power fault V(BO) to the 25 C V(BO). Applying this factor makes the 25 C V(BO) voltage values +217 V and -270 V. Box D: From the V(BO) values the values of protector 25 C VDRM were determined as +160 V and -222 V. Box E: Derating the 25 C VDRM down to the LCAS minimum operating temperature gives -40 C VDRM values of +148 V and -206 V. A further rating check has to be done on the ringing access switch, SW4. The limit condition is in the negative ringing polarity. The applied ringing voltage to the RRINGING terminal must not exceed -205 V when the RLINE terminal is at +250 V. For a battery voltage of -40 V and -60 V the a.c. ringing levels must not exceed 117 V rms and 102 V rms respectively. In IVD (Integrated Voice Data) applications the a.c. ringing level must be reduced by the level of digital signal applied to the line. For a 20 V peak ADSL signal level, the ringing voltages reduce to 103 V rms and 89 V rms respectively. Figure 9 shows a typical application circuit. Fuses F1 and F2 need high breaking capacity to safely interrupt 40 A rms (UL 60950) and 60 A rms (Telcordia GR-1089-CORE) currents from a 600 V rms source. The Bourns(R) TelefuseTM type B1250T is a surface mount fuse which has UL recognition for these UL and Telcordia standards. The TISP4A270H3BJ is overload rated to carry currents up to 60 A rms for the time period that it takes the fuse to operate.
SW1 Break switch TBAT SCR, Diode protection SW3 Ring return switch FGND
'7581 LCAS TIP B1250T F1 Fuse overcurrent protectors RING F2 B1250T Low pass filter RLINE SW4 Ringing access switch VADSL RRINGING C1 ADSL MODEM High pass filter R1 TRINGING R2 TISP4165H3 TLINE
SLIC
G
R
SW2 Break switch
VBAT RBAT VDD
TISP4A270H3
Control logic
LATCH INPUT
Vbat
DGND
TSD
VRING VBAT Ring generator
AI4AITAM A
Figure 9. ADSL IVD using Common Protection
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
MECHANICAL DATA
Recommended Printed Wiring Land Pattern Dimensions
SMB Land Pattern 2.54 (.100)
2.40 (.095)
DIMENSIONS ARE:
MILLIMETERS (INCHES)
2.16 (.085)
MDXX BID
Device Symbolization Code
Devices will be coded as below. Terminal 1 is indicated by an adjacent bar marked on the package body.
Device Symbolization Code 4A270H
TISP4A270H3BJ
Carrier Information
For production quantities, the carrier will be embossed tape reel pack. Evaluation quantities may be shipped in bulk pack or embossed tape.
Package Carrier Standard Quantity Embossed Tape Reel Pack 3000
SMB
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
MECHANICAL DATA
SMB (DO-214AA) Plastic Surface Mount Diode Package
This surface mount package consists of a circuit mounted on a lead frame and encapsulated within a plastic compound. The compound will withstand soldering temperature with no deformation, and circuit performance characteristics will remain stable when operated in high humidity conditions. Leads require no additional cleaning or processing when used in soldered assembly.
SMB02 4.06 - 4.57 (.160 - .180)
3. 30 - 3. 94 (.130 - .155)
1
2
Index Mark
2. 00 - 2.40 (.079 - .094)
0. 76 - 1.52 (.030 - .060) 5. 21 - 5.59 (.205 - .220)
MILLIMETERS (INCHES)
1. 90 - 2.10 (.075 - .083)
0. 10 - 0. 20 (.004 - .008)
1. 96 - 2. 32 (.077 - .091)
DIMENSIONS ARE:
MDXXBHG
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
TISP4A270H3BJ LCAS RLINE Protector
MECHANICAL DATA
Tape Dimensions
SMB02 Package Single-Sprocket Tape
3. 90 - 4.10 (.154 - .161 ) 1. 95 - 2.05 (.077 - .081)
o
1. 50 MIN . (.059) 1. 55 - 1.65 o (.061 - .065 ) 1. 65 - 1.85 (.065 - .073 ) 0. 40 MAX . (.016)
5. 45 - 5.55 (.215 - .219 ) 11.70 - 12.30 (.461 - .484 )
8. 20 MAX . (.323)
e
7. 90 - 8.10 (.311 - .319 ) Direction of Feed Carrier Tape Embossment
0 MIN . Cover Tape
4. 50 MAX . (.177)
20
Maximum component rotation
Index Mark
MILLIMETERS (INCHES)
Typical component cavity center line Typical component center line
DIMENSIONS ARE:
NOTES: A. The clearance between the component and the cavity must be within 0.05 mm (.002 in) MIN. to 0.65 mm (.026 in) MAX. so that the component cannot rotate more than 20 within the determined cavity. B. Taped devices are supplied on a reel of the following dimensions:Reel diameter: 330 mm 3.0 mm (12.99 in .118 in) Reel hub diameter 75 mm (2.95 in) MIN. Reel axial hole: 13.0 mm 0.5 mm (.512 in .020 in) C. 3 000 devices are on a reel.
MDXXBHF
"TISP" is a trademark of Bourns, Ltd., a Bourns Company, and is Registered in U.S. Patent and Trademark Office. "Bourns" is a registered trademark of Bourns, Inc. in the U.S. and other countries.
APRIL 2002 - REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.

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