LCDP1521S
Dual line programmable transient voltage suppressor for
SLIC protection
Datasheet - production data
Description
This device has been especially designed to
protect 2 new high voltage, as well as classical
SLICs, against transient overvoltages.
Positive overvoltages are clamped by 2 diodes.
Negative surges are suppressed by 2 thyristors,
their breakdown voltage being referenced to
-V
BAT
through the gate. Separated gates allow the
SLICs to be supplied by two different voltages.
SO-8
Figure 1: Functional diagram
Line
(TIP1 or RING1)
Line
(RING1 or TIP1)
Features
Dual line programmable transient voltage
suppressor with separated gates
Wide negative firing voltage range:
V
Gn
= -175 V max.
Low dynamic switching voltages:
V
FP
and V
DGL
Low gate triggering current: I
GT
= 5 mA max
Peak pulse current: I
PP
= 40 A (5/310 μs)
Holding current: I
H
= 150 mA min.
1
8
Gn1
2
7 GND
Gn2
3
6 GND
Line
(TIP2 or RING2)
Line
(RING2 or TIP2)
Benefits
A Trisil™ is not subject to ageing and
provides a fail safe mode in short circuit for a
better protection.
Trisils are used to help equipment to meet
various standards such as UL1950,
IEC 60950 / CSA C22.2, UL1459 and
TIA-968-A (formerly FCC part 68).
Trisils have UL94 V0 resin approved (Trisils
are UL497B approved - file: E136224).
4
5
February 2017
Doc16268 Rev 7
1/13
www.st.com
This is information on a product in full production.
LCDP1521S
Symbol
Parameter
Telcordia GR-1089-
CORE Issue 6, May
2011, section 4
TIA-968-A,
lightning surge type A
ITU-T K20/21/44/45,
(10/700 µs open circuit
voltage waveshape)
I
pp
Peak pulse current
(1)
Characteristics
Table 3: Absolute ratings ((0 °C < T
j
< 70 °C, unless otherwise specified))
Value
10/1000 µs
25
Unit
10/560 µs
30
5/310 µs
40
TIA-968-A,
lightning surge type A
IEC 61000-4-5,
(1.2/50 µs open circuit
waveshape) with 10 Ω
ITU-T K20/21/44/45,
(1.2/50 µs open circuit
voltage waveshape)
Telcordia GR-1089-
CORE Issue 6, (2/10 µs
open circuit waveshape)
10/160 µs
45
A
2/40 µs
85
8/20 µs
90
2/10 µs
t = 0.2 s
t=1s
t=2s
t = 15 mn
-40 °C < T
amb
<
+85 °C
100
5
3.5
3
1.3
-175
-55 to + 150
260
I
TSM
Non repetitive surge
peak on-state current
(50 Hz sinusoidal)
(1)
Negative battery
voltage range
Storage junction temperature range
Maximum operating junction temperature
Maximum temperature for soldering during 10 s
A
V
GN
T
stg
T
j
T
L
Notes:
(1)
V
°C
°C
The rated current values may be applied either to the Ring to GND or to the Tip to GND terminal pairs.
Additionally, the four terminal pairs may have their rated current values applied simultaneously (in this case the
GND terminal current will be four times the rated current value of an individual terminal pair)
Doc16268 Rev 7
3/13
LCDP1521S
Table 4: Parameters (T
j
= 25 °C unless otherwise specified)
Symbol
I
GT
I
H
V
GT
I
RG
V
DGL
(1)
V
F
V
FP
I
R
C
Notes:
(1)
Characteristics
Test conditions
V
LINE
= -48 V
V
Gn
= -48 V
at I
GT
V
RG
= -175 V
V
RG
= -175 V
T
j
= 25 °C
T
j
= 85 °C
t = 500 μs
Min.
0.05
150
2.5
5
50
5
2
8
T
j
= 25 °C
T
j
= 85 °C
18
35
5
50
Typ.
Max.
5
Unit
mA
mA
V
µA
V
V
V
µA
pF
V
Gn
= -48 V, 10/700 μs, 1.5 kV, R
S
= 0 Ω, I
PP
= 37.5 A
I
F
= 1 A
10/700 μs, 1.5 kV, R
S
= 0 Ω, I
PP
= 37.5 A
V
Gn / LINE
= -1 V, V
LINE
= -175 V
V
Gn / LINE
= -1 V, V
LINE
= -175 V
V
LINE
= -50 V, V
RMS
= 1 V, f = 1 MHz
V
LINE
= -2 V, V
RMS
= 1 V, f = 1 MHz
The oscillations with a time duration lower than 50 ns are not taken into account.
Table 5: Recommended gate capacitance
Symbol
C
G
Component
Gate decoupling capacitance
Min.
100
Typ.
220
Max.
-
Unit
nF
Doc16268 Rev 7
5/13
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