LCP1521S
Programmable transient voltage suppressor for SLIC protection
Datasheet - production data
Description
These devices have been especially designed to
protect 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.
These components present a very low gate
triggering current (IGT) in order to reduce the
current consumption on printed circuit board
during the firing phase.
Figure 1: Functional diagram
SO-8
Features
Programmable transient suppressor
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.
Line
TIP or RING
Line
TIP or RING
1
Gate (Gn)
GND
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 UL60950, 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)
NC
Line
RING or TIP
GND
Line
RING or TIP
December 2017
DocID16804 Rev 7
1/14
www.st.com
This is information on a product in full production.
Characteristics
LCP1521S
1
Characteristics
Table 1: Standards compliance
Standard
GR-1089 Core
First level
GR-1089 Core
Second level
GR-1089 Core
Intra-building
ITU-T-K20/K21
ITU-T-K20 (IEC
61000-4-2)
IEC 61000-4-5
TIA-968-A,
lightning surge
type A
TIA-968-A,
lightning surge
type B
Peak surge
voltage (V)
2500
1000
5000
1500
6000
1500
8000
15000
4000
4000
1500
800
Voltage
waveform
2/10 μs
10/1000 μs
2/10 μs
2/10 μs
10/700 μs
1/60 ns
10/700 μs
1.2/50 μs
10/160 μs
10/560 μs
9/720 μs
Required
peak current
(A)
500
100
500
100
150
37.5
Current
waveform
2/10 μs
10/1000 μs
2/10 μs
2/10 μs
5/310 μs
Minimum serial
resistor to meet
standard ( Ω )
12
24
24
0
110
0
0
0
60
0
22.5
15
ESD contact discharge
ESD air discharge
100
100
200
100
5/310 μs
8/20 μs
10/160 μs
10/560 μs
5/320 μs
1000
25
0
Table 2: Thermal resistances
Symbol
R
th(j-a)
Junction to ambient
Parameter
Value
120
Unit
°C/W
2/14
DocID16804 Rev 7
LCP1521S
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)
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)
I
TSM
Non repetitive surge peak on-state current (50 Hz sinusoidal)
Characteristics
Table 3: Absolute ratings (T
j
= 25 °C, unless otherwise specified)
Value
10/1000 µs
10/560 µs
5/310 µs
10/160 µs
4/30 µs
8/20 µs
30
35
40
50
A
110
120
Unit
2/10 µs
t = 20 ms
t = 200 ms
t=1s
150
18
10
7
-175
-55 to + 150
260
A
V
GN
T
stg
T
j
T
L
Notes:
(1)
Negative battery
voltage range
Storage junction temperature range
Operating junction temperature range
-40 °C < T
amb
< +85 °C
V
°C
°C
Maximum temperature for soldering during 10 s
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). Both GND pins must be connected to GND.
DocID16804 Rev 7
3/14
Characteristics
Figure 2: Electrical characteristics (definitions)
LCP1521S
Figure 3: Pulse waveform
4/14
DocID16804 Rev 7
LCP1521S
Table 4: Parameters (T
j
= 25 °C, unless otherwise specified)
Symbol
I
GT
I
H
V
GT
I
RG
V
LINE
= -48 V
V
Gn
= -48 V
at I
GT
V
RG
= -175 V
V
RG
= -175 V
10/700 μs
V
DGL
(1)
V
Gn
= -48 V
1.2/50 μs
2/10 μs
V
F
I
F
= 1 A
10/700 μs
V
FP
1.2/50 μs
2/10 μs
I
R
C
Notes:
(1)
The
Characteristics
Test conditions
Min.
0.1
150
2.5
T
j
= 25 °C
T
j
= 85 °C
1.5 kV
1.5 kV
2.5 kV
R
S
= 10 Ω
R
S
= 10 Ω
R
S
= 62 Ω
t = 500 μs
1.5 kV
1.5 kV
2.5 kV
R
S
= 10 Ω
R
S
= 10 Ω
R
S
= 62 Ω
T
j
= 25 °C
T
j
= 85 °C
15
35
I
PP
= 30 A
I
PP
= 30 A
I
PP
= 38 A
5
50
7
10
25
3
5
9
30
5
50
µA
pF
V
V
V
Typ.
Max.
5
Unit
mA
mA
V
µA
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
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
DocID16804 Rev 7
5/14
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