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THBT15011, THBT20011, THBT27011
Tripolar overvoltage protection for telecom line
Features

Bidirectional crowbar protection between tip and gnd, ring and gnd and between tip and ring Peak pulse current: IPP = 30 A for 10/1000 s surge Holding current: IH = 150 mA
SO-8
Complies with Telcordia standards
Telcordia GR-1089-Core, (second level) with line series resistors - 10/1000 s, 1000 V - 2/10 s, 2500 V (first level) - 2/10 s, 5000 V
Figure 1.
Schematic diagram
TIP 1 GND 2 GND 3 RING 4
8 TIP 7 GND 6 GND 5 RING
Description
Dedicated to telecommunication equipment protection, these devices provide a triple bidirectional protection function. They ensure the same protection capability with the same breakdown voltage both in longitudinal mode and transversal mode. A particular attention has been given to the internal wire bonding. The "4-point" configuration ensures a reliable protection, eliminating overvoltages introduced by the parasitic inductances of the wiring (Ldi/dt), especially for very fast transient overvoltages. Dynamic characteristics have been defined for several types of surges, in order to meet the SLIC maximum ratings.
February 2008
Rev 8
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www.st.com 10
Characteristics
THBT15011, THBT20011, THBT27011
1
Characteristics
Table 1.
Symbol IPP ITSM Tstg Tj TL Peak pulse current(1) Non repetitive surge peak on-state current (F = 50 Hz) Storage temperature range Maximum junction temperature Maximum lead temperature for soldering during 10s
Absolute maximum ratings (Tamb = 25 C)
Parameter 10 / 1000 s tp = 10 ms t=1s Value 30 8 3.5 - 40 to + 150 150 260 Unit A A C C
1. For pulse waveform see Figure 2
Figure 2.
Pulse waveform 10/1000 s, tr = 10 s, tp = 1000 s
% I PP 100
50
0 tr tp
t
Figure 3.
Test circuit for IPP
Longitudinal mode TIP
IPP/2 RP
See test circuit 3
RING
IPP/2 RP
THBT
GND
Transversal mode
TIP or RING I
See test circuit 3
PP
RP
THBT
GND
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THBT15011, THBT20011, THBT27011 Table 2.
Symbol Rth(j-a) Junction to ambient
Characteristics
Thermal resistance
Parameter Value 170 Unit C/W
Table 3.
Symbol VRM IRM VR VBR VBO IH IBO VF IPP C
Electrical characteristics (Tamb = 25 C)
Parameter Stand-off voltage Leakage current at stand-off voltage Continuous reverse voltage Breakdown voltage Breakover voltage Holding current Breakover current Forward voltage drop Peak pulse current Capacitance
IBO IH IR IPP
I
V
VRM V VBO BR
Table 4.
Static parameters
IRM @ VRM IR @ VR max.
(1)
VBO @ IBO max.
(2)
IH min.
(3)
C max.
(4)
Type
max.
min.
A THBT15011D THBT20011D THBT27011D 5 5 5
V 135 180 240
A 50 50 50
V 150 200 270
V 210 290 380
V 50 50 50
mA 400 400 400
mA 150 150 150
pF 80 80 80
1. IR measured at VR guarantee VBR min VR 2. Measured at 50 Hz (1 cycle) - See test circuit 1 (Figure 4). 3. See the reference test circuit 2 (Figure 5). 4. VR = 1 V bias, VRMS = 1 V, F = 1 MHz.
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Characteristics Table 5.
Type
THBT15011, THBT20011, THBT27011
Dynamic breakover voltages (transversal mode)
Symbol 10/700s 1.2/50s 2/10s 10/700s 1.2/50s 2/10s 10/700s 1.2/50s 2/10s Test conditions(1) 1.5kV 1.5kV 2.5kV 1.5kV 1.5kV 2.5kV 1.5kV 1.5kV 2.5kV Rp=10 Rp=10 Rp=62 Rp=10 Rp=10 Rp=62 Rp=10 Rp=10 Rp=62 IPP=30A IPP=30A IPP=38A IPP=30A IPP=30A IPP=38A IPP=30A IPP=30A IPP=38A Max 190 190 200 270 270 280 360 360 400 Unit
THBT15011D
VBO
V
THBT20011D
VBO
V
THBT27011D
VBO
V
1. See test circuit 3 for VBO dynamic parameters; Rp is the protection resistor located on the line card.
Figure 4.
Test circuit 1 for IBO and VBO parameters
K
ton = 20ms
R1 = 140 R2 = 240
220V 50Hz Vout
DUT
VBO measurement
1/4 IBO measurement
TEST PROCEDURE
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 V VOUT = 250 VRMS, R1 = 140 Device with VBO 200 V VOUT = 480 VRMS, R2 = 240
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THBT15011, THBT20011, THBT27011 Figure 5. Test circuit 2 for IH parameter
R
Surge generator
Characteristics
VBAT = - 48 V
D.U.T
This is a GO - NO GO test which allows confirmation of 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 IPP = 10 A,10/1000 s. 3/ The D.U.T. will come back off-state within 50 ms maximum.
Figure 6.
Test circuit 3 for VBO parameters
R4
(VP is defined in no load condition)
TIP R2 RING R3
L
VP
C1
R1
C2
G ND
Table 6.
Parameters for selected pulse characteristics
Vp (V) 1500 1500 2500 C1 (F) 20 1 10 C2 (nF) 200 33 0 L (H) 0 0 1.1 R1 () 50 76 1.3 R2 () 15 13 0 R3 () 25 25 3 R4 () 25 25 3 IPP (A) 30 30 38 Rp () 10 10 62
Pulse (s) tr 10 1.2 2 tp 700 50 10
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Application information Figure 7.
THBT15011, THBT20011, THBT27011 Surge peak current versus overload duration
ITSM(A)
10 9 8 7 6 5 4 3 2 1 0 1E-2 1E-1 1E+0
F=50Hz Tj initial=25C
t(s)
1E+1 1E+2 1E+3
2
Application information
Figure 8. Device connections
TIP 1
8 TIP
2 GND 3
7 GND 6
RING 4
5 RING
1. 2.
Connect pins 2, 3, 6 and 7 to Ground to guarantee a good surge current capability for long duration disturbances. To take advantage of the" 4-point" structure of the THBT, the TIP and RING lines have to cross the device. In this case, the device will eliminate the overvoltages generated by the parasitic inductances of the wiring (Ldi/dt), especially for very fast transients.
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THBT15011, THBT20011, THBT27011
Application information
2.1
Application circuits
Figure 9. Line card protection
RING GENERATOR
- VBAT
LINE A
T E S T R E L A Y S
PTC
RING RELAY
220 nF
SLIC
THBTxxxD
LINE B
LCP1521S
PTC
Figure 10. Protection for telephone set with ground key
Hook
LA
Speech dialing ringer
LB THBTxxxD
Ground key
E
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Package information
THBT15011, THBT20011, THBT27011
3
Package information
Epoxy meets UL94, V0
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at www.st.com. Table 7. SO-8 dimensions
Dimensions Ref.
Seating Plane C A2 A1 A
Millimeters Min. Typ. Max. 1.75 0.1 1.25 0.28 0.17 4.80 5.80 3.80 0.25 0.40 1.04 0 8 0.10 0 4.90 6.00 3.90 1.27 0.50 1.27 0.010 0.016 0.48 0.23 5.00 6.20 4.00 0.25 0.004 0.049 0.011 0.007 Min.
Inches Typ. Max. 0.069 0.010 0.019 0.009
h x 45
A A1 A2 b C D E
C
k L
b ppp C D
e
L1
0.189 0.193 0.197 0.228 0.236 0.244 0.150 0.154 0.157 0.050 0.020 0.050 0.041 8 0.004
8
5 E1 E
E1 e h L L1 k ppp
1
4
Figure 11. Footprint dimensions in mm (inches)
Figure 12. Marking
6.8 (0.268) 0.6 (0.024) 4.2 (0.165) 1.27 (0.050)
Pin 1 XXXXX : Marking ZZ : Manufacturing location Y : Year WW : week
xxxxxx
a
z z y ww
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THBT15011, THBT20011, THBT27011
Ordering information scheme
4
Ordering information scheme
Figure 13. Ordering information scheme
THBT 150 1 1 D RL
Bidirectional Trisil Breakdown voltage Version Package 1 = SO-8 plastic Dynamic Packing (Blank) = Tube RL = Tape and reel
5
Ordering information
Table 8. Ordering information
Marking BT151D BT201D BT271D SO-8 0.077 g Package Weight
Order code THBT15011D THBT20011D THBT27011D
6
Revision history
Table 9.
Date Oct-2003 19-Feb-2008
Document revision history
Revision 7A 8 Previous release Reformatted to current standards. Removed THBT16011D from Table 4 and Table 8. Updated Figure 4, Figure 5, and Figure 9. Added ECOPACK paragraph in Section 3. Added Figure 12: Marking. Changes
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THBT15011, THBT20011, THBT27011
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