August 2006 Rev 1 1/15
15
CLP30-200B1
ASD (Application Specific Devices)
Overvoltage and overcurrent protection for telecom line
Features
■Dual bidirectional protection device
■High peak pulse current:
–I
PP = 40 A (5/310 µs surge)
–I
PP = 30 A (10/1000 µs surge)
■Max. voltage at switching-on: 290 V
■Min. current at switching-off: 150 mA
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.
Main applications
Any telecom equipment submitted to transient
overvoltages and lightning strikes such as :
■Analog and ISDN line cards
■PABX
Benefits
■Voltage and current controlled suppression
■Surface Mounting with SO-8 package
■Very low power rating of external components
on line card: balanced resistors, ring relay, low
voltage SLIC protection
■TRISILs™ are not subject to ageing and
provide a fail safe mode in short circuit for a
better level of protection. Trisils are used to
ensure equipment meets various standards
such as UL60950, IEC950 / CSA C22.2,
UL1459 and FCC part 68. Trisils have UL94 V0
approved resin (Trisils are UL497B approved
[file: E136224]).
TM: TRISIL is a trademark of STMicroelectronics
Order code
Figure 1. CLP30-200B1 schematic diagram
Part Number Marking
CLP30-200B1RL CLP30
SO-8
1
TIPL
RINGL
TIPS
GND
GND
RINGS
GND
GND
www.st.com
CLP30-200B1
2/15
Figure 2. Block diagram
Pin Symbol Description
1 TIPL TIP (line side)
2 / 3 / 6 / 7 GND Groung
4 RINGL RING (line side)
5 RINGS RING ( SLIC side)
8 TIPS TIP (SLIC side
Overvoltage
reference
(> 200 V)
Overvoltage
detector
Overcurrent
detector
OR
OR
TIPL TIPS
RINGL RINGS
GND
SW1
SW2
Overvoltage
reference
(> 200 V)
Overvoltage
detector
Overcurrent
detector
CLP30-200B1 Characteristics
3/15
1 Characteristics
Table 1. Standards compliance
Standard
Peak
surge
voltage
(V)
Voltag e
waveform
Required
peak
current
(A)
Current
waveform
Minimum serial
resistor to meet
standard (Ω)
GR-1089 Core First level 2500
1000
2/10 µs
10/1000 µs
500
100
2/10 µs
10/1000 µs
12
24
GR-1089 Core
Second level 5000 2/10 µs 500 2/10 µs 24
GR-1089 Core
Intra-building 1500 2/10 µs 100 2/10 µs 0
ITU-T-K20/K21 6000
1500 10/700 µs 150
37.5 5/310 µs 110
0
ITU-T-K20 (IEC 61000-4-2) 8000
15000 1/60 ns ESD contact discharge
ESD air discharge
0
0
VDE0433 4000
2000 10/700 µs 100
50 5/310 µs 60
10
VDE0878 4000
2000 1.2/50 µs 100
50 1/20 µs 0
0
IEC61000-4-5 4000
4000
10/700 µs
1.2/50 µs
100
100
5/310 µs
8/20 µs
60
0
FCC Part 68,
lightning surge type A
1500
800
10/160 µs
10/560 µs
200
100
10/160 µs
10/560 µs
22.5
15
FCC Part 68,
lightning surge type B 1000 9/720 µs 25 5/320 µs 0
Table 2. Thermal resistance
Symbol Paramete Value Unit
Rth(j-a) Junction to ambient 170 ° C/W
Characteristics CLP30-200B1
4/15
Figure 3. Test circuit for ISWOFF parameter: GO-NO GO test
Table 3. Absolute maximum ratings (RSENSE = 3 Ω, Tamb = 25° C)
Symbol Parameter Value Unit
IPP
Line to GND peak pulse current
– 10/1000 µs (open circuit voltage wave shape 10/1000 µs)
– 5/310 µs (open circuit voltage wave shape 10/700 µs)
30
40
A
ITSM
Non repetitive surge peak on-state current
F = 50 Hz
tp = 10 ms
tp = 200 ms
tp = 1 s
8.5
4.5
3.5
A
Tstg
Tj
Storage temperature range
Maximum junction temperature
-40 to
+150
150
°C
TLLead temperature for soldering during 10 s. 260 °C
Table 4. Electrical characteristics (RSENSE = 3 Ω, Tamb = 25° C)
Symbol Parameter Test condtions Min Max Unit
ILGL Line to GND leakage current
VLG = 200 V
Measured between TIP
(or RING) and GND
10 µA
VLG Line to GND operating voltage 200 V
VSWON
Line to GND voltage at SW1 or
SW2 switching-on
Measured at 50 Hz between TIPL
(or RINGL) and GND,one cycle 290 V
ISWOFF
Line to GND negative current
at SW1 or SW2 switching-off Refer to test circuit fig 9 150 mA
ISWON
Line current at SW1 or SW2
switching-on
Positive surge
Negative surge
220
280
320
380 mA
C Line to GND capacitance VLG = 0 V
VOSC = 200 mVRMS F = 1MHz 100 pF
R
GND Surge generator
V = -48 V
BAT
-VP
TIPL or RINGL
This is a GO-NO GO test which allows to confirm the holding current (I ) level in a functional test circuit.
- Adjust the current level at the I value by short circuiting the D.U.T.
- Fire the D.U.T. with a surge current: I = 10A, 10/1000 µs
- The D.U.T. will come back to the off-state within a duration of 50 ms max.
H
H
PP
TEST PROCEDURE:
D.U.T
CLP30-200B1 Characteristics
5/15
Figure 4. Typical variation of switching-on
current (positive or negative)
versus RSENSE resistor and
junction temperature (see test
condition figure 6)
Figure 5. Variation of switching-on current
versus RSENSE at 25° C
2345678910
100
200
300
400
500
600
R()
SENSE
Ω
I (mA)
SWON
I @ 0° C
SWON I @ 25° C
SWON I @ 70° C
SWON
I @ 25° C (mA)
SWON
357911
100
200
300
500
R()
SENSE
Ω
Imin
negative
SWON
Imin
positive
SWON
Imax
positive
SWON
Imax
negative
SWON
Figure 6. ISWON MEASUREMENT:
–I
SWON = 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 Ω
Figure 7. Relative variation of switching-off
current versus junction
temperature (for RSENSE between 3
and 10 Ω)
R
R
L
R
SENSE
TIPL TIPS
RINGS
GND
RINGL
I1
±48 V
DUT
020406080
0.4
0.6
0.8
1
1.2
1.4
I [T ° C] / [25° C]
SWOFF j
I
SWOFF
Temperature (° C)
Characteristics CLP30-200B1
6/15
Figure 8. Relative variation of switching-off
current versus RSENSE (between 3
and 10 Ω)
Figure 9. Relative variation of switching-on
voltage versus dV/dt with an
external resistor of 3 Ω
46810
0.4
0.6
0.8
1.0
1.2
1.4
1.6
R()
SENSE
Ω
I[R] / [4]
SWOFF
Ω
SENSE SWOFF
I
V/V
SWON REF
0.1 0.3 1 3 10 30 100 300 1000
0.98
1.00
1.02
1.04
1.06
1.08
1.10
1.12
dV/dt (V/µs)
Figure 10. Relative variation of internal
reference voltage versus junction
temperature (ILG =1 mA)
Figure 11. Capacitance (TIP/GND) versus
applied voltage (typical values)
Figure 12. Surge peak current versus overload
duration (maximum values)
V [T ° C] / V
REF j REF [25° C]
-40 -20 0 20 40 60
0.85
0.90
0.95
1.00
1.05
1.10
T (° C)
j
C (pF)
1 2 3 5 10 20 30 50 100
10
20
30
50
70
V (V)
R
0.01 0.1 1 10 100 1000
0
2
4
6
8
10
ITSM (A)
t (S)
CLP30-200B1 Technical information
7/15
2 Technical information
2.1 Introduction
The aim of this section is to show the behavior of our new telecom line protection device.
Figure 13. Suscriber line protection topology
Figure 13. 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 ITU-T-K20 requires a 4 kV 10/700 µs 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 ITU-T-K20
requires a 1 kV 10/700 µs test. At this stage, the protection is managed by the CLP30-
200B1.
The explanations which follow are basically covering the line card application.
2.2 STMicroelectronics CLP30-200B1 concept
2.2.1 Evolution of the SLIC protection
Over the years, the performances of the SLICs considerably increased and therefore the
need of the protection has also evolved.
The CLP30-200B1 is especially designed for the protection of this new generation of SLIC.
For this, it is based on both overvoltage and overcurrent protection modes.
Telecommunication
"PRIMARY PROTECTION"
MDF LINE CARD
EXCHANGE
line
SLIC
"SECONDARY PROTECTION"
CLP30-
200B1
VO LTAGE
REFERENCE
Technical information CLP30-200B1
8/15
Figure 14. Line card protection
Figure 14. summarises the performance of the CLP30-200B1 which basically holds the
SLIC inside its correct voltage and current values.
2.2.2 Application circuit
Figure 15. CLP30-200B1 in line card
The Figure 15. 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 CLP30-200B1 is adjusted by RSENSE.
Programmable thanks to
an external resistor
Programmable thanks to
any external voltage reference
V
I
Line Card operating conditions
+ ISWON
-V
SWON
+V
SWON
- ISWON
RINGS
TIP
SLIC
Overvoltage
detector
Overcurrent
detector
OR
OR
TIPL TIPS
RINGL
GND
SW1
SW2
1
1
2
2
Ring
Generator
TIP
RING
RING
I
RS
RS
PTC
PTC
Overcurrent
detector
Overvoltage
reference
(> 200 V)
Overvoltage
reference
(> 200 V)
Overvoltage
detector
-V
BAT
-V
BAT
External
voltage
reference
Rp
Rp
RSENSE
RSENSE
CLP30-200B1 Technical information
9/15
■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.
2.2.3 Ringing mode
Figure 16. Switching by voltage during ringing mode
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 (+/- 200 V), 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
(+/- 200V). 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 Figure 17.).
Overvoltage
detector
Overcurrent
detector
OR
TIPL TIPS
1/2 CLP200M
GND
SW1
1
2
2
1
1
3
- 200
+ 200
TIP
ILG
VLG
ILG
VLG
Overvoltage
reference
(> 200 V)
RSENSE
A1
Technical information CLP30-200B1
10/15
Figure 17. Method to adjust the reference voltage
2.2.4 Speech mode
Figure 18. Switching by current during speech mode
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.
RINGS
Overvoltage
detector
Overcurrent
detector
OR
OR
TIPL TIPS
VZ1
VZ3
VZ2
VZ4
RINGL
GND GND
SW1
SW2
1
1
2
2
TIP
RING
Overcurrent
detector
Overvoltage
reference
(> 200 V)
Overvoltage
reference
(> 200 V)
Overvoltage
detector
RSENSE
RSENSE
Overvoltage
detector
Overcurrent
detector
OR
TIPL TIPS
GND
SW1
1
2
6
4
5
TIP
ILG
VLG
-V
BAT
ILG
VLG
-V
BAT
Overvoltage
reference
(> 200 V)
RSENSE
External
voltage
reference
Rp
CLP30-200B1 Technical information
11/15
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:
■ simultaneously on both TIP and RING lines versus GND
■ between TIP and RING
■ on TIP (or RING) versus GND
The choice of the switching-on current is function of the RSENSE resistors.
This current (typically above 150 mA) should not activate the protection device CLP30-
200B1.
Therefore the level of activation is to be chosen just below this limit (typically 200 mA). 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 Ω ensures a negative triggering of -280 mA min and -380 mA
maximum.
In this case, the positive triggering will be 220 mA min and 320 mA 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.
Figure 19. Switching-on current versus
RSENSE: relative variation of ISWON
versus RSENSE at various
temperature
Figure 20. Switching-on current versus
RSENSE: relative variation of ISWON
versus RSENSE at Tamb = 25° C
2345678910
100
200
300
400
500
600
R()
SENSE
Ω
I (mA)
SWON
I @ 0° C
SWON I @ 25° C
SWON I @ 70° C
SWON
I @ 25° C (mA)
SWON
357911
100
200
300
500
R()
SENSE
Ω
Imin
negative
SWON
Imin
positive
SWON
Imax
positive
SWON
Imax
negative
SWON
Ordering information scheme CLP30-200B1
12/15
3 Ordering information scheme
CLP 30 - 200 B1 RL
Current Limiting Protection
Peak Pulse Current
Minimum operating voltage
Package
Packing
30 = 30 A
200 = 200 V
B1 = SO-8
RL = Tape and reel
CLP30-200B1 Package information
13/15
4 Package information
Figure 21. SO-8 footprint (dimensions in mm)
Table 5. SO-8 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 1.75 0.069
A1 0.1 0.25 0.004 0.010
A2 1.25 0.049
b 0.28 0.48 0.011 0.019
C 0.17 0.23 0.007 0.009
D 4.80 4.90 5.00 0.189 0.193 0.197
E 5.80 6.00 6.20 0.228 0.236 0.244
E1 3.80 3.90 4.00 0.150 0.154 0.157
e 1.27 0.050
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
L1 1.04 0.041
k°0808
ccc 0.10 0.004
E1
D
8
41
5
E
k
h x 45°
L
L1
C
(Seating
Plane) 0.25mm
(Gage Plane)
e
A
A2
bA1
ccc C
C
Ordering information CLP30-200B1
14/15
5 Ordering information
6 Revision history
Part Number Marking Package Weight Base qty Delivery mode
CLP30-200B1RL CLP30 SO-8 0.11 g 2500 Tape and reel
Date Revision Description of Changes
28-Aug-2006 1 First issue.
CLP30-200B1
15/15
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